Company lists · Data refreshed September 2026

Top 25 Conservation organizations based in Washington, United States

Name: Conservation organizations based in Washington, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 19, 2026 97 companies tracked

RevenueBase identified 97 conservation organizations headquartered in Washington, United States as of September 2026 and tracks 6,023 professional contacts across them, including 2,291 with verified work emails. Washington is the largest hub.

This list covers conservation organizations headquartered in Washington, 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

97Companies

6,023Contacts tracked

2,291Verified emails

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The 25 largest conservation organizations based in Washington, United States

Ranked by team size

Top 25 of 97 conservation organizations based in Washington, United States, ranked by team size, largest first. Data refreshed Sep 19, 2026. RevenueBase Smart Search rates how each company's information relates to conservation 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	World Wildlife Fund	Strong evidence	Washington, DC, United StatesHQ checked Sep 19, 2026	1,001-5,000	1,290 contacts →
	Strong evidence “Our planet faces many big conservation challenges.” Source: RevenueBase Database · checked Sep 19, 2026
2	IFAW	Indirect evidence	Washington, DC, United StatesHQ checked Sep 19, 2026	201-500	355 contacts →
	Indirect evidence “IFAW explores new ways to improve conditions for animals, people, and the place we call home-and we’ve been leading the way for over 50 years.” Source: RevenueBase Database · checked Sep 19, 2026
3	National Parks Conservation Association	Strong evidence	Washington, DC, United StatesHQ checked Sep 19, 2026	51-200	303 contacts →
	Strong evidence “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…” Source: RevenueBase Database · checked Sep 19, 2026
4	American Farmland Trust	Strong evidence	Washington, DC, United StatesHQ checked Sep 19, 2026	51-200	255 contacts →
	Strong evidence “American Farmland Trust (AFT) began in 1980 after a small group of farmers and conservationists asked an important question: What will happen to the nation's food supply if we…” Source: RevenueBase Database · checked Sep 19, 2026
5	National Fish And Wildlife Foundation	Strong evidence	Washington, DC, United StatesHQ checked Sep 19, 2026	51-200	252 contacts →
	Strong evidence “The National Fish and Wildlife Foundation (NFWF) works with partners to foster sustainable and impactful conservation solutions so that people and nature thrive together.” Source: RevenueBase Database · checked Sep 19, 2026
6	The Jane Goodall Institute	Strong evidence	Washington, DC, United StatesHQ checked Sep 19, 2026	201-500	232 contacts →
	Strong evidence “The Jane Goodall Institute is a global, community-led conservation organization founded in 1977 that advances the vision and work of Dr.” Source: RevenueBase Database · checked Sep 19, 2026
7	Ocean Conservancy	Indirect evidence	Washington, DC, United StatesHQ checked Sep 19, 2026	51-200	227 contacts →
	Indirect evidence “Our ocean is truly awesome-but it is not invincible.” Source: RevenueBase Database · checked Sep 19, 2026
8	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
9	Defenders Of Wildlife	Indirect evidence	Washington, DC, United StatesHQ checked Sep 19, 2026	51-200	202 contacts →
	Indirect evidence “Defenders of Wildlife is dedicated to the protection of all native animals and plants in their natural communities.” Source: RevenueBase Database · checked Sep 19, 2026
10	The Wilderness Society	Strong evidence	Washington, DC, United StatesHQ checked Sep 19, 2026	51-200	199 contacts →
	Strong evidence “The Wilderness Society (TWS) is the leading conservation organization working to protect America’s wild places and public lands for the health of local communities, wildlife, and…” Source: RevenueBase Database · checked Sep 19, 2026
11	National Park Foundation	Indirect evidence	Washington, DC, United StatesHQ checked Sep 19, 2026	51-200	157 contacts →
	Indirect evidence “The National Park Foundation works to protect wildlife and park lands, preserve history and culture, educate and engage youth, and connect people everywhere to the wonder of parks.” Source: RevenueBase Database · checked Sep 19, 2026
12	American Rivers	Indirect evidence	Washington, DC, United StatesHQ checked Sep 19, 2026	51-200	147 contacts →
	Indirect evidence “American Rivers protects wild rivers, restores damaged rivers, and conserves clean water for people and nature.” Source: RevenueBase Database · checked Sep 19, 2026
13	earthday.org	Indirect evidence	Washington, DC, United StatesHQ checked Sep 19, 2026	11-50	144 contacts →
	Indirect evidence “EARTHDAY.ORG’s mission is to diversify, educate and activate the environmental movement worldwide.” Source: RevenueBase Database · checked Sep 19, 2026
14	American Forests	Strong evidence	Washington, DC, United StatesHQ checked Sep 19, 2026	51-200	136 contacts →
	Strong evidence “Founded in 1875, American Forests is the oldest national nonprofit conservation organization in the U.S.” Source: RevenueBase Database · checked Sep 19, 2026
15	Earthworks	Indirect evidence	Washington, DC, United StatesHQ checked Sep 19, 2026	11-50	126 contacts →
	Indirect evidence “EARTHWORKS is a nonprofit organization dedicated to protecting communities and the environment from the impacts of irresponsible mineral and energy development while seeking…” Source: RevenueBase Database · checked Sep 19, 2026
16	American Forest Foundation	Strong evidence	Washington, DC, United StatesHQ checked Sep 19, 2026	51-200	118 contacts →
	Strong evidence “The American Forest Foundation (AFF) is a national conservation organization that works to deliver clean water, wildlife habitat, carbon sequestration and storage, and sustainable…” Source: RevenueBase Database · checked Sep 19, 2026
17	Land Trust Alliance	Indirect evidence	Washington, DC, United StatesHQ checked Sep 19, 2026	51-200	108 contacts →
	Indirect evidence “The Land Trust Alliance is the voice of the land trust community.” Source: RevenueBase Database · checked Sep 19, 2026
18	Greenpeace USA	Indirect evidence	Washington, DC, United StatesHQ checked Sep 19, 2026	51-200	97 contacts →
	Indirect evidence “Founded in 1971, Greenpeace began when a small group of activists sailed from Vancouver to protest nuclear testing at Amchitka, Alaska.” Source: RevenueBase Database · checked Sep 19, 2026
19	Forest Trends Association	Indirect evidence	Washington, DC, United StatesHQ checked Sep 19, 2026	11-50	76 contacts →
	Indirect evidence “Forest Trends works to conserve forests and other ecosystems through the creation and wide adoption of a range of environmental finance, market, and other payment and incentive…” Source: RevenueBase Database · checked Sep 19, 2026
20	Society For Conservation Biology	Strong evidence	Washington, DC, United StatesHQ checked Sep 19, 2026	11-50	70 contacts →
	Strong evidence “For almost 35 years, the Society for Conservation Biology (SCB) has proudly served as the premier international organization of professionals and students who dedicate their work…” Source: RevenueBase Database · checked Sep 19, 2026
21	Conservation Strategy Fund	Strong evidence	Washington, DC, United StatesHQ checked Sep 19, 2026	11-50	69 contacts →
	Strong evidence “Conservation Strategy Fund (CSF) sustains natural ecosystems and human communities through strategies powered by conservation economics.” Source: RevenueBase Database · checked Sep 19, 2026
22	Theodore Roosevelt Conservation Partnership	Strong evidence	Washington, DC, United StatesHQ checked Sep 19, 2026	11-50	55 contacts →
	Strong evidence “In 1912 Theodore Roosevelt said, “There can be no greater issue than that of conservation in this country.” While in the political arena, he succeeded in making conservation a top…” Source: RevenueBase Database · checked Sep 19, 2026
23	Amazon Conservation	Strong evidence	Washington, DC, United StatesHQ checked Sep 19, 2026	51-200	50 contacts →
	Strong evidence “Amazon Conservation is a 501(c)(3) non-profit organization that unites science, innovation, and community to protect the western Amazon - the greatest wild forest on Earth.” Source: RevenueBase Database · checked Sep 19, 2026
24	The Ocean Foundation	Strong evidence	Washington, DC, United StatesHQ checked Sep 19, 2026	11-50	46 contacts →
	Strong evidence “The Ocean Foundation is the gathering place for marine conservation donors and conservation entrepreneurs to advance global ocean solutions.” Source: RevenueBase Database · checked Sep 19, 2026
25	Mighty Earth	Indirect evidence	Washington, DC, United StatesHQ checked Sep 19, 2026	11-50	44 contacts →
	Indirect evidence “Mighty Earth is a global environmental organization that works to make a lasting difference for the planet and its people with a focus on forests, sustainable agriculture, and…” 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: conservation 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 conservation organizations.
Partial evidence: Its own public description names part of conservation organizations, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name conservation 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 97 conservation organizations based in Washington, United States

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Conservation organizations based in Washington, United States at a glance

As of Sep 19, 2026

38.0%Verified-email coverage

62.1Average contacts per company

11-50Median size (employees)

100.0%Largest-city concentration · Washington

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

Email recency for this list is measured across the whole United States list rather than for Washington, so it is reported there. Company counts and contact totals on this page are exact for Washington, over 97 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 conservation 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 Washington, United States whose own description of what they do matches “conservation 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 conservation 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 conservation organizations, and records with no verified work email. Companies headquartered outside Washington 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, 2,291 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.

Conservation organizations by metro in the United States

Conservation organizations in Washington97
Conservation organizations in New York57
Conservation organizations in Portland47
Conservation organizations in San Francisco42
Conservation organizations in Denver36
Conservation organizations in Seattle33
Conservation organizations in Austin28
Conservation organizations in Atlanta26

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 conservation 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 conservation organizations are there based in Washington, United States?

RevenueBase identified 97 conservation organizations headquartered in Washington, 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?

World Wildlife Fund, headquartered in Washington, tops this list with the largest team on record.

Which city has the most conservation organizations?

Washington leads with 97 headquartered companies, followed by New York (57) and Portland (47).

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 2,291 verified decision-maker contacts tracked across these 97 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.