Company lists · Data refreshed September 2026

Top 25 Civic environmental organizations based in the United States

Name: Civic environmental organizations 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 977 companies tracked

RevenueBase identified 977 civic environmental organizations headquartered in the United States as of September 2026 and tracks 16,693 professional contacts across them, including 6,052 with verified work emails. New York is the largest hub.

This list covers civic environmental organizations 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 19, 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.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 19, 2026 86% judged on-target in blind review

977Companies

16,693Contacts tracked

6,052Verified emails

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The 25 largest civic environmental organizations based in the United States

Ranked by team size

Top 25 of 977 civic environmental organizations based in the United States, ranked by team size, largest first. Data refreshed Sep 19, 2026. RevenueBase Smart Search rates how each company's information relates to civic environmental organizations: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Environmental Defense Fund	Partial evidence	New York, NY, United StatesHQ checked Sep 19, 2026	1,001-5,000	1,352 contacts →
	Partial evidence “We are Environmental Defense Fund, a leading environmental nonprofit focused on stabilizing the climate while helping build strong and healthy communities.” Source: RevenueBase Database · checked Sep 19, 2026
2	Casa Familiar	Indirect evidence	Albuquerque, NM, United StatesHQ checked Sep 19, 2026	n/a	1,132 contacts →
	Indirect evidence “Casa Familiar is a primary/secondary education company based out of 501 Atrisco Dr Sw, Albuquerque, New Mexico, United States.” Source: RevenueBase Database · checked Sep 19, 2026
3	Natural Resources Defense Council Nrdc	Partial evidence	New York, NY, United StatesHQ checked Sep 19, 2026	501-1,000	942 contacts →
	Partial evidence “NRDC is the nation's most effective environmental action organization.” Source: RevenueBase Database · checked Sep 19, 2026
4	The Providencia Group	Indirect evidence	Ashburn, VA, United StatesHQ checked Sep 19, 2026	201-500	444 contacts →
	Indirect evidence “At Providencia we are focused on positively impacting the communities where we operate, the lives of vulnerable and underserved populations around the world, and the health of our…” Source: RevenueBase Database · checked Sep 19, 2026
5	RARE	Indirect evidence	Arlington, VA, United StatesHQ checked Sep 19, 2026	51-200	368 contacts →
	Indirect evidence “Rare is a global leader in driving social change for people and nature.” Source: RevenueBase Database · checked Sep 19, 2026
6	Union Of Concerned Scientists	Indirect evidence	Cambridge, MA, United StatesHQ checked Sep 19, 2026	201-500	254 contacts →
	Indirect evidence “Our mission is to use rigorous, independent science to solve our planet's most pressing problems.” Source: RevenueBase Database · checked Sep 19, 2026
7	Better Earth	Indirect evidence	Tampa, FL, United StatesHQ checked Sep 19, 2026	201-500	244 contacts →
	Indirect evidence “We are creating a more sustainable and better earth through solar energy.” Source: RevenueBase Database · checked Sep 19, 2026
8	Ceres, INC	Indirect evidence	Boston, MA, United StatesHQ checked Sep 19, 2026	51-200	241 contacts →
	Indirect evidence “Ceres is a nonprofit advocacy organization working to accelerate the transition to a cleaner, more just, and resilient world.” Source: RevenueBase Database · checked Sep 19, 2026
9	Seaside Sustainability	Partial evidence	Gloucester, MA, United StatesHQ checked Sep 19, 2026	51-200	240 contacts →
	Partial evidence “Seaside Sustainability is a nationally recognized, award-winning 501(c)3 charitable organization dedicated to community engagement, education and environmental conservation.” Source: RevenueBase Database · checked Sep 19, 2026
10	The Conservation Fund	Indirect evidence	Arlington, VA, United StatesHQ checked Sep 19, 2026	201-500	224 contacts →
	Indirect evidence “We are in the business of conservation, creating innovative solutions that drive nature-based action for climate protection, sustainable economies and vibrant communities.” Source: RevenueBase Database · checked Sep 19, 2026
11	League Of Conservation Voters	Indirect evidence	Washington, DC, United StatesHQ checked Sep 19, 2026	51-200	218 contacts →
	Indirect evidence “LCV believes our earth is worth fighting for because everyone has a right to clean air, water, and a safe, healthy community.” Source: RevenueBase Database · checked Sep 19, 2026
12	Conservation Corps Minnesota & Iowa	Partial evidence	St. Paul, MN, United StatesHQ checked Sep 19, 2026	201-500	207 contacts →
	Partial evidence “At Conservation Corps Minnesota & Iowa, youth and young adults grow as environmental stewards and leaders while giving back to the community through meaningful service.” Source: RevenueBase Database · checked Sep 19, 2026
13	Grownyc	Indirect evidence	New York, NY, United StatesHQ checked Sep 19, 2026	51-200	185 contacts →
	Indirect evidence “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…” Source: RevenueBase Database · checked Sep 19, 2026
14	Conservation LAW Foundation	Indirect evidence	Boston, MA, United StatesHQ checked Sep 19, 2026	51-200	174 contacts →
	Indirect evidence “Since 1966, CLF has taken on powerful opponents who would pollute our air and water and squander our resources.” Source: RevenueBase Database · checked Sep 19, 2026
15	Goodwill Of The Finger Lakes	Indirect evidence	Rochester, NY, United StatesHQ checked Sep 19, 2026	501-1,000	154 contacts →
	Indirect evidence “Elevating people, community, and planet for a good today and better tomorrow.” Source: RevenueBase Database · checked Sep 19, 2026
16	earthday.org	Partial evidence	Washington, DC, United StatesHQ checked Sep 19, 2026	11-50	144 contacts →
	Partial evidence “EARTHDAY.ORG’s mission is to diversify, educate and activate the environmental movement worldwide.” Source: RevenueBase Database · checked Sep 19, 2026
17	Ecology Action	Indirect evidence	Santa Cruz, CA, United StatesHQ checked Sep 19, 2026	51-200	140 contacts →
	Indirect evidence “Ecology Action is an award-winning California 501(c)(3) non-profit that’s been inspiring sustainable community actions since 1970.” Source: RevenueBase Database · checked Sep 19, 2026
18	Treepeople	Indirect evidence	Beverly Hills, CA, United StatesHQ checked Sep 19, 2026	51-200	136 contacts →
	Indirect evidence “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.” Source: RevenueBase Database · checked Sep 19, 2026
19	Environmental LAW Institute	Partial evidence	Washington, DC, United StatesHQ checked Sep 19, 2026	11-50	102 contacts →
	Partial evidence “The Environmental Law Institute (ELI) makes law work for people, places, and the planet.” Source: RevenueBase Database · checked Sep 19, 2026
20	Solar ONE	Partial evidence	Long Island City, NY, United StatesHQ checked Sep 19, 2026	51-200	99 contacts →
	Partial evidence “Solar One is a non-profit, environmental education organization that fosters sustainable practices and environmental equity across New York City.” Source: RevenueBase Database · checked Sep 19, 2026
21	Leroy Springs & Company	Indirect evidence	Fort Mill, United StatesHQ checked Sep 19, 2026	201-500	98 contacts →
	Indirect evidence “Leroy Springs & Co.” Source: RevenueBase Database · checked Sep 19, 2026
22	Ecotrust	Partial evidence	Portland, OR, United StatesHQ checked Sep 19, 2026	51-200	97 contacts →
	Partial evidence “Ecotrust's mission is to inspire fresh thinking that creates economic opportunity, social equity, and environmental well-being.” Source: RevenueBase Database · checked Sep 19, 2026
23	Urban Ecology Center	Partial evidence	Milwaukee, WI, United StatesHQ checked Sep 19, 2026	51-200	93 contacts →
	Partial evidence “Our vision is to inspire generations to build environmental curiosity, understanding, and respect.” Source: RevenueBase Database · checked Sep 19, 2026
24	Environment America	Indirect evidence	Denver, CO, United StatesHQ checked Sep 19, 2026	51-200	93 contacts →
	Indirect evidence “Every day, we see more heartbreaking evidence of the damage being done to our planet: climate change, plastic pollution, wildlife disappearing forever.” Source: RevenueBase Database · checked Sep 19, 2026
25	The Water Institute	Partial evidence	Baton Rouge, LA, United StatesHQ checked Sep 19, 2026	51-200	92 contacts →
	Partial evidence “The Water Institute is an independent, non-profit, applied research institution advancing science and developing integrated methods to solve complex environmental and societal…” Source: RevenueBase Database · checked Sep 19, 2026

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: civic environmental organizations. 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 civic environmental organizations.
Partial evidence: Its own public description names part of civic environmental organizations, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name civic environmental organizations. 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 977 civic environmental organizations based in the United States

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Civic environmental organizations based in the United States at a glance

As of Sep 19, 2026

36.3%Verified-email coverage

17.1Average contacts per company

1-10Median size (employees)

3.4%Largest-city concentration · New York

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

659

11-50

242

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

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 977 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 civic environmental organizations, 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 “civic environmental organizations”. 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 civic environmental organizations), 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 civic environmental organizations, 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, 6,052 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 19, 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.

Civic environmental organizations by metro

Civic environmental organizations in New York33
Civic environmental organizations in Washington28

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 civic environmental organizations, 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 civic environmental organizations are there based in the United States?

RevenueBase identified 977 civic environmental organizations 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?

Environmental Defense Fund, headquartered in New York, tops this list with the largest team on record.

Which city has the most civic environmental organizations?

New York leads with 33 headquartered companies, followed by Washington (28) and Los Angeles (22).

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 6,052 verified decision-maker contacts tracked across these 977 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 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 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.