Unknown & Unclassified nonprofits

Unknown & Unclassified nonprofits. Browse 557,756 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 Marcos Pop Warner

    EIN 330561483 · Headquarters: San Marcos, CA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  2. San Marcos Rotary Club

    EIN 237051065 · Headquarters: SAN MARCOS, CA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  3. San Marcos Rotary Club Foundation

    EIN 330457941 · Headquarters: SAN MARCOS, CA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  4. San Marcos Youth Service BureauInc

    EIN 742194683 · Headquarters: San Marcos, TX, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-EZ

  5. San Marin High School All Sports Booster Club

    EIN 943156970 · Headquarters: Novato, CA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  6. San Marin Improvement Association

    EIN 946123746 · Headquarters: Novato, CA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  7. San Marino Alumni Association

    EIN 954377199 · Headquarters: San Marino, CA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  8. San Marino High School Parent Teacher Student Association Inc

    EIN 956207332 · Headquarters: San Marino, CA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  9. San Marino High School Tennis Booster Club

    EIN 462790460 · Headquarters: San Marino, CA, US · Unknown & Unclassified · Latest available filing year: 2013 · Primary form: IRS Form 990-N

  10. San Marino League

    EIN 953280287 · Headquarters: PASADENA, CA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  11. San Marino National Little League Inc

    EIN 953179298 · Headquarters: SAN MARINO, CA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  12. San Marino Police Officers Association

    EIN 953841995 · Headquarters: SAN MARINO, CA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  13. San Marino Pt Affiliates

    EIN 953839982 · Headquarters: SAN MARINO, CA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  14. San Marino Temple Association

    EIN 951833939 · Headquarters: SAN MARINO, CA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  15. San Marino Tennis Foundation

    EIN 952511427 · Headquarters: San Marino, CA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  16. San Marino Unified Teachers Assn Cta Nea

    EIN 952976641 · Headquarters: SAN MARINO, CA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  17. San Marino Womans Club

    EIN 951729087 · Headquarters: San Marino, CA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  18. San Martin De Porres Soup Kitchen

    EIN 850405040 · Headquarters: ESPANOLA, NM, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  19. San Mateans for Affordable Housing

    EIN 851030685 · Headquarters: SACRAMENTO, CA, USA · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-EZ

  20. San Mateans for Affordable Housing Solutions

    EIN 831157149 · Headquarters: Sacramento, CA, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  21. San Mateans for Neighborhood Protections & Affordable Housing

    EIN 844480242 · Headquarters: SACRAMENTO, CA, USA · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990

  22. 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

  23. San Mateo Chamber of Commerce

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

  24. 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

  25. 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

  26. San Mateo Co Convention & Visitors Bureau

    EIN 952748198 · Headquarters: BURLINGAME, CA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  27. 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

  28. 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

  29. 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

  30. San Mateo County Bar Association

    EIN 941638934 · Headquarters: Redwood City, CA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  31. San Mateo County Council of Engineers

    EIN 943149297 · Headquarters: Redwood City, CA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  32. San Mateo County Dental Society

    EIN 941700499 · Headquarters: San Carlos, CA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  33. San Mateo County Dental Society Dental Health Foundation

    EIN 942146658 · Headquarters: San Carlos, CA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  34. 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

  35. San Mateo County Electrical Construction Industry Labor-Mgmnt Cooperation Trust

    EIN 936296324 · Headquarters: Daly City, CA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  36. San Mateo County Farm Bureau

    EIN 941210113 · Headquarters: HALF MOON BAY, CA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  37. San Mateo County Fellowship

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

  38. San Mateo County Fire Chiefs Association

    EIN 943139750 · Headquarters: Portola Valley, CA, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  39. San Mateo County Firefighters Local 2400 District 11

    EIN 900770784 · Headquarters: Burlingame, CA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  40. 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

  41. San Mateo County Health Foundation

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

  42. San Mateo County Historical Association

    EIN 237186194 · Headquarters: REDWOOD CITY, CA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  43. San Mateo County Medical Association

    EIN 941121908 · Headquarters: Foster City, CA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  44. 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

  45. San Mateo County Retired Personnel Association

    EIN 946408770 · Headquarters: El Granada, CA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  46. San Mateo County Sheriff's Office Associ

    EIN 946089448 · Headquarters: REDWOOD CITY, CA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  47. San Mateo County Trial Lawyers Assoc C/o Marina Ewald

    EIN 942771419 · Headquarters: SACRAMENTO, CA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  48. 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

  49. San Mateo Gymnastics Boosters Inc

    EIN 942595566 · Headquarters: BELMONT, CA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  50. San Mateo Harley Owners Group

    EIN 943398418 · Headquarters: Redwood City, CA, US · Unknown & Unclassified · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  51. San Mateo High School Class of 2002

    EIN 463344156 · Headquarters: Foster City, CA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  52. 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

  53. 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

  54. 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

  55. San Mateo Hotel Employees and Restaurant Employees Welfare Fund

    EIN 946081299 · Headquarters: SAN JOSE, CA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  56. San Mateo Japanese Youth

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

  57. 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

  58. 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

  59. 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

  60. 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

  61. 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

  62. San Mateo Parents Club

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

  63. San Mateo Parents Nursery School

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

  64. San Mateo Public Library Foundation

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

  65. San Mateo Road Runners

    EIN 942991540 · Headquarters: Pacifica, CA, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  66. San Mateo-burlingame Auxiliary for Children

    EIN 941251582 · Headquarters: Burlingame, CA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  67. 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

  68. San Miguel Education Center

    EIN 223232973 · Headquarters: PROVIDENCE, RI, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  69. San Miguel Educational Fund

    EIN 237317485 · Headquarters: TELLURIDE, CO, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  70. San Miguel Electric Cooperative Incorporated

    EIN 741937134 · Headquarters: Christine, Texas, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  71. San Miguel Lutheran Church

    EIN 752557870 · Headquarters: Fort Worth, TX, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  72. San Miguel Power Association, Inc.

    EIN 840312816 · Headquarters: Ridgway, CO, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  73. San Miguel Seniors

    EIN 953202142 · Headquarters: SAN MIGUEL, CA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  74. San Onofre Surfing Club

    EIN 951889572 · Headquarters: SAN CLEMENTE, CA, USA · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-EZ

  75. San Pablo Historical and Museum Society

    EIN 942655108 · Headquarters: San Pablo, CA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  76. San Pablo Police Employees Association

    EIN 942761387 · Headquarters: SAN PABLO, CA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  77. San Pablo Renaissance Inc

    EIN 943208274 · Headquarters: OAKLAND, CA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  78. San Pasqual Athletic Booster Assoc

    EIN 330184594 · Headquarters: Escondido, CA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  79. San Pasqual Battlefield Volunteer Association

    EIN 330161282 · Headquarters: Escondido, CA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  80. San Pasqual Foundation

    EIN 953675202 · Headquarters: ARCADIA, CA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  81. San Patricio County Association of Realtors Inc

    EIN 741997181 · Headquarters: PORTLAND, TX, USA · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-EZ

  82. San Patricio County Economic Development Corporation

    EIN 742637723 · Headquarters: Portland, TX, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  83. San Patricio County Friends of Law Enforcement Inc

    EIN 749622323 · Headquarters: SINTON, TX, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  84. San Patricio Electric Cooperative

    EIN 740880813 · Headquarters: Sinton, TX, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  85. San Patricio Restoration Society Inc

    EIN 741956692 · Headquarters: Mathis, TX, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  86. San Patricio-aransas County Farm Bureau

    EIN 741197763 · Headquarters: SINTON, TX, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  87. San Patricio-aransas-refugio Counties Medical Society

    EIN 742593783 · Headquarters: Austin, TX, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  88. San Pedro & Peninsula Homeowners Coalition

    EIN 853254806 · Headquarters: SAN PEDRO, CA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  89. San Pedro Bay Historical Society

    EIN 953024080 · Headquarters: San Pedro, CA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  90. San Pedro Cooperative Nursery School

    EIN 951973876 · Headquarters: San Pedro, CA, USA · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-EZ

  91. San Pedro Neighborhood Association

    EIN 850379664 · Headquarters: Sandia Park, NM, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  92. San Pedro Peninsula Chamber of Commerce

    EIN 951187680 · Headquarters: SAN PEDRO, CA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  93. San Pedro Veterans Alliance Inc

    EIN 815342753 · Headquarters: San Pedro, CA, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  94. San Pedro Youth Coalition Inc

    EIN 330345179 · Headquarters: San Pedro, CA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  95. San Pedro-south Chapter Military Officers Association of America

    EIN 200114313 · Headquarters: San Pedro, CA, US · Unknown & Unclassified · Latest available filing year: 2011 · Primary form: IRS Form 990-N

  96. San Pu Kai

    EIN 953787916 · Headquarters: VISTA, CA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  97. San Rafael Chamber of Commerce

    EIN 940839470 · Headquarters: SAN RAFAEL, CA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  98. San Rafael Firefighters Association

    EIN 237015677 · Headquarters: SAN RAFAEL, CA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  99. San Rafael Guizar Y Valencia

    EIN 364761398 · Headquarters: MERCED, CA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  100. San Rafael High School Alumni Association

    EIN 942501217 · Headquarters: San Rafael, CA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

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