Company lists · Data refreshed September 2026

Top 25 Forest conservation nonprofits based in the United States

Name: Forest conservation 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 20, 2026 352 companies tracked

RevenueBase identified 352 forest conservation nonprofits headquartered in the United States as of September 2026 and tracks 12,221 professional contacts across them, including 5,006 with verified work emails. San Francisco is the largest hub.

This list covers forest conservation nonprofits 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 20, 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 20, 2026 86% judged on-target in blind review

352Companies

12,221Contacts tracked

5,006Verified emails

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The 25 largest forest conservation nonprofits based in the United States

Ranked by team size

Top 25 of 352 forest conservation nonprofits based in the United States, ranked by team size, largest first. Data refreshed Sep 20, 2026. RevenueBase Smart Search rates how each company's information relates to forest conservation nonprofits: 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	The Nature Conservancy	Indirect evidence	Arlington, VA, United StatesHQ checked Sep 20, 2026	5,001-10,000	6,526 contacts →
	Indirect evidence “Air, water, food, shelter, income: nature sustains every aspect of our lives.” Source: RevenueBase Database · checked Sep 20, 2026
2	RARE	Indirect evidence	Arlington, VA, United StatesHQ checked Sep 20, 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 20, 2026
3	Arbor DAY Foundation	Strong evidence	Lincoln, NE, United StatesHQ checked Sep 20, 2026	201-500	236 contacts →
	Strong evidence “Founded in 1972, the nonprofit Arbor Day Foundation is a million-member conservation and education organization with a mission of inspiring people to plant, nurture, and celebrate…” Source: RevenueBase Database · checked Sep 20, 2026
4	The Conservation Fund	Partial evidence	Arlington, VA, United StatesHQ checked Sep 20, 2026	201-500	224 contacts →
	Partial 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 20, 2026
5	National Forest Foundation	Partial evidence	Missoula, MT, United StatesHQ checked Sep 20, 2026	51-200	171 contacts →
	Partial evidence “The NFF works with communities and organizations to conserve and enhance the watersheds, wildlife habitat and wild places across our 193-million-acre National Forest System.” Source: RevenueBase Database · checked Sep 20, 2026
6	Mongabay	Partial evidence	Menlo Park, CA, United StatesHQ checked Sep 20, 2026	51-200	152 contacts →
	Partial evidence “Mongabay.com publishes news and information on tropical forests and related topics.” Source: RevenueBase Database · checked Sep 20, 2026
7	American Forests	Strong evidence	Washington, DC, United StatesHQ checked Sep 20, 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 20, 2026
8	American Forest Foundation	Strong evidence	Washington, DC, United StatesHQ checked Sep 20, 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 20, 2026
9	Trees Atlanta	Indirect evidence	Atlanta, GA, United StatesHQ checked Sep 20, 2026	11-50	111 contacts →
	Indirect evidence “Founded in 1985 by Central Atlanta Progress, the Junior League of Atlanta, Inc.” Source: RevenueBase Database · checked Sep 20, 2026
10	Terraformation	Partial evidence	Waimea, United StatesHQ checked Sep 20, 2026	51-200	101 contacts →
	Partial evidence “Restoring the world's native forests to address climate change, renew biodiverse ecosystems, and support thriving communities.” Source: RevenueBase Database · checked Sep 20, 2026
11	ONE Tree Planted	Indirect evidence	Shelburne, VT, United StatesHQ checked Sep 20, 2026	51-200	97 contacts →
	Indirect evidence “Since 2014, One Tree Planted has been dedicated to global reforestation.” Source: RevenueBase Database · checked Sep 20, 2026
12	Save The Redwoods League	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 20, 2026	51-200	95 contacts →
	Partial evidence “Save the Redwoods is helping shape the future of California’s redwood forests.” Source: RevenueBase Database · checked Sep 20, 2026
13	Urban Ecology Center	Indirect evidence	Milwaukee, WI, United StatesHQ checked Sep 20, 2026	51-200	93 contacts →
	Indirect evidence “Our vision is to inspire generations to build environmental curiosity, understanding, and respect.” Source: RevenueBase Database · checked Sep 20, 2026
14	Bridging The GAP	Indirect evidence	Kansas City, MO, United StatesHQ checked Sep 20, 2026	11-50	83 contacts →
	Indirect evidence “Bridging The Gap brings people together to protect and restore the web of life on Earth and foster inclusive, thriving communities through environmental education, innovation, and…” Source: RevenueBase Database · checked Sep 20, 2026
15	Health In Harmony	Indirect evidence	Portland, OR, United StatesHQ checked Sep 20, 2026	11-50	78 contacts →
	Indirect evidence “Health In Harmony’s mission is to reverse tropical rainforest deforestation for planetary health.” Source: RevenueBase Database · checked Sep 20, 2026
16	Forest Trends Association	Partial evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	11-50	76 contacts →
	Partial 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 20, 2026
17	The Greening Of Detroit	Indirect evidence	Detroit, MI, United StatesHQ checked Sep 20, 2026	11-50	75 contacts →
	Indirect evidence “Our Mission Statement: Inspiring sustainable growth of a healthy urban community through trees, green spaces, food, education, training and job opportunities.” Source: RevenueBase Database · checked Sep 20, 2026
18	Save The Sound	Indirect evidence	New Haven, CT, United StatesHQ checked Sep 20, 2026	11-50	74 contacts →
	Indirect evidence “Save the Sound leads environmental action across Connecticut, Westchester, NYC, and Long Island.” Source: RevenueBase Database · checked Sep 20, 2026
19	Rainforest Action Network	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 20, 2026	51-200	74 contacts →
	Partial evidence “Rainforest Action Network preserves forests, protects the climate and upholds human rights by challenging corporate power and systemic injustice through frontline partnerships and…” Source: RevenueBase Database · checked Sep 20, 2026
20	stand.earth	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 20, 2026	11-50	71 contacts →
	Indirect evidence “Stand.earth challenges corporations and governments to treat people and the environment with respect, because our lives depend on it.” Source: RevenueBase Database · checked Sep 20, 2026
21	Tree Trust	Indirect evidence	St Paul, MN, United StatesHQ checked Sep 20, 2026	11-50	70 contacts →
	Indirect evidence “Our mission is to transform lives and landscapes by engaging people to build skills for meaningful careers, inspiring people to plant trees, and making our community a greener…” Source: RevenueBase Database · checked Sep 20, 2026
22	Friends Of The Forest Preserves	Partial evidence	Chicago, IL, United StatesHQ checked Sep 20, 2026	51-200	68 contacts →
	Partial evidence “We unite people to protect, promote, and care for the forest preserves in Cook County.” Source: RevenueBase Database · checked Sep 20, 2026
23	Delaware Nature Society	Partial evidence	Hockessin, DE, United StatesHQ checked Sep 20, 2026	51-200	64 contacts →
	Partial evidence “Founded in 1964, Delaware Nature Society works to improve the environment through conservation, advocacy, and education.” Source: RevenueBase Database · checked Sep 20, 2026
24	Openlands	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 20, 2026	11-50	60 contacts →
	Indirect evidence “As innovative protectors and stewards of the land since 1963, Openlands exists to create access to nature for all.” Source: RevenueBase Database · checked Sep 20, 2026
25	Wildlife Alliance	Partial evidence	New York, NY, United StatesHQ checked Sep 20, 2026	51-200	57 contacts →
	Partial evidence “Wildlife Alliance’s mission: direct protection for forests and wildlife.” Source: RevenueBase Database · checked Sep 20, 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: forest conservation nonprofits. 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 forest conservation nonprofits.
Partial evidence: Its own public description names part of forest conservation nonprofits, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name forest conservation nonprofits. 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 352 forest conservation nonprofits based in the United States

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Forest conservation nonprofits based in the United States at a glance

As of Sep 20, 2026

41.0%Verified-email coverage

34.7Average contacts per company

1-10Median size (employees)

2.3%Largest-city concentration · San Francisco

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

229

11-50

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 352 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 forest conservation nonprofits, 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 “forest conservation nonprofits”. 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 forest conservation nonprofits), 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 forest conservation nonprofits, 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, 5,006 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 20, 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.

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 forest conservation nonprofits, 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 forest conservation nonprofits are there based in the United States?

RevenueBase identified 352 forest conservation nonprofits 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?

The Nature Conservancy, headquartered in Arlington, tops this list with the largest team on record.

Which city has the most forest conservation nonprofits?

San Francisco leads with 8 headquartered companies, followed by Washington (8) and Arlington (5).

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 5,006 verified decision-maker contacts tracked across these 352 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 20, 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.