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. San Mateo Medical Center Volunteers

    EIN 942332280 · Headquarters: SAN MATEO, CA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  2. San Mateo National Little League

    EIN 521245539 · Headquarters: SAN MATEO, CA, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-EZ

  3. San Mateo Nippon Gakuyen

    EIN 941546519 · Headquarters: San Mateo, CA, USA · Arts, Culture & Humanities · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  4. San Mateo Parents Club

    EIN 943200861 · Headquarters: San Mateo, CA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  5. San Mateo Parents Nursery School

    EIN 941326531 · Headquarters: SAN MATEO, CA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  6. San Mateo Park Neighborhood Association

    EIN 562631949 · Headquarters: San Mateo, CA, US · Community Improvement & Capacity Building · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  7. San Mateo Park School Foundation

    EIN 943222986 · Headquarters: SAN MATEO, CA, USA · Education · Latest available filing year: 2016 · Primary form: IRS Form 990-EZ

  8. San Mateo Police Activities League Inc

    EIN 311593896 · Headquarters: San Mateo, CA, USA · Youth Development · Latest available filing year: 2024 · Primary form: IRS Form 990

  9. San Mateo Police Department K-9 Unit Inc

    EIN 861900573 · Headquarters: San Mateo, CA, US · Crime & Legal Related · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  10. San Mateo Police Officers' Association

    EIN 300446257 · Headquarters: SAN MATEO, CA, USA · Community Improvement & Capacity Building · Latest available filing year: 2024 · Primary form: IRS Form 990

  11. San Mateo Pony-colt Baseball League

    EIN 943196310 · Headquarters: San Mateo, CA, US · Recreation & Sports · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  12. San Mateo Public Library Foundation

    EIN 943191775 · Headquarters: San Mateo, CA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  13. San Mateo Rotary Foundation

    EIN 237101037 · Headquarters: SAN MATEO, CA, USA · Community Improvement & Capacity Building · Latest available filing year: 2024 · Primary form: IRS Form 990

  14. San Mateo Sister City Association

    EIN 941588552 · Headquarters: San Mateo, CA, USA · International, Foreign Affairs & National Security · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  15. San Mateo Track Club

    EIN 843260161 · Headquarters: San Mateo, CA, US · Recreation & Sports · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  16. San Mateo Youth Softball Association

    EIN 943065828 · Headquarters: SAN MATEO, CA, USA · Recreation & Sports · Latest available filing year: 2024 · Primary form: IRS Form 990

  17. San Mateo-Foster City Chapter of National League of Young Men Inc

    EIN 871970115 · Headquarters: SAN MATEO, CA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  18. Scanlan Charitable Trust

    EIN 942577660 · Headquarters: SAN MATEO, CA, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2019 · Primary form: IRS Form 990-PF

  19. School Nurses Association of Santa Clara County

    EIN 270976191 · Headquarters: SAN MATEO, CA, US · Health Care · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  20. School of Italian Language & Culture

    EIN 237098419 · Headquarters: San Mateo, CA, USA · Arts, Culture & Humanities · Latest available filing year: 2015 · Primary form: IRS Form 990-EZ

  21. Second Chance Project

    EIN 943271085 · Headquarters: San Mateo, CA, US · Youth Development · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  22. Self Reliance Inc

    EIN 260768998 · Headquarters: San Mateo, CA, US · Human Services · Latest available filing year: 2014 · Primary form: IRS Form 990-N

  23. Shaker S Charitable Foundation

    EIN 842476504 · Headquarters: San Mateo, CA, US · Youth Development · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  24. Shaping Youth Inc

    EIN 202194283 · Headquarters: San Mateo, CA, US · Recreation & Sports · Latest available filing year: 2010 · Primary form: IRS Form 990-N

  25. Shi and Xu Foundation

    EIN 331588866 · Headquarters: San Mateo, CA, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  26. Shingon Mikkyo Kunimiyama Daikokuji America

    EIN 461003374 · Headquarters: SAN MATEO, CA, US · Religion Related · Latest available filing year: 2017 · Primary form: IRS Form 990-N

  27. Shopping for a Change

    EIN 271541287 · Headquarters: SAN MATEO, CA, USA · International, Foreign Affairs & National Security · Latest available filing year: 2020 · Primary form: IRS Form 990-EZ

  28. Sikh Gurdwara of San Francisco

    EIN 455179643 · Headquarters: San Mateo, CA, US · Religion Related · Latest available filing year: 2013 · Primary form: IRS Form 990-N

  29. Silicon Valley Showcase Foundation Corporation

    EIN 923584973 · Headquarters: SAN MATEO, CA, USA · Recreation & Sports · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  30. Silicon Vally Software Technology Association

    EIN 030418578 · Headquarters: San Mateo, CA, US · Science & Technology · Latest available filing year: 2007 · Primary form: IRS Form 990-N

  31. SJ 316 Alfa Y Omega

    EIN 900418370 · Headquarters: San Mateo, CA, USA · Religion Related · Latest available filing year: 2016 · Primary form: IRS Form 990-EZ

  32. Slow Glen Park

    EIN 934446368 · Headquarters: San Mateo, CA, US · Community Improvement & Capacity Building · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  33. Sly Foxxe Productions

    EIN 473882081 · Headquarters: San Mateo, CA, US · Arts, Culture & Humanities · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  34. Small Schools Intermediate League

    EIN 811843609 · Headquarters: SAN MATEO, CA, US · Education · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  35. Smith College Club of the Peninsula

    EIN 943335283 · Headquarters: San Mateo, CA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  36. Society of St Vincent De Paul Particular Council of San Mateo Inc

    EIN 900768822 · Headquarters: SAN MATEO, CA, USA · Human Services · Latest available filing year: 2023 · Primary form: IRS Form 990

  37. Society of St Vincent De Paul Particular Council of San Mateo Inc

    EIN 941375833 · Headquarters: SAN MATEO, CA, USA · Human Services · Latest available filing year: 2023 · Primary form: IRS Form 990

  38. Sone Philanthropy Inc

    EIN 853397356 · Headquarters: San Mateo, CA, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  39. Sonrisas Dental Health Inc

    EIN 943390196 · Headquarters: SAN MATEO, CA, USA · Health Care · Latest available filing year: 2024 · Primary form: IRS Form 990

  40. Soroptimist International of the Americas Inc

    EIN 946107886 · Headquarters: San Mateo, CA, US · Community Improvement & Capacity Building · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  41. South Bay Shrine Club

    EIN 237134081 · Headquarters: SAN MATEO, CA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  42. South First Street 27 Corp

    EIN 393842887 · Headquarters: SAN MATEO, CA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  43. Sowing Futuros

    EIN 933553727 · Headquarters: San Mateo, CA, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  44. Spiritual Assembly of the Bahais Of

    EIN 943188209 · Headquarters: San Mateo, CA, US · Religion Related · Latest available filing year: 2008 · Primary form: IRS Form 990-N

  45. Srcs

    EIN 332669047 · Headquarters: San Mateo, CA, US · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  46. St Clare Apartments Inc C/o St Francis Center

    EIN 943252567 · Headquarters: SAN MATEO, CA, USA · Housing & Shelter · Latest available filing year: 2023 · Primary form: IRS Form 990

  47. St James African Methodist Episcopal Zion Church

    EIN 946133137 · Headquarters: San Mateo, CA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  48. St Johns Cemetery Graves Association

    EIN 941294947 · Headquarters: SAN MATEO, CA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  49. St Johns Volunteers Dba Bookside Convalescent Hospital

    EIN 942506931 · Headquarters: SAN MATEO, CA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  50. St. James Community Development Corporation

    EIN 384137842 · Headquarters: San Mateo, CA, United States · Community Improvement & Capacity Building · Latest available filing year: 2024 · Primary form: IRS Form 990

  51. Stanbridge Academy

    EIN 237379082 · Headquarters: SAN MATEO, CA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  52. Strength in Paws Inc

    EIN 991481409 · Headquarters: San Mateo, CA, US · Animal Related · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  53. Students College Bound

    EIN 472232574 · Headquarters: San Mateo, CA, US · Education · Latest available filing year: 2018 · Primary form: IRS Form 990-N

  54. Suitcase Clinic Community

    EIN 475664137 · Headquarters: SAN MATEO, CA, US · Human Services · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  55. Sunrise Rotary Club of San Mateo Charitable Foundation

    EIN 943211644 · Headquarters: San Mateo, CA, US · Education · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  56. Sustainable San Mateo County

    EIN 481265207 · Headquarters: San Mateo, CA, USA · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990

  57. Tahdah Foundation

    EIN 813003647 · Headquarters: SAN MATEO, CA, USA · Youth Development · Latest available filing year: 2024 · Primary form: IRS Form 990

  58. Taulama For Tongans

    EIN 680488293 · Headquarters: San Mateo, CA, USA · Health Care · Latest available filing year: 2023 · Primary form: IRS Form 990

  59. Teacher First Foundation

    EIN 412405221 · Headquarters: SAN MATEO, CA, USA · Education · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  60. Team Max Together Against Alexander Disease

    EIN 994232496 · Headquarters: San Mateo, CA, US · Medical Research · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  61. Tech Access

    EIN 833121421 · Headquarters: San Mateo, CA, US · Education · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  62. The Avalon Academy

    EIN 201651912 · Headquarters: SAN MATEO, CA, USA · Education · Latest available filing year: 2024 · Primary form: IRS Form 990

  63. The Bakers Dozen

    EIN 943327232 · Headquarters: SAN MATEO, CA, US · Arts, Culture & Humanities · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  64. The Ball Club Alumni Association

    EIN 811036636 · Headquarters: San Mateo, CA, US · Education · Latest available filing year: 2017 · Primary form: IRS Form 990-N

  65. The Ballroom Spirit Foundation

    EIN 823112381 · Headquarters: SAN MATEO, CA, USA · Arts, Culture & Humanities · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  66. The Baszucki Family Foundation

    EIN 320660398 · Headquarters: SAN MATEO, CA, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  67. The Bishop Mark J Hurley Fund C/o Alannah Hurley Chase

    EIN 930993943 · Headquarters: SAN MATEO, CA, USA · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-PF

  68. The Burkard School

    EIN 474322966 · Headquarters: San Mateo, CA, USA · Education · Latest available filing year: 2024 · Primary form: IRS Form 990

  69. The Carey School

    EIN 943085954 · Headquarters: SAN MATEO, CA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  70. The Courtney Roberts and Steve Preston Family Foundation

    EIN 260271526 · Headquarters: SAN MATEO, CA, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  71. The Cultivate Foundation

    EIN 825019930 · Headquarters: SAN MATEO, CA, USA · International, Foreign Affairs & National Security · Latest available filing year: 2020 · Primary form: IRS Form 990-EZ

  72. The Day School Foundation

    EIN 943240988 · Headquarters: SAN MATEO, CA, USA · Education · Latest available filing year: 2024 · Primary form: IRS Form 990

  73. The Draper Foundation

    EIN 943256415 · Headquarters: SAN MATEO, CA, USA · Education · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  74. The Earth Awards Foundation Fka Force of Nature Inc

    EIN 203470823 · Headquarters: SAN MATEO, CA, USA · Public Safety, Disaster Preparedness & Relief · Latest available filing year: 2019 · Primary form: IRS Form 990-EZ

  75. The Elfenworks Foundation

    EIN 205522254 · Headquarters: SAN MATEO, CA, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  76. The Eric and Lulu Roberts Family Foundation

    EIN 260271567 · Headquarters: SAN MATEO, CA, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  77. The Evergreen Education Foundation

    EIN 680474814 · Headquarters: SAN MATEO, CA, USA · Education · Latest available filing year: 2024 · Primary form: IRS Form 990

  78. The Forest Rose Leaf Family Foundation

    EIN 874319193 · Headquarters: SAN MATEO, CA, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  79. The Gathering

    EIN 752726170 · Headquarters: SAN MATEO, CA, USA · Arts, Culture & Humanities · Latest available filing year: 2024 · Primary form: IRS Form 990

  80. The George Feely Scholorship Foundation

    EIN 943253208 · Headquarters: San Mateo, CA, US · Education · Latest available filing year: 2007 · Primary form: IRS Form 990-N

  81. The Helen Diller Foundation

    EIN 813945624 · Headquarters: SAN MATEO, CA, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  82. The Lijin Guohua Foundation

    EIN 205651639 · Headquarters: SAN MATEO, CA, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  83. The Lyda & Rico Deluca Foundation Inc

    EIN 941739033 · Headquarters: SAN MATEO, CA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  84. The Marie Kendrick Otto Foundation

    EIN 943271405 · Headquarters: SAN MATEO, CA, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  85. The Mark and Kwala Roberts Family Foundation

    EIN 260271476 · Headquarters: SAN MATEO, CA, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  86. The Marvin and Nancy Dennis Family Foundation

    EIN 943270051 · Headquarters: SAN MATEO, CA, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  87. The Middleton Foundation

    EIN 943117882 · Headquarters: SAN MATEO, CA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  88. The Mystical Humanity of Christ

    EIN 943339818 · Headquarters: SAN MATEO, CA, USA · Religion Related · Latest available filing year: 2024 · Primary form: IRS Form 990

  89. The O'brien Family Foundation

    EIN 522390855 · Headquarters: SAN MATEO, CA, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  90. The Odyssey School

    EIN 943278867 · Headquarters: SAN MATEO, CA, USA · Education · Latest available filing year: 2024 · Primary form: IRS Form 990

  91. The Peninsula Bridge Program

    EIN 943226017 · Headquarters: SAN MATEO, CA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  92. The Persian American Society

    EIN 770215220 · Headquarters: SAN MATEO, CA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  93. The Potter Family Foundation

    EIN 821726161 · Headquarters: SAN MATEO, CA, USA · Education · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  94. The Robert I & Lien Q Chen Family Foundation

    EIN 201885060 · Headquarters: San Mateo, CA, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  95. The Roberts Foundation

    EIN 942967074 · Headquarters: SAN MATEO, CA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  96. The Sholom Fund

    EIN 464399373 · Headquarters: SAN MATEO, CA, US · Religion Related · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  97. The Spring Inc

    EIN 912139972 · Headquarters: SAN MATEO, CA, USA · Religion Related · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  98. The Sydney and Zelda Levin Family Foundation

    EIN 912143952 · Headquarters: SAN MATEO, CA, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2011 · Primary form: IRS Form 990-PF

  99. The Tree by the River Foundation Inc

    EIN 203825567 · Headquarters: SAN MATEO, CA, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  100. The Wolfe Foundation

    EIN 376027471 · Headquarters: San Mateo, CA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

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