Data / Nonprofits / North Dakota / Williston / Animal-related
Animal-related nonprofits in Williston, ND: 5 registered with the IRS
5 animal-related nonprofits are registered with the IRS in Williston, ND, 5 of them 501(c)(3) charities; the 3 that report revenue took in $2.1 million. The largest by revenue: Mondak Humane Society ($1.2 million), Stray Sanctuary LLC ($574,018), Arrr Rescue and Retirement Ranch Inc ($292,694).
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Every organization, largest by revenue first
| Organization | Type | Since | Revenue | Assets | Filing |
|---|---|---|---|---|---|
| Mondak Humane Society | 501(c)(3) | 2000 | $1.2 million | $14.4 million | 2025-12 |
| Stray Sanctuary LLC | 501(c)(3) | 2022 | $574,018 | $71,590 | 2025-12 |
| Arrr Rescue and Retirement Ranch Inc | 501(c)(3) | 2022 | $292,694 | $626,677 | 2023-12 |
| Haven Hill Animal Sanctuary Inc | 501(c)(3) | 2026 | |||
| Milton S Olson Small Animal Benefit Foundation | 501(c)(3) | 2015 | $2.3 million | 2024-12 |
Other causes in Williston, ND
- Education 24
- Recreation and sports 17
- Youth development 17
- Religion-related 12
- Community improvement and capacity building 11
- Philanthropy, voluntarism and grantmaking foundations 10
- Arts, culture and humanities 9
- Mental health and crisis intervention 7
- Human services 6
- Health care 5
- Public and societal benefit 4
Every nonprofit in Williston, ND · Animal-related nonprofits across the state · Nonprofits in every city of the state
Read from the IRS Exempt Organizations Business Master File, updated by the IRS on October 24, 2026 and rebuilt here every morning. Revenue and assets are from each organization's latest filing as the IRS lists it; the IRS record is the official one. Organizations only: no people are named on these pages.