Company lists · Data refreshed September 2026

Top 25 Environmental research organizations based in Washington, United States

Name: Environmental research 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 107 companies tracked

RevenueBase identified 107 company matches for environmental research organizations associated with Washington, United States as of September 2026 and tracks 3,860 professional contacts across them, including 1,136 with verified work emails. Across the United States, Washington is the largest hub for this category.

This list covers company matches for environmental research organizations associated with Washington, 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

107Companies

3,860Contacts tracked

1,136Verified emails

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The 25 largest environmental research organizations based in Washington, United States

Ranked by team size

Top 25 of 107 company matches for environmental research organizations based in Washington, 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	World Resources Institute	Exact match	Washington, DC, United StatesHQ recorded Sep 19, 2026	1,001-5,000	1,359 contacts →
	Exact match “WRI works to improve people’s lives, protect and restore nature and stabilize the climate.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
2	The International Council On Clean Transportation	Exact match	Washington, DC, United StatesHQ recorded Sep 19, 2026	51-200	196 contacts →
	Exact match “The International Council on Clean Transportation is an independent nonprofit organization founded to provide first-rate, unbiased research and technical and scientific analysis…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
3	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
4	Resources For The Future	Exact match	Washington, DC, United StatesHQ recorded Sep 19, 2026	51-200	135 contacts →
	Exact match “Resources for the Future improves environmental, energy, and natural resource decisions through impartial economic research and policy engagement.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
5	Earthworks	Exact match	Washington, DC, United StatesHQ recorded Sep 19, 2026	11-50	126 contacts →
	Exact match “EARTHWORKS is a nonprofit organization dedicated to protecting communities and the environment from the impacts of irresponsible mineral and energy development while seeking…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
6	Environmental Working Group	Exact match	Washington, DC, United StatesHQ recorded Sep 19, 2026	51-200	120 contacts →
	Exact match “The Environmental Working Group is a non-profit, non-partisan organization dedicated to protecting human health and the environment.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
7	Environmental LAW Institute	Exact match	Washington, DC, United StatesHQ recorded Sep 19, 2026	11-50	102 contacts →
	Exact match “The Environmental Law Institute (ELI) makes law work for people, places, and the planet.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
8	Greenpeace USA	Exact match	Washington, DC, United StatesHQ recorded Sep 19, 2026	51-200	97 contacts →
	Exact match “Founded in 1971, Greenpeace began when a small group of activists sailed from Vancouver to protest nuclear testing at Amchitka, Alaska.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
9	Society Of Environmental Toxicology And Chemistry Setac	Exact match	Washington, DC, United StatesHQ recorded Sep 19, 2026	11-50	91 contacts →
	Exact match “The mission of the Society of Environmental Toxicology and Chemistry (SETAC) is to advance environmental science and management.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
10	Earthrights International	Exact match	Washington, DC, United StatesHQ recorded Sep 19, 2026	11-50	82 contacts →
	Exact match “EarthRights International is a nongovernmental, nonprofit organization that combines the power of law and the power of people in defense of earth rights.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
11	Forest Trends Association	Exact match	Washington, DC, United StatesHQ recorded Sep 19, 2026	11-50	76 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
12	Center For International Environmental LAW Ciel	Exact match	Washington, DC, United StatesHQ recorded Sep 19, 2026	51-200	74 contacts →
	Exact match “The Center for International Environmental Law (CIEL) uses the power of the law to protect the environment, promote human health, and ensure a just and sustainable society.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
13	Peer Consultants, P.C	Exact match	Washington, DC, United StatesHQ recorded Sep 19, 2026	51-200	71 contacts →
	Exact match “In 1978, PEER was established under Dr.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
14	ONE Health Trust	Exact match	Washington, DC, United StatesHQ recorded Sep 19, 2026	11-50	59 contacts →
	Exact match “We live in an interconnected world: the health and well-being of the environment, animals, and humans are intertwined in ways that are increasingly more apparent.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
15	Ecoamerica	Exact match	Washington, DC, United StatesHQ recorded Sep 19, 2026	11-50	53 contacts →
	Exact match “ecoAmerica grows the base of popular support for climate solutions in America with research-driven marketing, partnerships, and national programs that connect with Americans' core…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
16	Friends Of The Earth U.S	Exact match	Washington, DC, United StatesHQ recorded Sep 19, 2026	51-200	51 contacts →
	Exact match “Friends of the Earth is a bold and fearless voice for justice and the planet.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
17	Institute For Local Self-Reliance	Exact match	Washington, DC, United StatesHQ recorded Sep 19, 2026	11-50	46 contacts →
	Exact match “The Institute for Local Self-Reliance (ILSR) is a nonprofit research and educational organization that provides technical assistance and information on sustainable development…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
18	Mighty Earth	Exact match	Washington, DC, United StatesHQ recorded Sep 19, 2026	11-50	44 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
19	Environmental Integrity Project	Exact match	Washington, DC, United StatesHQ recorded Sep 19, 2026	11-50	40 contacts →
	Exact match “EIP combines research, reporting, and media outreach to spotlight illegal pollution, expose political intimidation of enforcement staff, and encourage federal and state agencies…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
20	Conservation Nation	Exact match	Washington, DC, United StatesHQ recorded Sep 19, 2026	n/a	39 contacts →
	Exact match “In the fight to save endangered animals and the planet, we need every smart voice and solution at the table.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
21	Environmental And Energy Study Institute Eesi	Exact match	Washington, DC, United StatesHQ recorded Sep 19, 2026	11-50	36 contacts →
	Exact match “The Environmental and Energy Study Institute (EESI) is a nonprofit organization established in 1984 by a bipartisan Congressional caucus to provide timely, credible information…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
22	The Partnership Project	Exact match	Washington, DC, United StatesHQ recorded Sep 19, 2026	51-200	35 contacts →
	Exact match “THE PARTNERSHIP PROJECT,(PP) is a 501(c)(3) non-profit organization based in WASHINGTON, District of Columbia, United States.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
23	Global Council For Science And The Environment Gcse	Exact match	Washington, DC, United StatesHQ recorded Sep 19, 2026	n/a	34 contacts →
	Exact match “The Global Council for Science and the Environment (GCSE) is a nongovernmental organization established in 1990 that advances the use of science to inform environmental…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
24	Earthshare	Exact match	Washington, DC, United StatesHQ recorded Sep 19, 2026	11-50	33 contacts →
	Exact match “EarthShare recognizes the power and influence that committed individuals can have for our planet.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
25	National Environmental Education Foundation Neef	Exact match	Washington, DC, United StatesHQ recorded Sep 19, 2026	11-50	33 contacts →
	Exact match “Congressionally chartered in 1990, NEEF's mission is to make the environment more accessible, relatable, relevant, and connected to the daily lives of all Americans.” 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 research 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 107 environmental research organizations based in Washington, United States

See the full list, filter by size, metro and specialty, and access 1,136 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Environmental research organizations based in Washington, United States at a glance

As of Sep 19, 2026

29.4%Verified-email coverage

36.1Average contacts per company

11-50Median size (employees)

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 107 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 Washington, United States whose business descriptions match “environmental research 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 1,136 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 research organizations by metro in the United States

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 research organizations”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many environmental research organizations are there based in Washington, United States?

RevenueBase identified 107 company matches for environmental research organizations associated with Washington, 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?

World Resources Institute tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city in the United States has the most environmental research organizations?

Washington leads the United States with 107 company records, followed by New York (82) and Seattle (66).

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 1,136 professional contacts with verified work emails tracked across these 107 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.