Mark H and Blanche M Harrington Foundation
At a glance
Key takeaways
- The foundation's stated interests cover arts and culture, Christian organisations, children and youth (including at-risk youth), education, the environment, health (including hospitals), historic preservation and social services, so a programme that clearly fits one of these is worth raising.
- About 8 in 10 of its grants fall between $2,000 and $25,000, with a median of $6,000, so a modest request fits its typical practice, though the largest grant was about $270,000 and that band is not a ceiling.
- It asks for a letter identifying the charitable purpose and proposed use of funds, and the filing gives no deadlines for one.
- In its latest filing, 90% of grant dollars to organisations went to organisations it had also funded in earlier filings, so giving is largely repeat-led; a first approach should be carefully matched to its stated interests, and a new applicant is not barred by that.
- No exclusions or eligibility rules are stated, and its filing states no geographic focus, so location should not be assumed to limit who may apply.
Overview
Mark H and Blanche M Harrington Foundation is a US private foundation administered by its trustee, Citizens Business Bank, in Ontario, CA.
What they fund
Profile derived from the foundation's IRS Form 990-PF filings (TY2025, TY2024, TY2023) and web pages about the foundation (californiacitynews.org), with every statement checked against those sources. Sources read on 13 October 2026.
Priority Areas
The foundation makes grants to nonprofit organisations, with an emphasis in Southern California. Its stated areas of interest include arts and culture, Christian organisations, children and youth (including at-risk youth), education, the environment, health (including hospitals), historic preservation and social services. It requests a letter identifying the charitable purpose and proposed use of funds. The page presents these as its areas of interest, spanning cultural, religious, educational, environmental, health, preservation and social-service work, with hospitals and at-risk youth expressly named within those fields.
Themes
- Arts and culture
- Christian organisations
- Children and youth
- Education
- Environment
- Health
- Social services
Geographic Focus
No geographic focus is stated; the filings show grants mainly in Washington, California, Pennsylvania, Maryland, North Carolina and the United States.
How to apply
Send a letter identifying the charitable purpose and proposed use of funds.
Application success factors
- Repeat giving: In its TY2025 filing, 90% of its grant dollars to organisations went to organisations it had also funded in its TY2023 or TY2024 filing.
- Grant size: Across its TY2023, TY2024 and TY2025 filings, half of its 232 grants to organisations were $6,000 or less.
Where grants go
From grants to organisations in the foundation’s filings for tax years 2023–2025.
Grant dollars by state
6 other states: 14%
Outside the US or with no state on the filing: 7%
- The largest single recipient received 16% of grant dollars to organisations.
- In tax year 2025, 90% of grant dollars went to organisations Mark H and Blanche M Harrington Foundation had funded in earlier filings.
- No grants were paid directly to organisations outside the US.
Grants
How much do they typically give?
Share of 84 grants in tax year 2025 by size
Median $9,000 (tax year 2025)
The largest grants to organisations in the foundation’s latest filing:
- Seattle Childrens Hospital Foundation · General use$269,0002025 tax year
- Center for American Liberty · General use$75,0002025 tax year
- Christian Legal Society · General use$50,0002025 tax year
- Grace Fellowiship Church of Costa Mesa · General use$45,0002025 tax year
- Western Foundation, Western Washington University · General use$45,0002025 tax year
- Serve to Lead · General use$40,0002025 tax year
- Family Research Council · General use$32,5002025 tax year
- Olive Crest Child Care Services · General use$30,0002025 tax year
Grants to organisations listed in the foundation’s Form 990-PF filings. Grants to individuals are not shown.
Officers and directors
- Citizen's Business Bank — Corporate Trustee
From the latest Form 990-PF filing
3 years of tax filings
| Year | Total expenses | Grants paid | Assets | Filing document |
|---|---|---|---|---|
| 2023 tax year | $1,155,049 | $1,006,800 | $23,424,003 | Filing for 2023 tax year |
| 2024 tax year | $1,443,476 | $1,127,652 | $23,201,891 | Filing for 2024 tax year |
| 2025 tax year | $1,391,609 | $1,242,000 | $28,213,179 | Filing for 2025 tax year |
Figures from the foundation’s IRS Form 990-PF filings. Assets are at fair market value at year end. The document icon links to each year’s filing on ProPublica Nonprofit Explorer.
Sources
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At a glance
Applying to Mark H and Blanche M Harrington Foundation?
Hinchilla drafts your answers around this funder's priorities, using your organisation's own documents.
No credit card required
Contact
- (626) 405-8335
- Ontario, CA (office of its trustee, Citizens Business Bank)
Applying to Mark H and Blanche M Harrington Foundation?
Hinchilla drafts your answers around this funder's priorities, using your organisation's own documents.
No credit card required
Contact
- (626) 405-8335
- Ontario, CA (office of its trustee, Citizens Business Bank)