Data / Nonprofits / California / Ontario / Mutual and membership benefit
Mutual and membership benefit nonprofits in Ontario, CA: 9 registered with the IRS
9 mutual and membership benefit nonprofits are registered with the IRS in Ontario, CA, 2 of them 501(c)(3) charities; the 3 that report revenue took in $1.9 million. The largest by revenue: Ontario Professional Firefighters Local 1430 Retiree Healthcare Savi ($1.4 million), Millwright Labor-Management Cooperation Committee ($509,799), Ontario Lodge No 345 of the Independent Order of Odd Fellows ($46,231).
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Every organization, largest by revenue first
| Organization | Type | Since | Revenue | Assets | Filing |
|---|---|---|---|---|---|
| Ontario Professional Firefighters Local 1430 Retiree Healthcare Savi | 501(c)(9) | 2017 | $1.4 million | $11.1 million | 2025-12 |
| Millwright Labor-Management Cooperation Committee | 501(c)(6) | 2014 | $509,799 | $1.8 million | 2025-12 |
| Ontario Lodge No 345 of the Independent Order of Odd Fellows | 501(c)(8) | 2021 | $46,231 | $319,253 | 2024-12 |
| Associated Mountain View Teachers | 501(c)(5) | 2015 | $0 | $0 | 2025-06 |
| Continuing the Dream | 501(c)(3) | 2023 | $0 | $0 | 2025-12 |
| Fraternal Order of Eagles | 501(c)(8) | 2024 | $0 | $0 | 2025-05 |
| Inland Empire Chapter - Association of Certified Fraud Examiners | 501(c)(6) | 2010 | $0 | $0 | 2025-12 |
| Retiree Club No 90951 | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| San Secondo Dasti Council 12938 | 501(c)(8) | 2024 | $0 | $0 | 2025-12 |
Other causes in Ontario, CA
- Religion-related 95
- Human services 56
- Education 54
- Recreation and sports 28
- Arts, culture and humanities 27
- Community improvement and capacity building 17
- Youth development 17
- Philanthropy, voluntarism and grantmaking foundations 12
- Health care 11
- Public and societal benefit 11
- Mental health and crisis intervention 8
- Animal-related 8
- Food, agriculture and nutrition 6
- International, foreign affairs and national security 5
- Employment 5
- Environment 4
- Housing and shelter 4
- Crime and legal-related 3
Every nonprofit in Ontario, CA · Mutual and membership benefit 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.