Nonprofits in San Mateo, California

Nonprofits in San Mateo, California. Browse 663 public nonprofit profiles. Review organization identities, available filing years, and their complete CharitySense profiles.

Location refers to headquarters recorded in public sources, not an organization’s service area. Classification describes its reported category and does not assess its effectiveness.

Nonprofit profiles

  1. Phi Epsilon Phi Sorority

    EIN 941272902 · Headquarters: SAN MATEO, CA, US · Education · Latest available filing year: 2011 · Primary form: IRS Form 990-N

  2. Philanthropy U Inc

    EIN 810956313 · Headquarters: SAN MATEO, CA, USA · International, Foreign Affairs & National Security · Latest available filing year: 2020 · Primary form: IRS Form 990

  3. Piedemonte Charitable Trust Dated 2497

    EIN 946705153 · Headquarters: SAN MATEO, CA, USA · Human Services · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  4. Pindelski Foundation

    EIN 472035908 · Headquarters: San Mateo, CA, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2019 · Primary form: IRS Form 990-PF

  5. Pop Warner Little Scholars Inc

    EIN 943131912 · Headquarters: San Mateo, CA, US · Recreation & Sports · Latest available filing year: 2015 · Primary form: IRS Form 990-N

  6. Porsche Club of America - Golden Gate Region

    EIN 770048090 · Headquarters: San Mateo, CA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  7. Porter Family Foundation

    EIN 200128645 · Headquarters: SAN MATEO, CA, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  8. Portola Ave 39800 Corp

    EIN 462759205 · Headquarters: SAN MATEO, CA, USA · Community Improvement & Capacity Building · Latest available filing year: 2019 · Primary form: IRS Form 990

  9. Prevent Cruelty to Animals (Pvca)

    EIN 263656362 · Headquarters: SAN MATEO, CA, USA · Animal Related · Latest available filing year: 2025 · Primary form: IRS Form 990

  10. Professional Photographers of the Greater Bay Area Inc

    EIN 237129357 · Headquarters: San Mateo, CA, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  11. Project Ninety Inc

    EIN 237398688 · Headquarters: SAN MATEO, CA, USA · Mental Health & Crisis Intervention · Latest available filing year: 2017 · Primary form: IRS Form 990

  12. Prophet Elijah Media

    EIN 822200025 · Headquarters: San Mateo, CA, US · Religion Related · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  13. PTA Baywood Elementary School

    EIN 237017555 · Headquarters: San Mateo, CA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  14. PTA CA Congress of Parents North Shoreview Montessori PTA

    EIN 946184914 · Headquarters: San Mateo, CA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  15. Pta Cal Congress of Parents Fiesta Gardens International School

    EIN 943184112 · Headquarters: SAN MATEO, CA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  16. PTA Calif Congress of Parents Meadow Hgt

    EIN 946184069 · Headquarters: San Mateo, CA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  17. Pta California Congress of Parents San Mateo Park Elementary Pta

    EIN 946174393 · Headquarters: SAN MATEO, CA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  18. Pta California Congress of Parents Teachers & Students

    EIN 946174544 · Headquarters: San Mateo, CA, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  19. Pta California Congress of Parents Teachers & Students Inc

    EIN 943302025 · Headquarters: San Mateo, CA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  20. Pta California Congress of Parents Teachers & Students Inc

    EIN 946171175 · Headquarters: SAN MATEO, CA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  21. Pta California Congress of Parents Teachers & Students Inc

    EIN 946172298 · Headquarters: SAN MATEO, CA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  22. Pta California Congress of Parents Teachers & Students Inc

    EIN 946183794 · Headquarters: San Mateo, CA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  23. Pta California Congress of Parents Teachers & Students Inc Bayside

    EIN 946171267 · Headquarters: SAN MATEO, CA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  24. Pta California Congress of Parents Teachers Students Inc

    EIN 943196974 · Headquarters: SAN MATEO, CA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  25. Public Data Library Inc

    EIN 884214948 · Headquarters: San Mateo, CA, US · Public & Societal Benefit · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  26. Punchh Foundation

    EIN 850844849 · Headquarters: San Mateo, CA, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2022 · Primary form: IRS Form 990-PF

  27. Radio-television News Directors Association of Northern California

    EIN 942879058 · Headquarters: San Mateo, CA, US · Arts, Culture & Humanities · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  28. Raising Light Foundation Inc

    EIN 392339918 · Headquarters: SAN MATEO, CA, USA · Human Services · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  29. Raul a Tapia Family Foundation

    EIN 770499978 · Headquarters: SAN MATEO, CA, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2014 · Primary form: IRS Form 990-PF

  30. Ray Family Foundation Co Shirley Zhu

    EIN 943288258 · Headquarters: SAN MATEO, CA, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2013 · Primary form: IRS Form 990-PF

  31. Redwood City Cardinals Baseball Club

    EIN 472731992 · Headquarters: SAN MATEO, CA, US · Recreation & Sports · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  32. Redwood Future Foundation

    EIN 394623076 · Headquarters: San Mateo, CA, US · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  33. Reinventmd Foundation

    EIN 413663234 · Headquarters: San Mateo, CA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  34. Responsible Development For Water Tank Hill

    EIN 813014827 · Headquarters: San Mateo, CA, US · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  35. Richard Chartrand Eye Research Foundation C/o David Schwartz

    EIN 930951517 · Headquarters: SAN MATEO, CA, USA · Medical Research · Latest available filing year: 2020 · Primary form: IRS Form 990-PF

  36. Rising Stars Foundation

    EIN 923779906 · Headquarters: San Mateo, CA, USA · Human Services · Latest available filing year: 2025 · Primary form: IRS Form 990

  37. Rod & Gun Shrine Club

    EIN 237362236 · Headquarters: SAN MATEO, CA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  38. Ronnies Family and Child Network Corp

    EIN 463569514 · Headquarters: San Mateo, CA, US · Human Services · Latest available filing year: 2013 · Primary form: IRS Form 990-N

  39. Rotary Club of Foster City

    EIN 942595580 · Headquarters: SAN MATEO, CA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  40. Rotary Club of San Mateo

    EIN 946082704 · Headquarters: SAN MATEO, CA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  41. Rotary Haciendas Inc

    EIN 942978646 · Headquarters: SAN MATEO, CA, USA · Housing & Shelter · Latest available filing year: 2024 · Primary form: IRS Form 990

  42. Rotary International

    EIN 943025651 · Headquarters: San Mateo, CA, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  43. Rupert H Johnson Jr Foundation Rupert H Johnson Jr Trustee

    EIN 943170047 · Headquarters: SAN MATEO, CA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  44. Ryder Institute

    EIN 823188252 · Headquarters: San Mateo, CA, US · Public & Societal Benefit · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  45. Sacramento Street 303 Corp

    EIN 464669562 · Headquarters: SAN MATEO, CA, USA · Community Improvement & Capacity Building · Latest available filing year: 2016 · Primary form: IRS Form 990

  46. Samaritan House

    EIN 237416272 · Headquarters: San Mateo, CA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  47. San Benito County Shrine Club

    EIN 352872916 · Headquarters: SAN MATEO, CA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  48. San Bruno Dog Obedience School Inc

    EIN 943190083 · Headquarters: San Mateo, CA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  49. San Francisco Accordion Club

    EIN 943148553 · Headquarters: San Mateo, CA, US · Arts, Culture & Humanities · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  50. San Francisco Bay Area Water Users Association

    EIN 237222795 · Headquarters: SAN MATEO, CA, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  51. San Francisco Chinese Arts Foundation

    EIN 912092254 · Headquarters: San Mateo, CA, USA · Arts, Culture & Humanities · Latest available filing year: 2011 · Primary form: IRS Form 990

  52. San Francisco Ct4 Royal Order of Jesters

    EIN 937273319 · Headquarters: SAN MATEO, CA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  53. San Francisco Peninsula Organ Academy

    EIN 471016083 · Headquarters: San Mateo, CA, USA · Arts, Culture & Humanities · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  54. San Francisco Sheriffs Air Squadron

    EIN 237182473 · Headquarters: SAN MATEO, CA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  55. San Mateo Adult School Federation of Teachers Aft Cft Afl-cio Local

    EIN 943110263 · Headquarters: San Mateo, CA, US · Employment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  56. San Mateo Arboretum Society Inc

    EIN 510178003 · Headquarters: San Mateo, CA, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  57. San Mateo Cares

    EIN 270205888 · Headquarters: San Mateo, CA, US · Human Services · Latest available filing year: 2014 · Primary form: IRS Form 990-N

  58. San Mateo CC Federation of Teachers AFT 1493

    EIN 942938915 · Headquarters: San Mateo, CA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  59. San Mateo Chamber of Commerce

    EIN 940838880 · Headquarters: San Mateo, CA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  60. San Mateo Charities Inc

    EIN 943324508 · Headquarters: San Mateo, CA, US · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  61. San Mateo Children Museum Foundation Inc

    EIN 200721302 · Headquarters: San Mateo, CA, US · Arts, Culture & Humanities · Latest available filing year: 2007 · Primary form: IRS Form 990-N

  62. San Mateo City Employees Assoc

    EIN 931096544 · Headquarters: San Mateo, CA, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  63. San Mateo City Parks and Recreation Foundation

    EIN 274690768 · Headquarters: San Mateo, CA, USA · Recreation & Sports · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  64. San Mateo Cnty Chptr of the Amer Inst of Architect

    EIN 942861627 · Headquarters: SAN MATEO, CA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  65. San Mateo Co Labor Publishing Co

    EIN 946479160 · Headquarters: San Mateo, CA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  66. San Mateo Consolidated Fire Department Funded HRA Trust

    EIN 852617004 · Headquarters: San Mateo, CA, USA · Mutual & Membership Benefit · Latest available filing year: 2024 · Primary form: IRS Form 990

  67. San Mateo County African Violet Society

    EIN 562483338 · Headquarters: San Mateo, CA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  68. San Mateo County Association of Realtors Inc

    EIN 943207822 · Headquarters: SAN MATEO, CA, USA · Community Improvement & Capacity Building · Latest available filing year: 2024 · Primary form: IRS Form 990

  69. San Mateo County Astronomical Society

    EIN 942448416 · Headquarters: San Mateo, CA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  70. San Mateo County Chapter of the Womens Council of Realtors

    EIN 954335948 · Headquarters: SAN MATEO, CA, USA · Housing & Shelter · Latest available filing year: 2016 · Primary form: IRS Form 990-EZ

  71. San Mateo County Colleges Educational Housing Corporation

    EIN 201880465 · Headquarters: San Mateo, CA, USA · Housing & Shelter · Latest available filing year: 2024 · Primary form: IRS Form 990

  72. San Mateo County Community College District Financing Corporation

    EIN 201670207 · Headquarters: San Mateo, CA, US · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  73. San Mateo County Community Colleges Foundation

    EIN 946133905 · Headquarters: San Mateo, CA, USA · Education · Latest available filing year: 2024 · Primary form: IRS Form 990

  74. San Mateo County Economic Development Association Incorporated

    EIN 941295795 · Headquarters: SAN MATEO, CA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  75. San Mateo County Exposition & Fair Association

    EIN 941253708 · Headquarters: SAN MATEO, CA, USA · Recreation & Sports · Latest available filing year: 2024 · Primary form: IRS Form 990

  76. San Mateo County Fellowship

    EIN 941599460 · Headquarters: SAN MATEO, CA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  77. San Mateo County Genealogical Society

    EIN 942856483 · Headquarters: SAN MATEO, CA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  78. San Mateo County Health Foundation

    EIN 943116070 · Headquarters: San Mateo, CA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  79. San Mateo County Parks and Recreation Foundation

    EIN 943306697 · Headquarters: SAN MATEO, CA, USA · Recreation & Sports · Latest available filing year: 2024 · Primary form: IRS Form 990

  80. San Mateo County Realtors Foundation

    EIN 943163126 · Headquarters: SAN MATEO, CA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  81. San Mateo County School Superintendents Association

    EIN 823484385 · Headquarters: San Mateo, CA, US · Community Improvement & Capacity Building · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  82. San Mateo County Union Community Alliance

    EIN 731656669 · Headquarters: San Mateo, CA, USA · Human Services · Latest available filing year: 2024 · Primary form: IRS Form 990

  83. San Mateo County Women Lawyers Section Educational Foundation

    EIN 943255974 · Headquarters: SAN MATEO, CA, US · Civil Rights, Social Action & Advocacy · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  84. San Mateo Crta - Scholarship and Educational Foundation Inc

    EIN 320277541 · Headquarters: San Mateo, CA, US · Education · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  85. San Mateo Dance Association

    EIN 942911737 · Headquarters: San Mateo, CA, US · Arts, Culture & Humanities · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  86. San Mateo Firefighters Widows and Orphans Dba Mutual Aid Fund

    EIN 946169238 · Headquarters: SAN MATEO, CA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  87. San Mateo Garden Center

    EIN 237222141 · Headquarters: SAN MATEO, CA, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  88. San Mateo Heritage Alliance Inc

    EIN 882159434 · Headquarters: San Mateo, CA, US · Community Improvement & Capacity Building · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  89. San Mateo High School Athletic Boosters

    EIN 463987449 · Headquarters: SAN MATEO, CA, USA · Recreation & Sports · Latest available filing year: 2024 · Primary form: IRS Form 990

  90. San Mateo High School Bearcat Parent Teacher Organization

    EIN 943373211 · Headquarters: SAN MATEO, CA, USA · Education · Latest available filing year: 2023 · Primary form: IRS Form 990-EZ

  91. San Mateo High School Drama Boosters

    EIN 943123215 · Headquarters: SAN MATEO, CA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  92. San Mateo High School Music Boosters

    EIN 942647133 · Headquarters: San Mateo, CA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  93. San Mateo High School Pto and Foundation for Excellence

    EIN 200027218 · Headquarters: SAN MATEO, CA, USA · Education · Latest available filing year: 2024 · Primary form: IRS Form 990

  94. San Mateo Highlands Community Association

    EIN 942926914 · Headquarters: San Mateo, CA, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  95. San Mateo Japanese Youth

    EIN 946175520 · Headquarters: San Mateo, CA, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  96. San Mateo Japanese-american Community Center

    EIN 920194073 · Headquarters: San Mateo, CA, US · Human Services · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  97. San Mateo Kendo Dojo

    EIN 834156619 · Headquarters: San Mateo, CA, US · Recreation & Sports · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  98. San Mateo Lodge 1112 Bpo Elks

    EIN 940838965 · Headquarters: SAN MATEO, CA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  99. San Mateo Masonic Temple Assoc Inc

    EIN 940839075 · Headquarters: San Mateo, CA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  100. San Mateo Master Marlins Inc

    EIN 943084479 · Headquarters: San Mateo, CA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

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