Mark H & Blanche M Harrington Foundation

Quick Stats

• Annual Giving: $1,183,000
• Assets: $24,465,477
• Number of Grants: 75 (2023)
• Average Grant Size: ~$13,400
• Geographic Focus: California, emphasis on southern California

Contact Details

Mailing Address: PO Box 2549, Rancho Cucamonga, CA 91729-2549

Physical Location: 701 N Haven Ave Ste 350, Ontario, CA 91764-4920

EIN: 95-6025594

Overview

The Mark H & Blanche M Harrington Foundation is a private foundation established by Mark H. and Blanche M. Harrington, operating from Ontario, California. With assets exceeding $24 million and annual grantmaking of approximately $1.2 million, the foundation focuses on supporting nonprofit organizations throughout California, with particular emphasis on southern California communities. The foundation made 75 grants in 2023, demonstrating consistent philanthropic commitment. The foundation maintains a focused approach to grantmaking, concentrating on healthcare institutions (notably children's hospitals), Christian and Roman Catholic religious organizations, family services, arts and culture, education, and social services.

Funding Priorities

Grant Programs

• General grantmaking program: Average grant ~$13,400 (based on 75 grants totaling ~$1M in 2023)
• Application method: Rolling basis via letter of inquiry

Priority Areas

• Healthcare: Children's hospitals and healthcare delivery services
• Religious Organizations: Christian and Roman Catholic churches, ministries, schools, and universities
• Family Services: Programs supporting families and child welfare
• Arts and Culture: Museums, theater, music, and cultural organizations
• Education: Higher education, university education, and Christian schools
• Social Services: Community development and human services programs
• Environment: Environmental and parks-related initiatives
• Philanthropy: Other philanthropic organizations

What They Don't Fund

• No grants to individuals
• Organizations outside California (particularly southern California) unlikely to receive funding

Governance and Leadership

Specific information about trustees and board members is not publicly available. The foundation operates as a private foundation under section 501(c)(3) of the Internal Revenue Code with limited public disclosure of governance structure.

Application Process & Timeline

How to Apply

Applications accepted on a rolling basis with no fixed deadlines:

1. Send a letter to the foundation's mailing address
2. Letter should include:
   • Organization's charitable purpose
   • Detailed description of project or program
   • Proposed use of funds
   • Amount of funding requested

No online application portal or preliminary inquiry requirement indicated.

Decision Timeline

Specific timelines not published. As a private foundation making ~75 grants annually, anticipate review periods of several months.

Success Rates

Not publicly available. Foundation awarded 75 grants in 2023 and 77 in 2020, showing consistent activity.

Reapplication Policy

No published policy. Unsuccessful applicants should consider waiting at least one year before reapplying.

Application Success Factors

• Mission Alignment: Demonstrate clear alignment with foundation priorities, particularly healthcare for children, faith-based initiatives, and family services
• Geographic Focus: Emphasize impact in southern California communities
• Religious Connection: Faith-based organizations, Christian schools, and Catholic churches particularly well-positioned
• Clear Communication: With letter-based application, provide concise, specific descriptions of needs and intended outcomes
• Appropriate Request Size: Align requests with typical grant range (~$13,400 average)
• Established Track Record: Foundation likely favors established 501(c)(3) organizations over startups

Key Takeaways for Grant Writers

• Simple letter-based application process with rolling deadlines makes this an accessible funder
• Excellent fit for faith-based organizations in southern California
• Healthcare organizations serving children should emphasize pediatric focus
• Moderate grant sizes appropriate for program support rather than major campaigns
• Consistent annual grantmaking indicates reliable funding prospect
• Limited public information means success depends on well-crafted letters clearly articulating need and mission alignment
• Organizations in Inland Empire, Los Angeles, and Orange County areas have strongest geographic fit

References

• ProPublica Nonprofit Explorer - Mark H & Blanche M Harrington Foundation. EIN 95-6025594. https://projects.propublica.org/nonprofits/organizations/956025594 (Accessed March 2026)
• Cause IQ - Mark H and Blanche M Harrington Foundation profile. https://www.causeiq.com/organizations/mark-h-and-blanche-m-harrington-foundation,956025594/ (Accessed March 2026)
• GrantStation - Mark H. and Blanche M. Harrington Foundation profile. https://grantstation.com/grantmakers/mark-h-and-blanche-m-harrington-foundation (Accessed March 2026)
• Candid Foundation Directory - Mark H & Blanche M Harrington Foundation. https://fconline.foundationcenter.org/fdo-grantmaker-profile?key=HARR016 (Accessed March 2026)
• Grantmakers.io - Foundation Profile. https://www.grantmakers.io/profiles/v0/956025594-mark-h-and-blanche-m-harrington-foundation/ (Accessed March 2026)