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Nonprofits in ONTARIO, CA

347 tax-exempt organizations with a return on IRS file.

Largest nonprofits in ONTARIO by revenue

Top 5s in ONTARIO

Most raised in gifts and grants

Contributions, gifts and grants received in the year

  1. 1Prime Healthcare Foundation Inc990, year ended Dec 2024$87.5M
  2. 2Real Journey Academies Inc990, year ended Jun 2025$60.1M
  3. 3Building Bridges Foster Family Agency990, year ended Dec 2024$9.1M
  4. 4West End Family Counseling Service990, year ended Jun 2025$5.7M
  5. 5Futuro Infantil Hispano990, year ended Jun 2025$3.6M

Largest reserves

Net assets (fund balance) at year end

  1. 1Prime Healthcare Foundation Inc990, year ended Dec 2024$902M
  2. 2International Association of Plumbing and Mechanical Officials990, year ended Dec 2024$34.8M
  3. 3Real Journey Academies Inc990, year ended Jun 2025$34.4M
  4. 4District Council of Ironworkers of the State of California & Vicinity990, year ended Jun 2025$27.8M
  5. 5Ontario Cementery Association990, year ended Dec 2025$26.7M

Highest-paid people

Compensation from the organization and related organizations, including other pay

  1. 1David ViolaCEO · International Association of Plumbing and Mechanical Officials$1.2M
  2. 2Scott SimpsonPresident/CEO · California Credit Union League$943.3K
  3. 3Diana DykstraFormer President/CEO · California Credit Union League$756.4K
  4. 4Rahim KhanPhysician - RVP · Prime Healthcare Foundation Inc$698K
  5. 5Ahmed NadeemPhysician - LMC · Prime Healthcare Foundation Inc$696.2K

All nonprofits in ONTARIO, A–Z (page 1 of 4)