Company lists · Data refreshed September 2026

Top 25 Conservation travel organizations based in the United States

Name: Conservation travel organizations 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 573 companies tracked

RevenueBase identified 573 conservation travel organizations headquartered in the United States as of September 2026 and tracks 21,732 professional contacts across them, including 6,772 with verified work emails. Washington is the largest hub.

This list covers conservation travel organizations 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

573Companies

21,732Contacts tracked

6,772Verified emails

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The 25 largest conservation travel organizations based in the United States

Ranked by team size

Top 25 of 573 conservation travel organizations 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 travel 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	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	Wildlife Conservation Society	Indirect evidence	Bronx, NY, United StatesHQ checked Sep 19, 2026	1,001-5,000	3,663 contacts →
	Indirect evidence “WCS stands for wildlife and wild places.” Source: RevenueBase Database · checked Sep 19, 2026
3	World Wildlife Fund	Partial evidence	Washington, DC, United StatesHQ checked Sep 19, 2026	1,001-5,000	1,290 contacts →
	Partial evidence “Our planet faces many big conservation challenges.” Source: RevenueBase Database · checked Sep 19, 2026
4	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
5	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
6	Denver ZOO Conservation Alliance	Partial evidence	Denver, CO, United StatesHQ checked Sep 19, 2026	201-500	413 contacts →
	Partial evidence “For 129 years, Denver Zoo Conservation Alliance has connected people with wildlife.” Source: RevenueBase Database · checked Sep 19, 2026
7	National Parks Conservation Association	Partial evidence	Washington, DC, United StatesHQ checked Sep 19, 2026	51-200	303 contacts →
	Partial 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
8	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
9	Center For Biological Diversity	Indirect evidence	Tucson, AZ, United StatesHQ checked Sep 19, 2026	51-200	219 contacts →
	Indirect evidence “At the Center for Biological Diversity, we believe that the welfare of human beings is deeply linked to nature, to the existence in our world of a vast diversity of wild animals…” Source: RevenueBase Database · checked Sep 19, 2026
10	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
11	The Wilderness Society	Partial evidence	Washington, DC, United StatesHQ checked Sep 19, 2026	51-200	199 contacts →
	Partial 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
12	Five Rivers Metroparks	Indirect evidence	Dayton, OH, United StatesHQ checked Sep 19, 2026	201-500	197 contacts →
	Indirect evidence “Five Rivers MetroParks protects the region's natural heritage and provides outdoor experiences that inspire a personal connection with nature.” Source: RevenueBase Database · checked Sep 19, 2026
13	Natural Habitat Adventures	Strong evidence	Louisville, CO, United StatesHQ checked Sep 19, 2026	51-200	196 contacts →
	Strong evidence “As the conservation travel partner of World Wildlife Fund, Natural Habitat Adventures (Nat Hab) is the leader in responsible nature travel.” Source: RevenueBase Database · checked Sep 19, 2026
14	Wildlife Works	Partial evidence	Mill Valley, CA, United StatesHQ checked Sep 19, 2026	201-500	188 contacts →
	Partial evidence “Wildlife Works is a community-centered wildlife conservation company that implements market-based initiatives to protect the planet’s threatened wilderness and endangered wildlife.” Source: RevenueBase Database · checked Sep 19, 2026
15	Mongabay	Indirect evidence	Menlo Park, CA, United StatesHQ checked Sep 19, 2026	51-200	152 contacts →
	Indirect evidence “Mongabay.com publishes news and information on tropical forests and related topics.” Source: RevenueBase Database · checked Sep 19, 2026
16	Global Sustainable Tourism Council Gstc	Indirect evidence	Washington, DC, United StatesHQ checked Sep 19, 2026	11-50	121 contacts →
	Indirect evidence “The Global Sustainable Tourism Council® (GSTC®) establishes and manages the GSTC Standards, the global sustainable standards (formerly known as the GSTC Criteria).” Source: RevenueBase Database · checked Sep 19, 2026
17	Leave NO Trace	Indirect evidence	Boulder, CO, United StatesHQ checked Sep 19, 2026	11-50	112 contacts →
	Indirect 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
18	Wildaid	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 19, 2026	11-50	99 contacts →
	Indirect evidence “Our mission is to protect wildlife and vital habitats from the illegal wildlife trade, the effects of climate change, and more.” Source: RevenueBase Database · checked Sep 19, 2026
19	The Wilds	Indirect evidence	Cumberland, OH, United StatesHQ checked Sep 19, 2026	51-200	88 contacts →
	Indirect evidence “At The Wilds, our mission is simple but powerful: Empowering People.” Source: RevenueBase Database · checked Sep 19, 2026
20	Fossil RIM Wildlife Center	Partial evidence	Glen Rose, TX, United StatesHQ checked Sep 19, 2026	51-200	84 contacts →
	Partial evidence “Fossil Rim Wildlife Center is dedicated to the conservation of species in peril, conducting scientific research, training of professionals.” Source: RevenueBase Database · checked Sep 19, 2026
21	Zoological Society Of Milwaukee	Indirect evidence	Milwaukee, WI, United StatesHQ checked Sep 19, 2026	51-200	83 contacts →
	Indirect evidence “The Zoological Society of Milwaukee's mission is to conserve wildlife and endangered species, educate people about the importance of wildlife and the environment, and support the…” Source: RevenueBase Database · checked Sep 19, 2026
22	Society For Conservation Biology	Partial evidence	Washington, DC, United StatesHQ checked Sep 19, 2026	11-50	70 contacts →
	Partial 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
23	Conservation Strategy Fund	Partial evidence	Washington, DC, United StatesHQ checked Sep 19, 2026	11-50	69 contacts →
	Partial evidence “Conservation Strategy Fund (CSF) sustains natural ecosystems and human communities through strategies powered by conservation economics.” Source: RevenueBase Database · checked Sep 19, 2026
24	Akashinga	Partial evidence	Southfield, MI, United StatesHQ checked Sep 19, 2026	501-1,000	68 contacts →
	Partial evidence “Akashinga delivers resilient nature conservation programmes of global significance through community-driven partnerships.” Source: RevenueBase Database · checked Sep 19, 2026
25	Wildlife Conservation Network	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 19, 2026	11-50	68 contacts →
	Partial evidence “Founded in 2002, Wildlife Conservation Network (WCN) is dedicated to protecting endangered species and preserving their natural habitats.” 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 travel 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 travel organizations.
Partial evidence: Its own public description names part of conservation travel organizations, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name conservation travel 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 573 conservation travel organizations based in the United States

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Conservation travel organizations based in the United States at a glance

As of Sep 19, 2026

31.2%Verified-email coverage

37.9Average contacts per company

1-10Median size (employees)

5.6%Largest-city concentration · Washington

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

401

11-50

115

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 573 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 travel 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 the United States whose own description of what they do matches “conservation travel 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 travel 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 travel organizations, 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, 6,772 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 travel organizations by metro

Conservation travel organizations in Washington32

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 travel 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 travel organizations are there based in the United States?

RevenueBase identified 573 conservation travel organizations 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 travel organizations?

Washington leads with 32 headquartered companies, followed by New York (23) and Denver (13).

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 6,772 verified decision-maker contacts tracked across these 573 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.