Company lists · Data refreshed September 2026

Top 25 Environmental education nonprofits based in the United States

Name: Environmental education nonprofits based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 19, 2026 1,976 companies tracked

RevenueBase identified 1,976 company matches for environmental education nonprofits associated with the United States as of September 2026 and tracks 31,804 professional contacts across them, including 10,941 with verified work emails. New York is the largest hub.

This list covers company matches for environmental education nonprofits 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 19, 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.

How to read this list RevenueBase SmartSearch · Exact Recorded Sep 19, 2026 How this list was built

1,976Companies

31,804Contacts tracked

10,941Verified emails

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The 25 largest environmental education nonprofits based in the United States

Ranked by team size

Top 25 of 1,976 company matches for environmental education nonprofits based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 19, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	The Nature Conservancy	Exact match	Arlington, VA, United StatesHQ recorded Sep 19, 2026	5,001-10,000	6,526 contacts →
	Exact match “Air, water, food, shelter, income: nature sustains every aspect of our lives.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
2	Natural Resources Defense Council Nrdc	Exact match	New York, NY, United StatesHQ recorded Sep 19, 2026	501-1,000	942 contacts →
	Exact match “NRDC is the nation's most effective environmental action organization.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
3	Student Conservation Association	Exact match	Arlington, VA, United StatesHQ recorded Sep 19, 2026	201-500	795 contacts →
	Exact match “The Student Conservation Association (SCA) is the largest provider of hands-on environmental conservation programs for youth and adults.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
4	Mass Audubon	Exact match	Lincoln, MA, United StatesHQ recorded Sep 19, 2026	201-500	554 contacts →
	Exact match “Mass Audubon is the largest nature-based conservation organization in New England.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
5	Unity Environmental University	Exact match	New Gloucester, ME, United StatesHQ recorded Sep 19, 2026	51-200	527 contacts →
	Exact match “For more than fifty years, Unity Environmental University has been preparing the next generation of environmental professionals and leaders to successfully face real-world…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
6	RARE	Exact match	Arlington, VA, United StatesHQ recorded Sep 19, 2026	51-200	368 contacts →
	Exact match “Rare is a global leader in driving social change for people and nature.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
7	University Of Washington, Environmental Studies	Exact match	Seattle, WA, United StatesHQ recorded Sep 19, 2026	n/a	244 contacts →
	Exact match “The Program on the Environment is an innovative experiment in interdisciplinary environmental education combining natural science, the human dimension, and community-based…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
8	Seaside Sustainability	Exact match	Gloucester, MA, United StatesHQ recorded Sep 19, 2026	51-200	240 contacts →
	Exact match “Seaside Sustainability is a nationally recognized, award-winning 501(c)3 charitable organization dedicated to community engagement, education and environmental conservation.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
9	The Conservation Fund	Exact match	Arlington, VA, United StatesHQ recorded Sep 19, 2026	201-500	224 contacts →
	Exact match “We are in the business of conservation, creating innovative solutions that drive nature-based action for climate protection, sustainable economies and vibrant communities.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
10	Conservation Corps Minnesota & Iowa	Exact match	St. Paul, MN, United StatesHQ recorded Sep 19, 2026	201-500	207 contacts →
	Exact match “At Conservation Corps Minnesota & Iowa, youth and young adults grow as environmental stewards and leaders while giving back to the community through meaningful service.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
11	Montana Conservation Corps	Exact match	Bozeman, MT, United StatesHQ recorded Sep 19, 2026	n/a	193 contacts →
	Exact match “Montana Conservation Corps is a nonprofit organization whose mission is to inspire young people, through hands-on conservation service to be leaders, stewards of the land, and…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
12	Naturebridge	Exact match	Sausalito, CA, United StatesHQ recorded Sep 19, 2026	201-500	188 contacts →
	Exact match “Environmental science in nature’s classroom NatureBridge provides hands-on environmental science programs for young people.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
13	Grownyc	Exact match	New York, NY, United StatesHQ recorded Sep 19, 2026	51-200	185 contacts →
	Exact match “GrowNYC is a hands-on non-profit with a mission to empower all New Yorkers with equitable access to fresh, locally grown food and neighborhood green spaces, reduce waste, and care…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
14	Conservation LAW Foundation	Exact match	Boston, MA, United StatesHQ recorded Sep 19, 2026	51-200	174 contacts →
	Exact match “Since 1966, CLF has taken on powerful opponents who would pollute our air and water and squander our resources.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
15	Holden Forests & Gardens	Exact match	Kirtland, OH, United StatesHQ recorded Sep 19, 2026	51-200	156 contacts →
	Exact match “Holden Forests & Gardens is made up of two of Northeast Ohio’s most important environmental and cultural institutions, the Holden Arboretum and Cleveland Botanical Garden, whose…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
16	Seeds Ecology & Education Centers	Exact match	Traverse City, MI, United StatesHQ recorded Sep 19, 2026	51-200	146 contacts →
	Exact match “We are a 501c3 nonprofit organization established to foster local solutions to global issues.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
17	earthday.org	Exact match	Washington, DC, United StatesHQ recorded Sep 19, 2026	11-50	144 contacts →
	Exact match “EARTHDAY.ORG’s mission is to diversify, educate and activate the environmental movement worldwide.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
18	Ecology Action	Exact match	Santa Cruz, CA, United StatesHQ recorded Sep 19, 2026	51-200	140 contacts →
	Exact match “Ecology Action is an award-winning California 501(c)(3) non-profit that’s been inspiring sustainable community actions since 1970.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
19	The School For Field Studies	Exact match	Beverly, MA, United StatesHQ recorded Sep 19, 2026	51-200	139 contacts →
	Exact match “The School for Field Studies (SFS) is a unique 501c3 nonprofit academic institution headquartered in Beverly, MA.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
20	Treepeople	Exact match	Beverly Hills, CA, United StatesHQ recorded Sep 19, 2026	51-200	136 contacts →
	Exact match “As the Los Angeles region faces severe impacts from climate change, TreePeople unites the power of trees, people and nature-based solutions to grow a more climate-ready city.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
21	Environmental Charter Schools	Exact match	Redondo Beach, CA, United StatesHQ recorded Sep 19, 2026	51-200	130 contacts →
	Exact match “Environmental Charter Schools (ECS) is an innovative network of free public schools serving South Los Angeles.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
22	KUPU	Exact match	Honolulu, HI, United StatesHQ recorded Sep 19, 2026	51-200	127 contacts →
	Exact match “Much like the Kupukupu Fern, which is one of the first plants to bring life back to the land after a devastating lava flow, Kupu’s heart is to bring life back to the people, land…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
23	SEI	Exact match	San Rafael, CA, United StatesHQ recorded Sep 19, 2026	51-200	127 contacts →
	Exact match “SEI is an environmental nonprofit that builds leaders to accelerate climate solutions.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
24	Teton Science Schools	Exact match	Jackson, WY, United StatesHQ recorded Sep 19, 2026	51-200	118 contacts →
	Exact match “Teton Science Schools connects people, place, and nature through education.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
25	Islandwood	Exact match	Bainbridge Island, WA, United StatesHQ recorded Sep 19, 2026	51-200	112 contacts →
	Exact match “As an environmental education nonprofit, we believe there are many paths to creating a more sustainable and equitable world.” Recorded in the RevenueBase company graph · Sep 19, 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 “environmental education nonprofits”. 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 1,976 environmental education nonprofits based in the United States

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Environmental education nonprofits based in the United States at a glance

As of Sep 19, 2026

34.4%Verified-email coverage

16.1Average contacts per company

1-10Median size (employees)

3.2%Largest-city concentration · New York

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

1,346

11-50

481

51-200

108

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

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 1,976 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 “environmental education nonprofits” 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 10,941 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 19, 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.

Environmental education nonprofits by metro

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 “environmental education nonprofits”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many environmental education nonprofits are there based in the United States?

RevenueBase identified 1,976 company matches for environmental education nonprofits 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?

The Nature Conservancy tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most environmental education nonprofits?

New York leads with 63 company records, followed by Washington (62) and Los Angeles (36).

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 10,941 professional contacts with verified work emails tracked across these 1,976 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 19, 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 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.