Company lists · Data refreshed September 2026

Top 25 Zoos organizations based in Washington, United States

Name: Zoos 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 16, 2026 59 companies tracked

RevenueBase identified 59 zoos organizations headquartered in Washington, United States as of September 2026 and tracks 4,904 professional contacts across them, including 1,520 with verified work emails. New York is the largest hub.

This list covers zoos organizations headquartered in Washington, 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 16, 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 16, 2026 86% judged on-target in blind review

59Companies

4,904Contacts tracked

1,520Verified emails

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The 25 largest zoos organizations based in Washington, United States

Ranked by team size

Top 25 of 59 zoos organizations based in Washington, United States, ranked by team size, largest first. Data refreshed Sep 16, 2026. RevenueBase Smart Search rates how each company's information relates to zoos 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	World Wildlife Fund	Indirect evidence	Washington, DC, United StatesHQ checked Sep 16, 2026	1,001-5,000	1,290 contacts →
	Indirect evidence “Our planet faces many big conservation challenges.” Source: RevenueBase Database · checked Sep 16, 2026
2	Humane World For Animals	Indirect evidence	Washington, DC, United StatesHQ checked Sep 16, 2026	501-1,000	873 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 16, 2026
3	IFAW	Indirect evidence	Washington, DC, United StatesHQ checked Sep 16, 2026	201-500	355 contacts →
	Indirect evidence “IFAW explores new ways to improve conditions for animals, people, and the place we call home-and we’ve been leading the way for over 50 years.” Source: RevenueBase Database · checked Sep 16, 2026
4	National Parks Conservation Association	Indirect evidence	Washington, DC, United StatesHQ checked Sep 16, 2026	51-200	303 contacts →
	Indirect 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 16, 2026
5	The Jane Goodall Institute	Indirect evidence	Washington, DC, United StatesHQ checked Sep 16, 2026	201-500	232 contacts →
	Indirect evidence “The Jane Goodall Institute is a global, community-led conservation organization founded in 1977 that advances the vision and work of Dr.” Source: RevenueBase Database · checked Sep 16, 2026
6	Defenders Of Wildlife	Indirect evidence	Washington, DC, United StatesHQ checked Sep 16, 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 16, 2026
7	The Wilderness Society	Indirect evidence	Washington, DC, United StatesHQ checked Sep 16, 2026	51-200	199 contacts →
	Indirect 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 16, 2026
8	National Park Foundation	Indirect evidence	Washington, DC, United StatesHQ checked Sep 16, 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 16, 2026
9	American Humane Society	Indirect evidence	Washington, DC, United StatesHQ checked Sep 16, 2026	51-200	134 contacts →
	Indirect evidence “Since our founding nearly 150 years ago, American Humane Society has served as a beacon for all those who cherish the human-animal bond.” Source: RevenueBase Database · checked Sep 16, 2026
10	Animal Legal Defense Fund	Indirect evidence	Washington, DC, United StatesHQ checked Sep 16, 2026	51-200	133 contacts →
	Indirect evidence “Founded in 1979 by attorneys active in shaping the emerging field of animal law, the Animal Legal Defense Fund blazes the trail for stronger enforcement of anti-cruelty laws and…” Source: RevenueBase Database · checked Sep 16, 2026
11	Safari Club International	Indirect evidence	Washington, DC, United StatesHQ checked Sep 16, 2026	51-200	114 contacts →
	Indirect evidence “Safari Club International is the leader in protecting the freedom to hunt and promoting wildlife conservation worldwide.” Source: RevenueBase Database · checked Sep 16, 2026
12	Greenpeace USA	Indirect evidence	Washington, DC, United StatesHQ checked Sep 16, 2026	51-200	97 contacts →
	Indirect evidence “Founded in 1971, Greenpeace began when a small group of activists sailed from Vancouver to protest nuclear testing at Amchitka, Alaska.” Source: RevenueBase Database · checked Sep 16, 2026
13	Society For Conservation Biology	Indirect evidence	Washington, DC, United StatesHQ checked Sep 16, 2026	11-50	70 contacts →
	Indirect 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 16, 2026
14	Humane Society International	Indirect evidence	Washington, DC, United StatesHQ checked Sep 16, 2026	11-50	63 contacts →
	Indirect evidence “Humane Society International works around the globe to promote the human-animal bond, rescue and protect dogs and cats, improve farm animal welfare, protect wildlife, promote…” Source: RevenueBase Database · checked Sep 16, 2026
15	Animal Welfare Institute	Indirect evidence	Washington, DC, United StatesHQ checked Sep 16, 2026	11-50	57 contacts →
	Indirect evidence “The Animal Welfare Institute is dedicated to alleviating animal suffering caused by people.” Source: RevenueBase Database · checked Sep 16, 2026
16	Conservation Nation	Indirect evidence	Washington, DC, United StatesHQ checked Sep 16, 2026	n/a	39 contacts →
	Indirect evidence “In the fight to save endangered animals and the planet, we need every smart voice and solution at the table.” Source: RevenueBase Database · checked Sep 16, 2026
17	Reserva The Youth Land Trust	Indirect evidence	Washington, DC, United StatesHQ checked Sep 16, 2026	1-10	28 contacts →
	Indirect evidence “Reserva: The Youth Land Trust, Inc.” Source: RevenueBase Database · checked Sep 16, 2026
18	The Humane Society Of The United States	Indirect evidence	Washington, DC, United StatesHQ checked Sep 16, 2026	501-1,000	23 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 16, 2026
19	Animal Wellness Action	Indirect evidence	Washington, DC, United StatesHQ checked Sep 16, 2026	1-10	19 contacts →
	Indirect evidence “Helping Animals Helps Us All.” Source: RevenueBase Database · checked Sep 16, 2026
20	National Wildlife Refuge Association	Indirect evidence	Washington, DC, United StatesHQ checked Sep 16, 2026	11-50	19 contacts →
	Indirect evidence “The National Wildlife Refuge Association (Refuge Association) was founded in 1975 to create a non-governmental voice for the National Wildlife Refuge System.” Source: RevenueBase Database · checked Sep 16, 2026
21	City Parks Alliance	Indirect evidence	Washington, DC, United StatesHQ checked Sep 16, 2026	1-10	18 contacts →
	Indirect evidence “City Parks Alliance is the only independent, nationwide membership organization solely dedicated to urban parks.” Source: RevenueBase Database · checked Sep 16, 2026
22	Antarctic And Southern Ocean Coalition	Indirect evidence	Washington, DC, United StatesHQ checked Sep 16, 2026	11-50	15 contacts →
	Indirect evidence “Founded in 1978, ASOC is the only non-governmental organization working full time to preserve the Antarctic continent and its surrounding Southern Ocean.” Source: RevenueBase Database · checked Sep 16, 2026
23	Endangered Species Coalition	Indirect evidence	Washington, DC, United StatesHQ checked Sep 16, 2026	11-50	15 contacts →
	Indirect evidence “The Endangered Species Coalition is a national network of hundreds of conservation, scientific, education, religious, sporting, outdoor recreation, business and community…” Source: RevenueBase Database · checked Sep 16, 2026
24	Animal Rescue Corps	Indirect evidence	Washington, United StatesHQ checked Sep 16, 2026	1-10	11 contacts →
	Indirect evidence “Animal Rescue Corps’ mission is to end animal suffering through direct and compassionate action, and to inspire the highest ethical standards of humanity towards animals.” Source: RevenueBase Database · checked Sep 16, 2026
25	PET Advocacy Network	Indirect evidence	Washington, DC, United StatesHQ checked Sep 16, 2026	1-10	11 contacts →
	Indirect evidence “We at the Pet Advocacy Network know that the benefits of pets are endless.” Source: RevenueBase Database · checked Sep 16, 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: zoos 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 zoos organizations.
Partial evidence: Its own public description names part of zoos organizations, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name zoos 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 59 zoos organizations based in Washington, United States

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Zoos organizations based in Washington, United States at a glance

As of Sep 16, 2026

31.0%Verified-email coverage

83.1Average contacts per company

11-50Median size (employees)

118.6%Largest-city concentration · New York

Sep 16, 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 59 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 zoos 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 Washington, United States whose own description of what they do matches “zoos 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 zoos 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 zoos organizations, and records with no verified work email. Companies headquartered outside Washington 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, 1,520 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 16, 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.

Zoos organizations by metro in the United States

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 zoos 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 zoos organizations are there based in Washington, United States?

RevenueBase identified 59 zoos organizations headquartered in Washington, 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?

World Wildlife Fund, headquartered in Washington, tops this list with the largest team on record.

Which city has the most zoos organizations?

New York leads with 70 headquartered companies, followed by Washington (59) and Los Angeles (45).

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 1,520 verified decision-maker contacts tracked across these 59 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 16, 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.