Company lists · Data refreshed September 2026
Top 25 No kill shelters based in the United States
RevenueBase identified 1,067 no kill shelters headquartered in the United States as of September 2026 and tracks 15,717 professional contacts across them, including 4,863 with verified work emails. New York is the largest hub.
This list covers no kill shelters 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.
The 25 largest no kill shelters based in the United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 956 contacts → | ||||
Partial evidence “Best Friends Animal Society is the leading animal welfare organization working to end the killing of dogs and cats in America’s shelters by 2025.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 2 | 472 contacts → | ||||
Indirect evidence “Every year, Animal Humane Society provides direct care and services to help more than animals in need across Minnesota.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 3 | 434 contacts → | ||||
Partial evidence “San Diego Humane Society, an open-admission shelter, is creating a more humane world by inspiring compassion and advancing the welfare of animals and people.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 4 | 270 contacts → | ||||
Indirect evidence “At the San Francisco SPCA we envision a world in which the love people share with animals uplifts humanity to a state of greater compassion.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 5 | 225 contacts → | ||||
Strong evidence “PAWS Chicago is one of the nation’s largest comprehensive No Kill animal welfare organizations, building innovative programs to end the killing of homeless pets.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 6 | 175 contacts → | ||||
Partial evidence “Founded in 1938, the SPCA of Texas is a 501(c)(3) non-profit animal welfare organization that operates one shelter, one spay/neuter clinic, one mobile adoptions vehicle and an…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 7 | 174 contacts → | ||||
Indirect evidence “Since 1944, North Shore Animal League America has been saving the lives of innocent dogs, cats, puppies, and kittens, over to date.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 8 | 153 contacts → | ||||
Indirect evidence “Founded in 1879, the Wisconsin Humane Society has been saving the lives of animals in need for nearly 140 years.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 9 | 150 contacts → | ||||
Indirect evidence “Helen Woodward Animal Center is a unique, private, non-profit organization in San Diego County that, for over 50 years, has been committed to the philosophy of people helping…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 10 | 150 contacts → | ||||
Partial evidence “At LifeLine Animal Project, we don’t just run shelters, we’re saving lives.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 11 | 148 contacts → | ||||
Indirect evidence “Founded in 1949, the Humane Society of the Pikes Peak Region (HSPPR) is a public 501 (c) 3 nonprofit animal welfare organization dedicated to the care and protection of…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 12 | 146 contacts → | ||||
Partial evidence “Humane Society Silicon Valley (HSSV) is an independent, 501(c)(3) non-profit animal shelter that has been serving people and pets since 1929.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 13 | 136 contacts → | ||||
Strong evidence “The Atlanta Humane Society is a no-kill shelter providing sheltering and adoption, veterinary care, and community outreach.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 14 | 135 contacts → | ||||
Indirect evidence “The Washington Humane Society and the Washington Animal Rescue League have each served the animals and people of the District of Columbia and the National Capitol region for over…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 15 | 132 contacts → | ||||
Indirect evidence “Peninsula Humane Society & SPCA is a private, open-door, not-for-profit animal welfare organization.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 16 | 127 contacts → | ||||
Indirect evidence “Founded in 1897, Seattle Humane is creating a kinder world for pets and their people through impactful programs and support services.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 17 | 113 contacts → | ||||
Indirect evidence “For over 125 years, The Animal Rescue League of Boston (ARL) has responded to the needs of animals and the people who care about them.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 18 | 113 contacts → | ||||
Indirect evidence “Humane Animal Rescue of Pittsburgh (HARP) is one of Pennsylvania’s largest non-profit organizations dedicated to the welfare of animals, pet owners and the community.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 19 | 101 contacts → | ||||
Indirect evidence “Founded in 1944, Wayside Waifs is a private, 501c3 animal welfare organization in Kansas City, Missouri.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 20 | 100 contacts → | ||||
Partial evidence “Pasadena Humane is more than an animal shelter; we are a community-supported animal resource center providing compassion and care for all animals.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 21 | 98 contacts → | ||||
Indirect evidence “Founded in 1899, Anti-Cruelty is Chicago’s oldest and largest, private, open-admission, unlimited stay humane society.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 22 | 92 contacts → | ||||
Indirect evidence “The Humane Society of Tampa Bay is dedicated to ending animal homelessness and providing care and comfort for companion animals in need.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 23 | 91 contacts → | ||||
Indirect evidence “The Richmond SPCA is a non-profit organization located in the heart of Richmond, Virginia.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 24 | 89 contacts → | ||||
Indirect evidence “The Humane Society of North Texas (HSNT) was founded in 1905 and is the oldest animal welfare organization in the Dallas/Fort Worth area.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 25 | 86 contacts → | ||||
Indirect evidence “Love starts here.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
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: no kill shelters. 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 no kill shelters.
- Partial evidence
- Its own public description names part of no kill shelters, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name no kill shelters. 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 1,067 no kill shelters based in the United States
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No kill shelters based in the United States at a glance
As of Sep 20, 2026Companies by employee count
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 1,067 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 no kill shelters, 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 “no kill shelters”. 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 no kill shelters), 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 no kill shelters, 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, 4,863 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 no kill shelters, 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 no kill shelters are there based in the United States?
RevenueBase identified 1,067 no kill shelters 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?
Best Friends Animal Society, headquartered in Kanab, tops this list with the largest team on record.
Which city has the most no kill shelters?
New York leads with 10 headquartered companies, followed by Los Angeles (9) and Chicago (7).
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 4,863 verified decision-maker contacts tracked across these 1,067 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.
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