Company lists · Data refreshed September 2026
Top 25 Humane societies based in the United States
RevenueBase identified 1,260 humane societies headquartered in the United States as of September 2026 and tracks 18,156 professional contacts across them, including 5,469 with verified work emails. Columbus is the largest hub.
This list covers humane societies 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 humane societies based in the United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 956 contacts → | ||||
Indirect 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 | 502 contacts → | ||||
Indirect evidence “The mission of the Massachusetts Society for the Prevention of Cruelty to Animals is to protect animals, relieve their suffering, advance their health and welfare, prevent…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 3 | 472 contacts → | ||||
Partial 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. | |||||
| 4 | 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. | |||||
| 5 | 270 contacts → | ||||
Partial 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. | |||||
| 6 | 227 contacts → | ||||
Indirect evidence “Over the past 150+ years, we’ve been busy!” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 7 | 225 contacts → | ||||
Indirect 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. | |||||
| 8 | 175 contacts → | ||||
Indirect 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. | |||||
| 9 | 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. | |||||
| 10 | 153 contacts → | ||||
Partial 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. | |||||
| 11 | 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. | |||||
| 12 | 150 contacts → | ||||
Indirect 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. | |||||
| 13 | 148 contacts → | ||||
Partial 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. | |||||
| 14 | 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. | |||||
| 15 | 136 contacts → | ||||
Partial 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. | |||||
| 16 | 135 contacts → | ||||
Partial 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. | |||||
| 17 | 134 contacts → | ||||
Partial 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 20, 2026Thanks. The Data Team will review it. | |||||
| 18 | 132 contacts → | ||||
Partial 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. | |||||
| 19 | 127 contacts → | ||||
Partial 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. | |||||
| 20 | 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. | |||||
| 21 | 113 contacts → | ||||
Partial evidence “Lollypop Farm, the Humane Society of Greater Rochester, has been caring for the animals of Greater Rochester since 1873.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 22 | 113 contacts → | ||||
Partial 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. | |||||
| 23 | 111 contacts → | ||||
Indirect evidence “The Houston SPCA was founded in 1924 and remains Houston's oldest and largest Animal Protection Organization.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 24 | 109 contacts → | ||||
Partial evidence “The Nebraska Humane Society was founded in 1875 and is the fifth oldest Humane Society in the United States!” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 25 | 108 contacts → | ||||
Partial evidence “Since 1870, the Humane Society of Missouri has been dedicated to second chances.” 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: humane societies. 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 humane societies.
- Partial evidence
- Its own public description names part of humane societies, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name humane societies. 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 1,260 humane societies based in the United States
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Humane societies 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 1,260 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 humane societies, 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 “humane societies”. 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 humane societies), 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 humane societies, 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, 5,469 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 humane societies, 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 humane societies are there based in the United States?
RevenueBase identified 1,260 humane societies 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 humane societies?
Columbus leads with 10 headquartered companies, followed by Houston (10) and Denver (8).
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 5,469 verified decision-maker contacts tracked across these 1,260 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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