Company lists · Data refreshed September 2026

Top 25 Environmental education nonprofits based in Washington, United States

Name: Environmental education nonprofits 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 62 companies tracked

RevenueBase identified 62 company matches for environmental education nonprofits associated with Washington, United States as of September 2026 and tracks 1,193 professional contacts across them, including 467 with verified work emails. Across the United States, Washington is the largest hub for this category.

This list covers company matches for environmental education nonprofits 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

62Companies

1,193Contacts tracked

467Verified emails

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The 25 largest environmental education nonprofits based in Washington, United States

Ranked by team size

Top 25 of 62 company matches for environmental education nonprofits 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	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
2	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
3	Earthecho International	Exact match	Washington, DC, United StatesHQ recorded Sep 19, 2026	n/a	86 contacts →
	Exact match “EarthEcho International is a nonprofit 501c3 organization founded in 2005 by siblings Philippe and Alexandra Cousteau in honor of their father Philippe Cousteau Sr, son of the…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
4	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
5	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
6	North American Association For Environmental Education Naaee	Exact match	Washington, DC, United StatesHQ recorded Sep 19, 2026	11-50	55 contacts →
	Exact match “For more than five decades, NAAEE has been a leader in promoting excellence in environmental education throughout North America.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
7	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
8	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
9	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
10	Planet Forward	Exact match	Washington, DC, United StatesHQ recorded Sep 19, 2026	n/a	39 contacts →
	Exact match “Planet Forward is a project of The George Washington University School of Media & Public Affairs.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
11	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
12	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
13	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
14	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
15	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
16	OUT Teach	Exact match	Washington, DC, United StatesHQ recorded Sep 19, 2026	11-50	31 contacts →
	Exact match “Out Teach (formerly REAL School Gardens) equips teachers to unlock student performance with the power of outdoor experiential learning.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
17	Reserva The Youth Land Trust	Exact match	Washington, DC, United StatesHQ recorded Sep 19, 2026	1-10	28 contacts →
	Exact match “Reserva: The Youth Land Trust, Inc.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
18	Living Classrooms Of The National Capital Region	Exact match	Washington, DC, United StatesHQ recorded Sep 19, 2026	51-200	24 contacts →
	Exact match “Living Classrooms Foundation strengthens communities and inspires young people to achieve their potential through hands-on education and job training, using urban, natural, and…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
19	Creation Justice Ministries	Exact match	Washington, DC, United StatesHQ recorded Sep 19, 2026	1-10	12 contacts →
	Exact match “Creation Justice Ministries educates, equips and mobilizes individuals, congregations, and communions/denominations to protect, restore, and rightly share God's Creation.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
20	CFACT	Exact match	Washington, DC, United StatesHQ recorded Sep 19, 2026	11-50	12 contacts →
	Exact match “In 1985, the Committee For A Constructive Tomorrow (CFACT) was founded to promote a positive voice on environment and development issues.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
21	EDF Action	Exact match	Washington, DC, United StatesHQ recorded Sep 19, 2026	501-1,000	10 contacts →
	Exact match “EDF Action, the advocacy partner of the Environmental Defense Fund, builds transformative political power to help protect our environment and the health of American families.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
22	Earth Conservation Corps	Exact match	Washington, DC, United StatesHQ recorded Sep 19, 2026	11-50	10 contacts →
	Exact match “The Earth Conservation Corps is a nonprofit youth development and environmental organization located along the heavily polluted Anacostia River.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
23	Conservation Allies	Exact match	Washington, DC, United StatesHQ recorded Sep 19, 2026	1-10	9 contacts →
	Exact match “The single greatest challenge for local conservation organizations based in developing nations is raising funds to sustain their activities.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
24	Interfaith Power & Light Dc.Md.Nova	Exact match	Washington, DC, United StatesHQ recorded Sep 19, 2026	1-10	9 contacts →
	Exact match “Interfaith Power & Light (DC.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
25	Healthy Schools Network	Exact match	Washington, DC, United StatesHQ recorded Sep 19, 2026	1-10	5 contacts →
	Exact match “Healthy Schools Network, Inc.” 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 62 environmental education nonprofits based in Washington, United States

See the full list, filter by size, metro and specialty, and access 467 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Environmental education nonprofits based in Washington, United States at a glance

As of Sep 19, 2026

39.1%Verified-email coverage

19.2Average contacts per company

1-10Median size (employees)

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

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 62 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 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 467 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 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 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 Washington, United States?

RevenueBase identified 62 company matches for environmental education nonprofits 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?

earthday.org 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 education nonprofits?

Washington leads the United States with 62 company records, followed by New York (51) 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 467 professional contacts with verified work emails tracked across these 62 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.