Nonprofits in San Marino, CA
501(c)(3) nonprofit organizations — IRS Exempt Organizations Business Master File (2026-02)
Overview
Source: IRS Exempt Organizations BMFTotal Nonprofits
165
Total Assets
$1.6B
Orgs with >$1M Assets
27
Per 10K Residents
134.4
nonprofits
+232.7% vs 10K-25K avg
Nonprofits by Category
Source: IRS / NTEE ClassificationPhilanthropy34
Arts & Culture26
Education19
Human Services14
Religion14
Housing & Shelter6
Recreation & Sports5
Youth Development4
Community Improvement4
Unknown3
Voluntary Health2
Public Benefit2
Environment1
Animal-Related1
Health Care1
Mental Health1
Crime & Legal1
Food & Agriculture1
Public Safety1
International1
Nonprofits per 10K Residents vs Similar Cities
Source: IRS BMF + Census ACSCompared to cities with population 10,000 - 25,000
Largest Nonprofits in San Marino
Source: IRS Exempt Organizations BMF| Organization | Category | Assets | Income | Est. |
|---|---|---|---|---|
| HENRY E HUNTINGTON LIBRARY & ART GALLERY | Arts & Culture | $1.1B | $596.4M | 1938 |
| WHH FOUNDATION | Philanthropy | $165.6M | $14.8M | 2004 |
| THORNTON FOUNDATION DELAWARE | Philanthropy | $92.3M | $68.0M | 2020 |
| SILENT PARTNER GRANTS | Philanthropy | $51.1M | $17.8M | 2016 |
| UNIVERSAL SUNLIGHT FOUNDATION | Philanthropy | $32.4M | $21.4M | 2009 |
| SOUTHWESTERN ACADEMY | Unknown | $23.0M | $3.6M | 1963 |
| SHI YIN WONG AND WAH LAM FOUNDATION | Philanthropy | $15.1M | $183K | 2015 |
| GREENWOOD FOUNDATION CHARIT IRRV TR 121294 | Philanthropy | $15.0M | $1.3M | 1995 |
| LAM YAU JONG CHARITABLE FOUNDATION | Philanthropy | $13.7M | $3.2M | 2003 |
| URBAN COMMUNITIES PRESERVATION HOUSING CORP | Housing & Shelter | $11.0M | $3.1M | 2000 |
| CHAPMAN FAMILY FOUNDATION | Philanthropy | $6.6M | $220K | 2000 |
| SAN MARINO SCHOOL FOUNDATION | Education | $5.0M | $2.3M | 1980 |
| CHINESE CLUB OF SAN MARINO | Arts & Culture | $4.4M | $1.9M | 1986 |
| ALLAN & LALITA CHARITABLE FOUNDATION | Philanthropy | $4.3M | $902K | 2009 |
| TSENYI DRATSANG BUDDHIST FOUNDATION | Religion | $3.4M | $792K | 2007 |
| D&G CHARITABLE FOUNDATION | Philanthropy | $3.4M | $1.3M | 2022 |
| KINGS BRIDGE FOUNDATION | Philanthropy | $3.3M | $11.8M | 2007 |
| JEANNE WARD FOUNDATION | — | $2.2M | $1.7M | 1982 |
| THE NEGRI FOUNDATION A CALIFORNIA NONPROFIT PUBLIC BENEFIT | — | $2.2M | $2.2M | 1991 |
| CHRISTEN C AND BEN H GARRET FAMILYFOUNDATION | Philanthropy | $2.0M | $442K | 2007 |
| OLD MILL FOUNDATION | Arts & Culture | $1.7M | $303K | 1996 |
| DUNCAN GREAT CAUSE FOUNDATION | — | $1.5M | $3.1M | 2020 |
| GEORGE AND MARY ANN LEAL FOUNDATION | — | $1.5M | $439K | 1994 |
| RALPHS PRATHER RANCH FOUNDATION | — | $1.3M | $51K | 1994 |
| SAN MARINO MOTOR CLASSIC | Philanthropy | $1.2M | $843K | 2012 |
| SAN MARINO ROTARY CHARITIES | Philanthropy | $1.1M | $119K | 1995 |
| ONEONTA CLUB FOUNDATION | — | $1.0M | $493K | 1976 |
| LEE MOY FAMILY FOUNDATION | Philanthropy | $959K | $40K | 2018 |
| WARREN-SODEN-HOPKINS FOUNDATION | — | $845K | $74K | 1993 |
| ORACLE COMMUNITIES CORP | Housing & Shelter | $794K | $18K | 2000 |
| CULTURAL FOUNDATIONS OF ZHENDAI HE USA | Arts & Culture | $766K | $403K | 2018 |
| CALIFORNIA NOTLEY FOUNDATION | Philanthropy | $671K | $294K | 2001 |
| STRUGAR FAMILY FOUNDATION | Philanthropy | $574K | $91K | 2008 |
| ORACLE COMMUNITIES RIALTO 360 CORPORATION | Housing & Shelter | $564K | $1K | 2001 |
| TSAN TSUNG MEMORIAL FOUNDATION | Philanthropy | $555K | $991K | 2008 |
| HILL-HARBISON HOUSE | Youth Development | $524K | $40K | 2003 |
| PTA CALIFORNIA CONGRESS OF PARENTS TEACHERS & STUDENTS INC | — | $478K | $514K | 1967 |
| PTA CALIFORNIA CONGRESS OF PARENTS TEACHERS & STUDENTS INC | — | $459K | $571K | 1967 |
| STEPHEN J WEAVER FOUNDATION INC | Philanthropy | $436K | $161K | 1994 |
| VICKI AND LEWIS SOLMON FAMILY FOUNDATION | Philanthropy | $418K | $107K | 2024 |
| UNIVERSAL CONGRESS FOR UNSETTLED REFUGEES INCORPORATED | Unknown | $408K | $63K | 1995 |
| DAVID AND ELITA BALFOUR FOUNDATION | Philanthropy | $395K | $65K | 2022 |
| TITIAN ATHLETIC BOOSTERS INC | Recreation & Sports | $394K | $401K | 2019 |
| MP ZHANG & ZHU FAMILY FOUNDATION | Philanthropy | $375K | $196K | 2018 |
| KNEIER FAM FOUNDATION | Philanthropy | $353K | $86K | 2004 |
| THE@GARNETTE AND LLOYD MCVEY FAMILY FOUNDATION | Philanthropy | $323K | $50K | 1997 |
| SAN MARINO P T AFFILIATES | — | $308K | $568K | 1986 |
| MY REFUGE HOUSE | International | $301K | $514K | 2009 |
| FORMOSA TITAN FOUNDATION | Education | $299K | $119K | 2006 |
| PROFESSOR HSIEN-CHEN HSIEH MEDICAL ADVANCEMENT SOCIETY | Philanthropy | $270K | $245K | 2016 |
San Marino, CA has 165 registered 501(c)(3) nonprofit organizations with combined assets of $1.6B. The most common category is Philanthropy & Grantmaking, with 34 organizations. 27 nonprofits have assets exceeding $1 million. That works out to 134.4 nonprofits per 10,000 residents. The oldest active nonprofit dates back to 1938.