Company lists · Data refreshed September 2026
Top 25 Historic preservation societies based in the United States
RevenueBase identified 264 historic preservation societies headquartered in the United States as of September 2026 and tracks 2,611 professional contacts across them, including 1,097 with verified work emails. Washington is the largest hub.
This list covers historic preservation societies headquartered in the United States, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 20, 2026.
Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, 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 historic preservation societies based in the United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 463 contacts → | ||||
Indirect evidence “Founded by landscape architect Charles Eliot in 1891, The Trustees has, for more than 125 years, been a catalyst for important ideas, endeavors, and progress in Massachusetts.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 2 | 338 contacts → | ||||
Strong evidence “For more than 75 years, the National Trust for Historic Preservation has led the movement to safeguard America’s historic places.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 3 | 268 contacts → | ||||
Partial evidence “Since 1846, the Wisconsin Historical Society has been on a mission to connect people to the past by collecting, preserving and sharing stories.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 4 | 84 contacts → | ||||
Partial evidence “GBX Group LLC specializes in preserving and operating historic real estate in urban markets.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 5 | 57 contacts → | ||||
Strong evidence “Since 1889, Preservation Virginia has preserved historic places and raised awareness of the importance of perpetuating and revitalizing Virginia's cultural, architectural and…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 6 | 42 contacts → | ||||
Indirect evidence “A private nonprofit supported by a diverse membership base and guided by a volunteer board, Indiana Landmarks revitalizes communities, strengthens connections to our diverse…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 7 | 30 contacts → | ||||
Partial evidence “In November 1961, a small group of individuals intent on saving the Ainsley Hall House from demolition officially incorporated as the Historic Columbia.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 8 | 28 contacts → | ||||
Indirect evidence “The Martin House, designed and built from 1903-05, is considered by Wright scholars to be a significant turning point in the evolution of the Prairie house concept.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 9 | 27 contacts → | ||||
Strong evidence “linktr.ee/thehistorictrust Mission:To inspire civic pride through education, preservation and celebration of our community’s history.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 10 | 25 contacts → | ||||
Partial evidence “HistoriCorps is a 501(c)(3) nonprofit that provides volunteers of all skill levels with a hands-on experience preserving historic structures on public lands across America.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 11 | 24 contacts → | ||||
Strong evidence “Founded in 1971, Landmarks Illinois is the state’s leading voice for historic preservation.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 12 | 23 contacts → | ||||
Strong evidence “The Pittsburgh History & Landmarks Foundation was founded in 1964 by a group of citizens who passionately believed that historic preservation, rather than massive demolition…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 13 | 23 contacts → | ||||
Indirect evidence “Docomomo is an acronym for the DOcumentation and COnservation of buildings, sites and neighborhoods of the MOdern MOvement.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 14 | 22 contacts → | ||||
Indirect evidence “The National Society of The Colonial Dames of America promotes appreciation for the people, places and events that led to the formation and development of our country.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 15 | 21 contacts → | ||||
Partial evidence “The Los Angeles Conservancy is a private, member-based nonprofit devoted to preserving, revitalizing, and celebrating the historic places that make Greater Los Angeles unique.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 16 | 21 contacts → | ||||
Partial evidence “The PRC is dedicated to the preservation of New Orleans’ unique and diverse neighborhoods, its authentic culture and its singular joie de vivre.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 17 | 18 contacts → | ||||
Strong evidence “The mission of The Georgia Trust for Historic Preservation is to work for the preservation and revitalization of Georgia's diverse historic resources and advocate their…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 18 | 17 contacts → | ||||
Indirect evidence “The New York Landmarks Conservancy is dedicated to celebrating, preserving, and protecting the iconic buildings and unique neighborhoods that help define our vibrant and…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 19 | 16 contacts → | ||||
Partial evidence “Historic Denver, Inc.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 20 | 16 contacts → | ||||
Strong evidence “Pasadena Heritage is a nonprofit historic preservation organization, founded in 1977 and dedicated to preserving Pasadena's historic resources through educational programs and…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 21 | 16 contacts → | ||||
Indirect evidence “The Archaeological Conservancy, established in 1980, is the only national non-profit organization dedicated to acquiring and preserving the best of our nation's remaining…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 22 | 15 contacts → | ||||
Partial evidence “The Providence Preservation Society (PPS) was established in 1956 to respond to the proposed demolition of a number of 18th- and early 19th-century houses on College Hill in…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 23 | 15 contacts → | ||||
Strong evidence “The mission of Colorado Preservation, Inc, founded in 1984, is to promote historic preservation in our State by providing information, education, training, expertise and advocacy.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 24 | 14 contacts → | ||||
Strong evidence “Founded in 1939, Preservation North Carolina is North Carolina's only private nonprofit statewide historic preservation organization.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 25 | 13 contacts → | ||||
Indirect evidence “We are Rethos, a 501(c)(3) nonprofit organization working nationwide for the use of old buildings and sites.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
RevenueBase Smart Search
RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: historic preservation societies. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.
- Strong evidence
- The company's own public description of its business names historic preservation societies.
- Partial evidence
- Its own public description names part of historic preservation societies, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name historic preservation societies. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.
RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.
Showing 25 of 264 historic preservation societies based in the United States
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Historic preservation societies 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 264 companies.
How this list was built
Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among historic preservation societies, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.
- Source
- The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
- What qualifies
- Companies headquartered in the United States whose own description of what they do matches “historic preservation societies”. Matching reads each company's description, not its industry code or its name.
- RevenueBase Smart Search
- RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names historic preservation societies), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
- What we exclude
- Companies whose own description does not clearly place them among historic preservation societies, and records with no verified work email. Companies headquartered outside United States are excluded even when they keep an office there.
- Match quality
- In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
- 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 listed company carries at least one verified work email, 1,097 across the full list. 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.
- Corrections
- Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.
Frequently asked
What is RevenueBase Smart Search?
RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names historic preservation societies, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.
How many historic preservation societies are there based in the United States?
RevenueBase identified 264 historic preservation societies headquartered in the United States as of September 2026, matched on each company's own description of what it does rather than its industry code.
What is the largest company on this list?
The Trustees Of Reservations, headquartered in Boston, tops this list with the largest team on record.
Which city has the most historic preservation societies?
Washington leads with 9 headquartered companies, followed by New York (7) and Boston (5).
How do I get contact information for these companies?
A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 1,097 verified decision-maker contacts tracked across these 264 companies.
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.
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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 Smart Search, 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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