Company lists · Data refreshed September 2026
Top 25 Open space preservation organizations based in the United States
RevenueBase identified 348 company matches for open space preservation organizations associated with the United States as of September 2026 and tracks 5,788 professional contacts across them, including 2,557 with verified work emails. Washington is the largest hub.
This list covers company matches for open space preservation organizations associated with the United States, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 20, 2026.
Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.
The 25 largest open space preservation organizations based in the United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 660 contacts → | ||||
Exact match “The East Bay Regional Park District is a system of beautiful parklands, open space, and trails in Alameda and Contra Costa counties east of San Francisco.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase | |||||
| 2 | 554 contacts → | ||||
Exact match “Mass Audubon is the largest nature-based conservation organization in New England.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase | |||||
| 3 | 531 contacts → | ||||
Exact match “Trust for Public Land (TPL) is a national nonprofit that works to connect everyone to the benefits and joys of the outdoors.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase | |||||
| 4 | 303 contacts → | ||||
Exact match “Named a USA Top Workplace in 2023** For a century, National Parks Conservation Association has been a powerful independent voice working to strengthen and protect America's…” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase | |||||
| 5 | 108 contacts → | ||||
Exact match “The Land Trust Alliance is the voice of the land trust community.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase | |||||
| 6 | 80 contacts → | ||||
Exact match “Natural Lands is dedicated to preserving and nurturing nature’s wonders while creating opportunities for joy and discovery in the outdoors for everyone.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase | |||||
| 7 | 77 contacts → | ||||
Exact match “In 1995, the Anne Springs Close Greenway, a 2,100 acre nature preserve in Fort Mill, South Carolina, was dedicated to the public to serve as a natural buffer from urban…” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase | |||||
| 8 | 75 contacts → | ||||
Exact match “Our Mission: POST protects open space on the Peninsula and in the South Bay for the benefit of all.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase | |||||
| 9 | 64 contacts → | ||||
Exact match “Founded in 1964, Delaware Nature Society works to improve the environment through conservation, advocacy, and education.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase | |||||
| 10 | 63 contacts → | ||||
Exact match “McHenry County Conservation District exists to preserve, restore and manage natural areas and open spaces for their intrinsic value and for the benefits to present and future…” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase | |||||
| 11 | 60 contacts → | ||||
Exact match “As innovative protectors and stewards of the land since 1963, Openlands exists to create access to nature for all.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase | |||||
| 12 | 52 contacts → | ||||
Exact match “Join the Western Reserve Land Conservancy Group for current updates and discussions!” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase | |||||
| 13 | 43 contacts → | ||||
Exact match “Sequoia Riverlands Trust conserves the lands and waters of California's heartland.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase | |||||
| 14 | 42 contacts → | ||||
Exact match “Where nature education, conservation, and science meet.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase | |||||
| 15 | 42 contacts → | ||||
Exact match “Since 1901, the Society for the Protection of New Hampshire Forests has worked to establish permanent conservation areas and promote the wise stewardship of private lands.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase | |||||
| 16 | 42 contacts → | ||||
Exact match “Rocky Mountain Conservancy is the primary nonprofit partner of Rocky Mountain National Park and similar lands across Colorado and Wyoming.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase | |||||
| 17 | 41 contacts → | ||||
Exact match “We improve the health of our communities by preserving and restoring natural areas and open space, protecting rivers and watersheds, and promoting stewardship of our environment.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase | |||||
| 18 | 41 contacts → | ||||
Exact match “Heritage Conservancy’s mission is to protect and care for the lands of our region, to engage with and share the history that unfolded on these lands, and to connect people with…” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase | |||||
| 19 | 39 contacts → | ||||
Exact match “The Minnesota Land Trust is a private, nonprofit organization that works across Minnesota with private landowners and partners to permanently protect land and shoreline and…” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase | |||||
| 20 | 39 contacts → | ||||
Exact match “OC Parks encompasses regional, wilderness and historical facilities, as well as coastal areas throughout the County of Orange in California.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase | |||||
| 21 | 38 contacts → | ||||
Exact match “The Pennsylvania Environmental Council (PEC) protects and restores the natural and built environments through innovation, collaboration, education and advocacy.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase | |||||
| 22 | 38 contacts → | ||||
Exact match “Founded in 1995, The Wildlands Conservancy (TWC) is dedicated to preserving the beauty and biodiversity of the earth and providing programs so that children may know the wonder…” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase | |||||
| 23 | 36 contacts → | ||||
Exact match “Ruffed Grouse Society & American Woodcock Society unite conservationists to improve wildlife habitat and forest health.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase | |||||
| 24 | 36 contacts → | ||||
Exact match “Conserving Carolina (formerly Carolina Mountain Land Conservancy and Pacolet Area Conservancy) is dedicated to protecting and stewarding land and water resources vital to our…” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase | |||||
| 25 | 36 contacts → | ||||
Exact match “OUR MISSION: To preserve land and restore habitat for the education and enjoyment of all.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase | |||||
RevenueBase SmartSearch
Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.
This list uses Exact for “open space preservation organizations”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.
Showing 25 of 348 open space preservation organizations based in the United States
See the full list, filter by size, metro and specialty, and access 2,557 tracked professional contacts with verified work emails. Direct dials are available where recorded.
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Open space preservation organizations based in the United States at a glance
As of Sep 20, 2026Companies by employee count
Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 348 companies.
How this list was built
The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.
- Source
- The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
- What qualifies
- Company records associated with the United States whose business descriptions match “open space preservation organizations” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
- RevenueBase SmartSearch
- Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
- Public preview
- The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
- Match quality
- RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
- Ranking
- Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
- Verification
- Every displayed company carries at least one verified work email. RevenueBase tracks 2,557 professional contacts with verified work emails across the full matched dataset. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
- Refresh
- This page's figures were pulled from the company graph on September 20, 2026. Lists refresh periodically as the graph is re-checked.
- Record context
- Company records and descriptions can change. Check the company's website for its current services and locations.
Frequently asked
What is RevenueBase SmartSearch?
RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “open space preservation organizations”; each Exact match badge shows search membership, not an individual similarity or quality score.
How many open space preservation organizations are there based in the United States?
RevenueBase identified 348 company matches for open space preservation organizations associated with the United States as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.
What is the largest company on this list?
East BAY Regional Park District tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.
Which city has the most open space preservation organizations?
Washington leads with 5 company records, followed by Concord (4) and Princeton (4).
How do I get contact information for these companies?
A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 2,557 professional contacts with verified work emails tracked across these 348 companies; direct dials are available where recorded.
How current is this list?
The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 20, 2026.
Ready to reach these companies? Verified emails and direct dials for all 348 open space preservation organizations based in the United States. Start with a free account, no credit card.
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About this data
RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase SmartSearch, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.
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Company intelligence · public preview
Top 25 open space preservation organizations based in the United States
Find companies in any niche.
Describe the businesses you want in your own words. RevenueBase SmartSearch matches company descriptions by meaning.
RevenueBase records 348 matching company records for open space preservation organizations based in the United States, with 5,788 tracked contacts and 2,557 verified work emails.
This public preview shows 25 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: September 20, 2026.
RevenueBase compiles business descriptions for niche-company discovery; each row shows a recorded excerpt where available. Adapt this search to find the companies and contacts you want.
Top 25 open space preservation organizations based in the United States
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
| # | Company | Headquarters on record | Reported employees | RevenueBase SmartSearch | Tracked contacts |
|---|---|---|---|---|---|
| 1 | East BAY Regional Park Districtebparks.org HQ: Oakland, CA, United StatesReported employees: 501-1,000 | Oakland, CA, United States | 501-1,000 | Exact match | 660 contacts → |
“The East Bay Regional Park District is a system of beautiful parklands, open space, and trails in Alameda and Contra Costa counties east of San Francisco.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 | Mass Audubonmassaudubon.org HQ: Lincoln, MA, United StatesReported employees: 201-500 | Lincoln, MA, United States | 201-500 | Exact match | 554 contacts → |
“Mass Audubon is the largest nature-based conservation organization in New England.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 | Trust For Public Landtpl.org HQ: San Francisco, CA, United StatesReported employees: 201-500 | San Francisco, CA, United States | 201-500 | Exact match | 531 contacts → |
“Trust for Public Land (TPL) is a national nonprofit that works to connect everyone to the benefits and joys of the outdoors.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 | HQ: Washington, DC, United StatesReported employees: 51-200 | Washington, DC, United States | 51-200 | Exact match | 303 contacts → |
“Named a USA Top Workplace in 2023** For a century, National Parks Conservation Association has been a powerful independent voice working to strengthen and protect America's…” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 | Land Trust Alliancelandtrustalliance.org HQ: Washington, DC, United StatesReported employees: 51-200 | Washington, DC, United States | 51-200 | Exact match | 108 contacts → |
“The Land Trust Alliance is the voice of the land trust community.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 | Natural Landsnatlands.org HQ: Media, PA, United StatesReported employees: 51-200 | Media, PA, United States | 51-200 | Exact match | 80 contacts → |
“Natural Lands is dedicated to preserving and nurturing nature’s wonders while creating opportunities for joy and discovery in the outdoors for everyone.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 | Anne Springs Close Greenwayascgreenway.org HQ: Fort Mill, SC, United StatesReported employees: 201-500 | Fort Mill, SC, United States | 201-500 | Exact match | 77 contacts → |
“In 1995, the Anne Springs Close Greenway, a 2,100 acre nature preserve in Fort Mill, South Carolina, was dedicated to the public to serve as a natural buffer from urban…” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 | Peninsula Open Space Trust Postopenspacetrust.org HQ: Palo Alto, CA, United StatesReported employees: 51-200 | Palo Alto, CA, United States | 51-200 | Exact match | 75 contacts → |
“Our Mission: POST protects open space on the Peninsula and in the South Bay for the benefit of all.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 | Delaware Nature Societydelnature.org HQ: Hockessin, DE, United StatesReported employees: 51-200 | Hockessin, DE, United States | 51-200 | Exact match | 64 contacts → |
“Founded in 1964, Delaware Nature Society works to improve the environment through conservation, advocacy, and education.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 | Mchenry County Conservation Districtmccdistrict.org HQ: Woodstock, IL, United StatesReported employees: 51-200 | Woodstock, IL, United States | 51-200 | Exact match | 63 contacts → |
“McHenry County Conservation District exists to preserve, restore and manage natural areas and open spaces for their intrinsic value and for the benefits to present and future…” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 | Openlandsopenlands.org HQ: Chicago, IL, United StatesReported employees: 11-50 | Chicago, IL, United States | 11-50 | Exact match | 60 contacts → |
“As innovative protectors and stewards of the land since 1963, Openlands exists to create access to nature for all.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 | Western Reserve Land Conservancywrlandconservancy.org HQ: Moreland Hills, OH, United StatesReported employees: 11-50 | Moreland Hills, OH, United States | 11-50 | Exact match | 52 contacts → |
“Join the Western Reserve Land Conservancy Group for current updates and discussions!” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 | Sequoia Riverlands Trustsequoiariverlands.org HQ: Visalia, CA, United StatesReported employees: 11-50 | Visalia, CA, United States | 11-50 | Exact match | 43 contacts → |
“Sequoia Riverlands Trust conserves the lands and waters of California's heartland.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 | Earthplaceearthplace.org HQ: Westport, CT, United StatesReported employees: 51-200 | Westport, CT, United States | 51-200 | Exact match | 42 contacts → |
“Where nature education, conservation, and science meet.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 | Society For The Protection Of NEW Hampshire Forestsforestsociety.org HQ: Concord, NH, United StatesReported employees: 11-50 | Concord, NH, United States | 11-50 | Exact match | 42 contacts → |
“Since 1901, the Society for the Protection of New Hampshire Forests has worked to establish permanent conservation areas and promote the wise stewardship of private lands.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 | Rocky Mountain Conservancyrmconservancy.org HQ: Estes Park, CO, United StatesReported employees: 11-50 | Estes Park, CO, United States | 11-50 | Exact match | 42 contacts → |
“Rocky Mountain Conservancy is the primary nonprofit partner of Rocky Mountain National Park and similar lands across Colorado and Wyoming.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 | The Conservation Foundationtheconservationfoundation.org HQ: Naperville, IL, United StatesReported employees: 11-50 | Naperville, IL, United States | 11-50 | Exact match | 41 contacts → |
“We improve the health of our communities by preserving and restoring natural areas and open space, protecting rivers and watersheds, and promoting stewardship of our environment.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 | Heritage Conservancyheritageconservancy.org HQ: Doylestown, PA, United StatesReported employees: 11-50 | Doylestown, PA, United States | 11-50 | Exact match | 41 contacts → |
“Heritage Conservancy’s mission is to protect and care for the lands of our region, to engage with and share the history that unfolded on these lands, and to connect people with…” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 | Minnesota Land Trustmnland.org HQ: St. Paul, MN, United StatesReported employees: 11-50 | St. Paul, MN, United States | 11-50 | Exact match | 39 contacts → |
“The Minnesota Land Trust is a private, nonprofit organization that works across Minnesota with private landowners and partners to permanently protect land and shoreline and…” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 | Orange County Parksocparks.com HQ: Irvine, CA, United StatesReported employees: 501-1,000 | Irvine, CA, United States | 501-1,000 | Exact match | 39 contacts → |
“OC Parks encompasses regional, wilderness and historical facilities, as well as coastal areas throughout the County of Orange in California.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 | HQ: Pittsburgh, PA, United StatesReported employees: 11-50 | Pittsburgh, PA, United States | 11-50 | Exact match | 38 contacts → |
“The Pennsylvania Environmental Council (PEC) protects and restores the natural and built environments through innovation, collaboration, education and advocacy.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 | The Wildlands Conservancywildlandsconservancy.org HQ: Oak Glen, CA, United StatesReported employees: 51-200 | Oak Glen, CA, United States | 51-200 | Exact match | 38 contacts → |
“Founded in 1995, The Wildlands Conservancy (TWC) is dedicated to preserving the beauty and biodiversity of the earth and providing programs so that children may know the wonder…” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 | Ruffed Grouse Society & American Woodcock Societyruffedgrousesociety.org HQ: Coraopolis, PA, United StatesReported employees: 11-50 | Coraopolis, PA, United States | 11-50 | Exact match | 36 contacts → |
“Ruffed Grouse Society & American Woodcock Society unite conservationists to improve wildlife habitat and forest health.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 | Conserving Carolinaconservingcarolina.org HQ: Hendersonville, NC, United StatesReported employees: 11-50 | Hendersonville, NC, United States | 11-50 | Exact match | 36 contacts → |
“Conserving Carolina (formerly Carolina Mountain Land Conservancy and Pacolet Area Conservancy) is dedicated to protecting and stewarding land and water resources vital to our…” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 | HQ: Rancho Palos Verdes, CA, United StatesReported employees: 11-50 | Rancho Palos Verdes, CA, United States | 11-50 | Exact match | 36 contacts → |
“OUR MISSION: To preserve land and restore habitat for the education and enjoyment of all.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 25 of 348 company matches
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Open space preservation organizations: dataset insights
September 20, 2026These summaries describe recorded coverage in this saved dataset. This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Reported company sizes
345 records in the displayed employee bands.
3 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 348 companies.
How this company list was built
Describe a niche in your own words: companies installing commercial solar, or manufacturers of sustainable packaging. RevenueBase SmartSearch finds companies whose compiled business descriptions match by meaning. This list is one saved example to adapt.
Where the company descriptions come from
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
RevenueBase SmartSearch matching settings
- Exact
- Closest fits to the business described.
- Similar
- Similar businesses with a wider range of fits.
- Related
- Related businesses in and around the category.
- Broad
- A broader set of businesses connected to the description.
RevenueBase SmartSearch · Exact match identifies inclusion in this search's closest semantic matching setting. It is not a per-company confidence score, a literal keyword match, or a quality endorsement.
Selection, ordering and scope
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Recorded company descriptions support research; check company websites for current services. The selected preview is ordered by tracked contacts and is not a list of the best service providers.
Snapshot: September 20, 2026.
RevenueBase is a B2B data infrastructure company. Its September 3, 2026 published methodology describes a graph of 60 million companies and 398.9 million professional contacts; these platform figures differ from this page's totals. Published methodology ↗
Questions about this company list
What does Exact match mean for open space preservation organizations?
The separate RevenueBase SmartSearch column identifies inclusion at the closest semantic matching preset. It is not a literal keyword match, a per-company confidence score or a quality endorsement. Changing the search form opens a new search in RevenueBase; it does not reclassify these saved rows.
How many open space preservation organizations did RevenueBase find based in the United States?
The saved snapshot records 348 matching company records, 5,788 tracked contacts and 2,557 verified emails. The public preview displays 25 selected records.
Where do the company descriptions come from?
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
How are the public companies ordered?
The selected public records are ordered by contacts tracked in RevenueBase, highest first. Contact coverage is a prospecting measure, not an assessment of the company's services or quality.
How can I get contact information?
Select a company's contact count to open its filtered contacts in RevenueBase. Free signup is required and includes 500 credits and limited free results. Verified emails, direct dials and mobile numbers depend on available coverage.
How current is this list?
Snapshot: September 20, 2026. Review each company's website for current services and locations. A recorded business description does not establish that every company offers every service named in the search.
What do headquarters and employee bands mean?
These are recorded company-level fields, rather than a map of every branch or a count of specialists. Missing headquarters or employee bands are labeled; older records may show a location separately from recorded headquarters.
Build your next target company list
Adapt this niche search and work with available contacts in RevenueBase.
Related lists
Cite this list
RevenueBase Data Team. Top 25 open space preservation organizations based in the United States. Snapshot: September 20, 2026. https://revenuebase.ai/companies/open-space-preservation-organizations/united-states.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗
More company lists
- All company lists
- Lists by location
- Lists A-Z
- New lists
- AI companies based in the United States
- Cybersecurity companies based in the United States
- Manufacturing companies based in the United States
- Media companies based in the United States
- Oil and gas companies based in the United States
- Real estate companies based in the United States
Company intelligence · public preview
Top 25 open space preservation organizations based in the United States
RevenueBase records 348 matching company records for open space preservation organizations based in the United States, with 5,788 tracked contacts and 2,557 verified work emails.
This public preview shows 25 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: September 20, 2026.
RevenueBase compiles business descriptions for niche-company discovery; each row shows a recorded excerpt where available. Adapt this search to find the companies and contacts you want.
Top 25 open space preservation organizations based in the United States
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
| # | Company | Headquarters on record | Reported employees | RevenueBase SmartSearch | Tracked contacts |
|---|---|---|---|---|---|
| 1 | East BAY Regional Park Districtebparks.org HQ: Oakland, CA, United StatesReported employees: 501-1,000 | Oakland, CA, United States | 501-1,000 | Exact match | 660 contacts → |
“The East Bay Regional Park District is a system of beautiful parklands, open space, and trails in Alameda and Contra Costa counties east of San Francisco.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 | Mass Audubonmassaudubon.org HQ: Lincoln, MA, United StatesReported employees: 201-500 | Lincoln, MA, United States | 201-500 | Exact match | 554 contacts → |
“Mass Audubon is the largest nature-based conservation organization in New England.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 | Trust For Public Landtpl.org HQ: San Francisco, CA, United StatesReported employees: 201-500 | San Francisco, CA, United States | 201-500 | Exact match | 531 contacts → |
“Trust for Public Land (TPL) is a national nonprofit that works to connect everyone to the benefits and joys of the outdoors.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 | HQ: Washington, DC, United StatesReported employees: 51-200 | Washington, DC, United States | 51-200 | Exact match | 303 contacts → |
“Named a USA Top Workplace in 2023** For a century, National Parks Conservation Association has been a powerful independent voice working to strengthen and protect America's…” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 | Land Trust Alliancelandtrustalliance.org HQ: Washington, DC, United StatesReported employees: 51-200 | Washington, DC, United States | 51-200 | Exact match | 108 contacts → |
“The Land Trust Alliance is the voice of the land trust community.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 | Natural Landsnatlands.org HQ: Media, PA, United StatesReported employees: 51-200 | Media, PA, United States | 51-200 | Exact match | 80 contacts → |
“Natural Lands is dedicated to preserving and nurturing nature’s wonders while creating opportunities for joy and discovery in the outdoors for everyone.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 | Anne Springs Close Greenwayascgreenway.org HQ: Fort Mill, SC, United StatesReported employees: 201-500 | Fort Mill, SC, United States | 201-500 | Exact match | 77 contacts → |
“In 1995, the Anne Springs Close Greenway, a 2,100 acre nature preserve in Fort Mill, South Carolina, was dedicated to the public to serve as a natural buffer from urban…” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 | Peninsula Open Space Trust Postopenspacetrust.org HQ: Palo Alto, CA, United StatesReported employees: 51-200 | Palo Alto, CA, United States | 51-200 | Exact match | 75 contacts → |
“Our Mission: POST protects open space on the Peninsula and in the South Bay for the benefit of all.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 | Delaware Nature Societydelnature.org HQ: Hockessin, DE, United StatesReported employees: 51-200 | Hockessin, DE, United States | 51-200 | Exact match | 64 contacts → |
“Founded in 1964, Delaware Nature Society works to improve the environment through conservation, advocacy, and education.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 | Mchenry County Conservation Districtmccdistrict.org HQ: Woodstock, IL, United StatesReported employees: 51-200 | Woodstock, IL, United States | 51-200 | Exact match | 63 contacts → |
“McHenry County Conservation District exists to preserve, restore and manage natural areas and open spaces for their intrinsic value and for the benefits to present and future…” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 | Openlandsopenlands.org HQ: Chicago, IL, United StatesReported employees: 11-50 | Chicago, IL, United States | 11-50 | Exact match | 60 contacts → |
“As innovative protectors and stewards of the land since 1963, Openlands exists to create access to nature for all.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 | Western Reserve Land Conservancywrlandconservancy.org HQ: Moreland Hills, OH, United StatesReported employees: 11-50 | Moreland Hills, OH, United States | 11-50 | Exact match | 52 contacts → |
“Join the Western Reserve Land Conservancy Group for current updates and discussions!” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 | Sequoia Riverlands Trustsequoiariverlands.org HQ: Visalia, CA, United StatesReported employees: 11-50 | Visalia, CA, United States | 11-50 | Exact match | 43 contacts → |
“Sequoia Riverlands Trust conserves the lands and waters of California's heartland.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 | Earthplaceearthplace.org HQ: Westport, CT, United StatesReported employees: 51-200 | Westport, CT, United States | 51-200 | Exact match | 42 contacts → |
“Where nature education, conservation, and science meet.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 | Society For The Protection Of NEW Hampshire Forestsforestsociety.org HQ: Concord, NH, United StatesReported employees: 11-50 | Concord, NH, United States | 11-50 | Exact match | 42 contacts → |
“Since 1901, the Society for the Protection of New Hampshire Forests has worked to establish permanent conservation areas and promote the wise stewardship of private lands.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 | Rocky Mountain Conservancyrmconservancy.org HQ: Estes Park, CO, United StatesReported employees: 11-50 | Estes Park, CO, United States | 11-50 | Exact match | 42 contacts → |
“Rocky Mountain Conservancy is the primary nonprofit partner of Rocky Mountain National Park and similar lands across Colorado and Wyoming.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 | The Conservation Foundationtheconservationfoundation.org HQ: Naperville, IL, United StatesReported employees: 11-50 | Naperville, IL, United States | 11-50 | Exact match | 41 contacts → |
“We improve the health of our communities by preserving and restoring natural areas and open space, protecting rivers and watersheds, and promoting stewardship of our environment.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 | Heritage Conservancyheritageconservancy.org HQ: Doylestown, PA, United StatesReported employees: 11-50 | Doylestown, PA, United States | 11-50 | Exact match | 41 contacts → |
“Heritage Conservancy’s mission is to protect and care for the lands of our region, to engage with and share the history that unfolded on these lands, and to connect people with…” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 | Minnesota Land Trustmnland.org HQ: St. Paul, MN, United StatesReported employees: 11-50 | St. Paul, MN, United States | 11-50 | Exact match | 39 contacts → |
“The Minnesota Land Trust is a private, nonprofit organization that works across Minnesota with private landowners and partners to permanently protect land and shoreline and…” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 | Orange County Parksocparks.com HQ: Irvine, CA, United StatesReported employees: 501-1,000 | Irvine, CA, United States | 501-1,000 | Exact match | 39 contacts → |
“OC Parks encompasses regional, wilderness and historical facilities, as well as coastal areas throughout the County of Orange in California.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 | HQ: Pittsburgh, PA, United StatesReported employees: 11-50 | Pittsburgh, PA, United States | 11-50 | Exact match | 38 contacts → |
“The Pennsylvania Environmental Council (PEC) protects and restores the natural and built environments through innovation, collaboration, education and advocacy.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 | The Wildlands Conservancywildlandsconservancy.org HQ: Oak Glen, CA, United StatesReported employees: 51-200 | Oak Glen, CA, United States | 51-200 | Exact match | 38 contacts → |
“Founded in 1995, The Wildlands Conservancy (TWC) is dedicated to preserving the beauty and biodiversity of the earth and providing programs so that children may know the wonder…” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 | Ruffed Grouse Society & American Woodcock Societyruffedgrousesociety.org HQ: Coraopolis, PA, United StatesReported employees: 11-50 | Coraopolis, PA, United States | 11-50 | Exact match | 36 contacts → |
“Ruffed Grouse Society & American Woodcock Society unite conservationists to improve wildlife habitat and forest health.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 | Conserving Carolinaconservingcarolina.org HQ: Hendersonville, NC, United StatesReported employees: 11-50 | Hendersonville, NC, United States | 11-50 | Exact match | 36 contacts → |
“Conserving Carolina (formerly Carolina Mountain Land Conservancy and Pacolet Area Conservancy) is dedicated to protecting and stewarding land and water resources vital to our…” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 | HQ: Rancho Palos Verdes, CA, United StatesReported employees: 11-50 | Rancho Palos Verdes, CA, United States | 11-50 | Exact match | 36 contacts → |
“OUR MISSION: To preserve land and restore habitat for the education and enjoyment of all.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 25 of 348 company matches
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Open space preservation organizations: dataset insights
September 20, 2026These summaries describe recorded coverage in this saved dataset. This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Reported company sizes
345 records in the displayed employee bands.
3 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 348 companies.
How this company list was built
Describe a niche in your own words: companies installing commercial solar, or manufacturers of sustainable packaging. RevenueBase SmartSearch finds companies whose compiled business descriptions match by meaning. This list is one saved example to adapt.
Where the company descriptions come from
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
RevenueBase SmartSearch matching settings
- Exact
- Closest fits to the business described.
- Similar
- Similar businesses with a wider range of fits.
- Related
- Related businesses in and around the category.
- Broad
- A broader set of businesses connected to the description.
RevenueBase SmartSearch · Exact match identifies inclusion in this search's closest semantic matching setting. It is not a per-company confidence score, a literal keyword match, or a quality endorsement.
Selection, ordering and scope
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Recorded company descriptions support research; check company websites for current services. The selected preview is ordered by tracked contacts and is not a list of the best service providers.
Snapshot: September 20, 2026.
RevenueBase is a B2B data infrastructure company. Its September 3, 2026 published methodology describes a graph of 60 million companies and 398.9 million professional contacts; these platform figures differ from this page's totals. Published methodology ↗
Questions about this company list
What does Exact match mean for open space preservation organizations?
The separate RevenueBase SmartSearch column identifies inclusion at the closest semantic matching preset. It is not a literal keyword match, a per-company confidence score or a quality endorsement. Changing the search form opens a new search in RevenueBase; it does not reclassify these saved rows.
How many open space preservation organizations did RevenueBase find based in the United States?
The saved snapshot records 348 matching company records, 5,788 tracked contacts and 2,557 verified emails. The public preview displays 25 selected records.
Where do the company descriptions come from?
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
How are the public companies ordered?
The selected public records are ordered by contacts tracked in RevenueBase, highest first. Contact coverage is a prospecting measure, not an assessment of the company's services or quality.
How can I get contact information?
Select a company's contact count to open its filtered contacts in RevenueBase. Free signup is required and includes 500 credits and limited free results. Verified emails, direct dials and mobile numbers depend on available coverage.
How current is this list?
Snapshot: September 20, 2026. Review each company's website for current services and locations. A recorded business description does not establish that every company offers every service named in the search.
What do headquarters and employee bands mean?
These are recorded company-level fields, rather than a map of every branch or a count of specialists. Missing headquarters or employee bands are labeled; older records may show a location separately from recorded headquarters.
Build your next target company list
Adapt this niche search and work with available contacts in RevenueBase.
Related lists
Cite this list
RevenueBase Data Team. Top 25 open space preservation organizations based in the United States. Snapshot: September 20, 2026. https://revenuebase.ai/companies/open-space-preservation-organizations/united-states.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗
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