Company lists · Data refreshed September 2026

Top 25 Conservation education nonprofits based in the United States

Name: Conservation education 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 19, 2026 1,115 companies tracked

RevenueBase identified 1,115 conservation education nonprofits headquartered in the United States as of September 2026 and tracks 24,858 professional contacts across them, including 8,065 with verified work emails. New York is the largest hub.

This list covers conservation education 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 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

1,115Companies

24,858Contacts tracked

8,065Verified emails

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The 25 largest conservation education nonprofits based in the United States

Ranked by team size

Top 25 of 1,115 conservation education nonprofits 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 conservation education 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 19, 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 19, 2026
2	Student Conservation Association	Partial evidence	Arlington, VA, United StatesHQ checked Sep 19, 2026	201-500	795 contacts →
	Partial evidence “The Student Conservation Association (SCA) is the largest provider of hands-on environmental conservation programs for youth and adults.” Source: RevenueBase Database · checked Sep 19, 2026
3	National Wildlife Federation	Partial evidence	Reston, VA, United StatesHQ checked Sep 19, 2026	201-500	585 contacts →
	Partial evidence “As America's largest non-profit conservation organization, the National Wildlife Federation works closely with those who span the social and political spectrum, but who are…” Source: RevenueBase Database · checked Sep 19, 2026
4	Mass Audubon	Partial evidence	Lincoln, MA, United StatesHQ checked Sep 19, 2026	201-500	554 contacts →
	Partial evidence “Mass Audubon is the largest nature-based conservation organization in New England.” Source: RevenueBase Database · checked Sep 19, 2026
5	American Conservation Experience	Strong evidence	Flagstaff, AZ, United StatesHQ checked Sep 19, 2026	51-200	521 contacts →
	Strong evidence “American Conservation Experience (ACE) is a national nonprofit conservation corps that recruits, trains, and mobilizes over young adults and emerging professionals annually to…” Source: RevenueBase Database · checked Sep 19, 2026
6	Appalachian Mountain Club	Indirect evidence	Boston, MA, United StatesHQ checked Sep 19, 2026	201-500	378 contacts →
	Indirect evidence “The mission of the Appalachian Mountain Club is to foster the protection, enjoyment, and understanding of the outdoors.” Source: RevenueBase Database · checked Sep 19, 2026
7	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
8	Seaside Sustainability	Strong evidence	Gloucester, MA, United StatesHQ checked Sep 19, 2026	51-200	240 contacts →
	Strong 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
9	The Conservation Fund	Partial evidence	Arlington, VA, United StatesHQ checked Sep 19, 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 19, 2026
10	Conservation Legacy	Partial evidence	Durango, CO, United StatesHQ checked Sep 19, 2026	51-200	213 contacts →
	Partial evidence “Conservation Legacy is a national organization dedicated to supporting locally based conservation service programs.” Source: RevenueBase Database · checked Sep 19, 2026
11	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
12	Montana Conservation Corps	Strong evidence	Bozeman, MT, United StatesHQ checked Sep 19, 2026	n/a	193 contacts →
	Strong evidence “Montana Conservation Corps is a nonprofit organization whose mission is to inspire young people, through hands-on conservation service to be leaders, stewards of the land, and…” Source: RevenueBase Database · checked Sep 19, 2026
13	Naturebridge	Indirect evidence	Sausalito, CA, United StatesHQ checked Sep 19, 2026	201-500	188 contacts →
	Indirect evidence “Environmental science in nature’s classroom NatureBridge provides hands-on environmental science programs for young people.” Source: RevenueBase Database · checked Sep 19, 2026
14	John Ball ZOO	Strong evidence	Grand Rapids, MI, United StatesHQ checked Sep 19, 2026	51-200	158 contacts →
	Strong evidence “John Ball Zoo is a 501(c)(3) nonprofit corporation committed to the advancement of public education on the need for wildlife conservation and preservation.” Source: RevenueBase Database · checked Sep 19, 2026
15	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
16	LA Conservation Corps	Partial evidence	Los Angeles, CA, United StatesHQ checked Sep 19, 2026	51-200	129 contacts →
	Partial evidence “The primary mission of the LA Conservation Corps is to provide at-risk young adults and school-aged youth with opportunities for success by providing them with job skills…” Source: RevenueBase Database · checked Sep 19, 2026
17	KUPU	Indirect evidence	Honolulu, HI, United StatesHQ checked Sep 19, 2026	51-200	127 contacts →
	Indirect evidence “Much like the Kupukupu Fern, which is one of the first plants to bring life back to the land after a devastating lava flow, Kupu’s heart is to bring life back to the people, land…” Source: RevenueBase Database · checked Sep 19, 2026
18	Islandwood	Strong evidence	Bainbridge Island, WA, United StatesHQ checked Sep 19, 2026	51-200	112 contacts →
	Strong evidence “As an environmental education nonprofit, we believe there are many paths to creating a more sustainable and equitable world.” Source: RevenueBase Database · checked Sep 19, 2026
19	Leave NO Trace	Partial evidence	Boulder, CO, United StatesHQ checked Sep 19, 2026	11-50	112 contacts →
	Partial evidence “Leave No Trace is a member-funded 501(c)(3) non-profit organization providing Leave No Trace programs, education, training, and outreach in all 50 states and more than 100…” Source: RevenueBase Database · checked Sep 19, 2026
20	Southwest Conservation Corps	Partial evidence	Durango, CO, United StatesHQ checked Sep 19, 2026	11-50	108 contacts →
	Partial evidence “Empowering individuals to positively impact their lives, their communities and the environment, Southwest Conservation Corps (SCC) operates conservation service programs across…” Source: RevenueBase Database · checked Sep 19, 2026
21	Ecology Project International	Partial evidence	Missoula, MT, United StatesHQ checked Sep 19, 2026	51-200	105 contacts →
	Partial evidence “EPI is a non-profit organization dedicated to developing place-based, ecological education partnerships between local experts and high school students to address critical…” Source: RevenueBase Database · checked Sep 19, 2026
22	Loggerhead Marinelife Center	Strong evidence	Juno Beach, FL, United StatesHQ checked Sep 19, 2026	11-50	103 contacts →
	Strong evidence “Loggerhead Marinelife Center is a nonprofit sea turtle hospital that promotes the conservation of ocean ecosystems with a special focus on sea turtles.” Source: RevenueBase Database · checked Sep 19, 2026
23	Earthwatch Institute	Partial evidence	Boston, MA, United StatesHQ checked Sep 19, 2026	n/a	100 contacts →
	Partial evidence “Earthwatch Institute is focused on expanding access to hands-on science education.” Source: RevenueBase Database · checked Sep 19, 2026
24	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
25	Sprout UP	Strong evidence	Palo Alto, CA, United StatesHQ checked Sep 19, 2026	11-50	90 contacts →
	Strong evidence “Sprout Up (formerly Environmental Education for the Next Generation) is a 501(c)(3) nonprofit organization founded by undergraduate students at the University of California, Santa…” 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 education 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 conservation education nonprofits.
Partial evidence: Its own public description names part of conservation education nonprofits, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name conservation education 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 1,115 conservation education nonprofits based in the United States

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Conservation education nonprofits based in the United States at a glance

As of Sep 19, 2026

32.4%Verified-email coverage

22.3Average contacts per company

1-10Median size (employees)

2.2%Largest-city concentration · New York

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

753

11-50

275

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 1,115 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 education 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 “conservation education 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 conservation education 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 conservation education 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, 8,065 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.

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 education 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 conservation education nonprofits are there based in the United States?

RevenueBase identified 1,115 conservation education 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 conservation education nonprofits?

New York leads with 24 headquartered companies, followed by Washington (22) and Los Angeles (15).

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 8,065 verified decision-maker contacts tracked across these 1,115 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.