Nonprofits in California

Nonprofits in California. Browse 229,931 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. International Society for Aerosols in Medicine Inc

    EIN 853309322 · Headquarters: Watsonville, CA, USA · Science & Technology · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  2. International Society for Arts Science and Technology DBA LeonardoISAST

    EIN 942863843 · Headquarters: Oakland, CA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  3. International Society for Better Health Access

    EIN 020731860 · Headquarters: Fresno, CA, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  4. International Society for Children with Cancer

    EIN 731712284 · Headquarters: IRVINE, CA, USA · Diseases, Disorders & Medical Disciplines · Latest available filing year: 2024 · Primary form: IRS Form 990

  5. International Society for Cns Drug Development

    EIN 030457495 · Headquarters: SAN DIEGO, CA, USA · Science & Technology · Latest available filing year: 2025 · Primary form: IRS Form 990

  6. International Society for Computed Tomography

    EIN 421769020 · Headquarters: La Mesa, CA, USA · Health Care · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  7. International Society for Diseases of the Esophagus

    EIN 205805658 · Headquarters: VALENCIA, CA, USA · Diseases, Disorders & Medical Disciplines · Latest available filing year: 2024 · Primary form: IRS Form 990

  8. International Society for Human Cell Research and Applications Inc

    EIN 884277673 · Headquarters: WOODLAND, CA, US · Science & Technology · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  9. International Society for Human Ethology

    EIN 841249067 · Headquarters: SAN DIEGO, CA, USA · Social Science · Latest available filing year: 2024 · Primary form: IRS Form 990

  10. International Society for Human Rescue19

    EIN 863371046 · Headquarters: SANTA MONICA, CA, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-EZ

  11. International Society for Humor Studies

    EIN 921402136 · Headquarters: Oakland, CA, US · Arts, Culture & Humanities · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  12. International Society for Justice Research

    EIN 200318819 · Headquarters: San Francisco, CA, US · Community Improvement & Capacity Building · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  13. International Society for Language Studies Inc

    EIN 200637470 · Headquarters: Laguna Beach, CA, US · Social Science · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  14. International Society for Magnetic Resonance in Medicine

    EIN 232722507 · Headquarters: CONCORD, CA, USA · Health Care · Latest available filing year: 2023 · Primary form: IRS Form 990

  15. International Society for Mannosido and Related Diseases

    EIN 522164838 · Headquarters: SAN JOSE, CA, USA · Medical Research · Latest available filing year: 2025 · Primary form: IRS Form 990

  16. International Society for Military Ethics

    EIN 271212529 · Headquarters: Pacific Grove, CA, US · Social Science · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  17. International Society for Nanoscale Science Computation and Engineering

    EIN 201472291 · Headquarters: LA CRESCENTA, CA, USA · Science & Technology · Latest available filing year: 2024 · Primary form: IRS Form 990

  18. International Society for Pediatric Innovation Inc

    EIN 822979804 · Headquarters: ORANGE, CA, USA · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-EZ

  19. International Society for Pharmaceutical Engineering Inc San Diego Chapter

    EIN 330551783 · Headquarters: VISTA, CA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  20. International Society for Professional Education

    EIN 942596137 · Headquarters: San Francisco, CA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  21. International Society for Professional Identity in Nursing I

    EIN 331870496 · Headquarters: Redondo Beach, CA, US · Education · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  22. International Society for Quality Electronic Design Inc

    EIN 770559324 · Headquarters: LOS ALTOS, CA, USA · Education · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  23. International Society for Self and Identity

    EIN 562047942 · Headquarters: Redwood City, CA, US · Mental Health & Crisis Intervention · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  24. International Society for Technology in Arthroplasty

    EIN 943273552 · Headquarters: Sacramento, CA, USA · Diseases, Disorders & Medical Disciplines · Latest available filing year: 2024 · Primary form: IRS Form 990

  25. International Society for the Comparative Study of Civilizations

    EIN 371220747 · Headquarters: Aptos, CA, US · Social Science · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  26. International Society for the Study of Religion Nature and Culture

    EIN 203924431 · Headquarters: Santa Barbara, CA, US · Education · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  27. International Society for Veterinary Dermatopathology

    EIN 954776621 · Headquarters: Venice, CA, US · Animal Related · Latest available filing year: 2012 · Primary form: IRS Form 990-N

  28. International Society of Acrylic Painters-USA

    EIN 331178149 · Headquarters: SANTA CRUZ, CA, US · Arts, Culture & Humanities · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  29. International Society of Automation

    EIN 770023572 · Headquarters: Bakersfield, CA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  30. International Society of Automation

    EIN 952384557 · Headquarters: Fountain Valley, CA, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  31. International Society of Black Latinos Isbl

    EIN 300702682 · Headquarters: LOS ANGELES, CA, US · Education · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  32. International Society of Certified Employee Benefit Specialists Inc

    EIN 330809839 · Headquarters: Lake Forest, CA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  33. International Society of Certified Employee Benefit Specialists Inc

    EIN 861171147 · Headquarters: San Diego, CA, US · Mutual & Membership Benefit · Latest available filing year: 2012 · Primary form: IRS Form 990-N

  34. International Society of Certified Employee Benefit Specialists Inc

    EIN 943037947 · Headquarters: San Francisco, CA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  35. International Society of Certified Employee Benefit Specialists Inc

    EIN 954020022 · Headquarters: Valencia, CA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  36. International Society of Citriculture

    EIN 953038955 · Headquarters: Riverside, CA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  37. International Society of Citrus Nurserymen

    EIN 823365503 · Headquarters: WATSONVILLE, CA, USA · Food, Agriculture & Nutrition · Latest available filing year: 2023 · Primary form: IRS Form 990-EZ

  38. International Society of Distinguis Hed Achievers Inc

    EIN 412607111 · Headquarters: Los Angeles, CA, US · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  39. International Society of Electrochemistry 1984 Meeting Comm

    EIN 680033372 · Headquarters: Walnut Creek, CA, US · International, Foreign Affairs & National Security · Latest available filing year: 2016 · Primary form: IRS Form 990-N

  40. International Society of Filipinos in Finance & Ac

    EIN 205859036 · Headquarters: BEVERLY HILLS, CA, USA · Education · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  41. International Society of Folk Harpers and Craftsmen Inc

    EIN 954000823 · Headquarters: ANAHEIM, CA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  42. International Society of Hand and Upper Extremity Physiatrists

    EIN 994512172 · Headquarters: Fremont, CA, US · Education · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  43. International Society of Information Fusion

    EIN 770495710 · Headquarters: SACRAMENTO, CA, USA · Science & Technology · Latest available filing year: 2025 · Primary form: IRS Form 990

  44. International Society of Infrared Millimeter and Terahertz Waves

    EIN 270578778 · Headquarters: LA CANADA, CA, USA · Science & Technology · Latest available filing year: 2025 · Primary form: IRS Form 990

  45. International Society of Innovation Methods

    EIN 384017539 · Headquarters: DANVILLE, CA, USA · Science & Technology · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  46. International Society of Innovative Technologies for Endocrinesurgery

    EIN 873213333 · Headquarters: San Francisco, CA, US · Diseases, Disorders & Medical Disciplines · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  47. International Society of Magnetic Resonance Charted

    EIN 363250099 · Headquarters: Irvine, CA, US · Science & Technology · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  48. International Society of Offshore and Polar Engineers

    EIN 841144712 · Headquarters: CUPERTINO, CA, USA · Science & Technology · Latest available filing year: 2024 · Primary form: IRS Form 990

  49. International Society of Regenerative Medicine and Wound Re

    EIN 823735002 · Headquarters: arcadia, CA, US · Medical Research · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  50. International Society of Reproductive Genetics

    EIN 833949728 · Headquarters: IRVINE, CA, US · Education · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  51. International Society Of Service Innovat

    EIN 460977443 · Headquarters: Santa Clara, CA, USA · Community Improvement & Capacity Building · Latest available filing year: 2025 · Primary form: IRS Form 990

  52. International Society of Talking Clock Collectors

    EIN 261327046 · Headquarters: BAKERSFIELD, CA, US · Arts, Culture & Humanities · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  53. International Society of Urological Pathology Inc

    EIN 311561280 · Headquarters: San Francisco, CA, USA · Medical Research · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  54. International Society of Veterinary Ophthalmology

    EIN 464158189 · Headquarters: DAVIS, CA, USA · Animal Related · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  55. International Society of Women in Apologetics

    EIN 274556020 · Headquarters: Sun City, CA, US · Religion Related · Latest available filing year: 2015 · Primary form: IRS Form 990-N

  56. International Softball Academic Association

    EIN 872588462 · Headquarters: Paramount, CA, US · Recreation & Sports · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  57. International Sourdough Reunion

    EIN 911505468 · Headquarters: BONITA, CA, US · Recreation & Sports · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  58. International Sous Vide Association Foundation

    EIN 884138051 · Headquarters: Redondo Beach, CA, US · Food, Agriculture & Nutrition · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  59. International South California Wethepeople Leaders Alliance

    EIN 933418854 · Headquarters: LOS ANGELES, CA, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  60. International Space Elevator Consortium

    EIN 800302896 · Headquarters: Santa Ana, CA, US · Science & Technology · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  61. International Space Safety Foundation

    EIN 260443109 · Headquarters: Redding, CA, USA · Education · Latest available filing year: 2020 · Primary form: IRS Form 990-PF

  62. International Spine & Brain Foundation Inc

    EIN 300446613 · Headquarters: Fresno, CA, US · Diseases, Disorders & Medical Disciplines · Latest available filing year: 2013 · Primary form: IRS Form 990-N

  63. International Spiritual Literature and Arts Center

    EIN 843401684 · Headquarters: Norco, CA, US · Arts, Culture & Humanities · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  64. International Sport Collaborative

    EIN 923161557 · Headquarters: San Jose, CA, USA · Youth Development · Latest available filing year: 2025 · Primary form: IRS Form 990

  65. International Sport Union Inc

    EIN 262065193 · Headquarters: VAN NUYS, CA, USA · Recreation & Sports · Latest available filing year: 2025 · Primary form: IRS Form 990

  66. International Sports Agency Childrens Foundation

    EIN 271316809 · Headquarters: Irvine, CA, US · Youth Development · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  67. International Sports Group Inc

    EIN 330240950 · Headquarters: LA VERNE, CA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  68. International Sports Heroes Inc

    EIN 943103398 · Headquarters: SAN RAFAEL, CA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  69. International Sri Krishna Mandir Los Angeles Inc

    EIN 880792562 · Headquarters: Irvine, CA, USA · Religion Related · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  70. International Star Class Yacht Racing Assoc

    EIN 131556216 · Headquarters: SAN DIEGO, CA, USA · Recreation & Sports · Latest available filing year: 2024 · Primary form: IRS Form 990

  71. International Stem Education Association

    EIN 823049675 · Headquarters: Torrance, CA, US · Education · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  72. International Stem Education Foundation

    EIN 833528204 · Headquarters: OAK PARK, CA, US · Education · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  73. International Stem Society

    EIN 473030192 · Headquarters: GLENDALE, CA, US · International, Foreign Affairs & National Security · Latest available filing year: 2017 · Primary form: IRS Form 990-N

  74. International Stills Disease Foundation Inc

    EIN 593721417 · Headquarters: IDYLLWILD, CA, US · Health Care · Latest available filing year: 2018 · Primary form: IRS Form 990-N

  75. International Stinson Club

    EIN 834008136 · Headquarters: Fair Oaks, CA, US · Human Services · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  76. International Student Environmental Coalition

    EIN 822789272 · Headquarters: Los Angeles, CA, US · Environment · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  77. International Student Home

    EIN 812317957 · Headquarters: San Jose, CA, US · Arts, Culture & Humanities · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  78. International Student Mentorship Program

    EIN 851192913 · Headquarters: Alameda, CA, US · Education · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  79. International Student Pantry Inc

    EIN 455084737 · Headquarters: REDLANDS, CA, US · Food, Agriculture & Nutrition · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  80. International Student Volunteers Inc

    EIN 953805759 · Headquarters: YORBA LINDA, CA, USA · Religion Related · Latest available filing year: 2017 · Primary form: IRS Form 990-EZ

  81. International Students Outreach

    EIN 942645419 · Headquarters: Mountain View, CA, US · Religion Related · Latest available filing year: 2018 · Primary form: IRS Form 990-N

  82. International Students Rights Center

    EIN 271299322 · Headquarters: LOS ANGELES, CA, US · Social Science · Latest available filing year: 2015 · Primary form: IRS Form 990-N

  83. International Students Services Center

    EIN 994518444 · Headquarters: Santa Clarita, CA, USA · Education · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  84. International Studies Language Academy

    EIN 475499852 · Headquarters: Glendale, CA, US · Education · Latest available filing year: 2018 · Primary form: IRS Form 990-N

  85. International Study Group for Stem Cell Therapy

    EIN 261640082 · Headquarters: Sacramento, CA, US · Medical Research · Latest available filing year: 2011 · Primary form: IRS Form 990-N

  86. International Stunt Association

    EIN 953651205 · Headquarters: SHERMAN OAKS, CA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  87. International Support for the Impacted Inc

    EIN 852502205 · Headquarters: Manhattan Beach, CA, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  88. International Support Network of Alienated Families Inc

    EIN 273787757 · Headquarters: Tarzana, CA, US · Human Services · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  89. International Surf Festival

    EIN 954233636 · Headquarters: Manhattan Beach, CA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  90. International Surf Lifesaving Association

    EIN 263679133 · Headquarters: Huntington Beach, CA, US · Education · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  91. International Surf Therapy Organization

    EIN 825334056 · Headquarters: Manhattan Beach, CA, USA · Recreation & Sports · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  92. International Surfing Association

    EIN 330660195 · Headquarters: LA JOLLA, CA, USA · Recreation & Sports · Latest available filing year: 2016 · Primary form: IRS Form 990

  93. International Surfing Association Inc

    EIN 272105969 · Headquarters: CARDIFF, CA, USA · Recreation & Sports · Latest available filing year: 2024 · Primary form: IRS Form 990

  94. International Surgical Group Inc

    EIN 472729803 · Headquarters: La Canada Flintridge, CA, US · Health Care · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  95. International Sustainable Systems Research Center

    EIN 571164239 · Headquarters: Diamond Bar, CA, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  96. International Swaminarayan Satsang Org

    EIN 222290410 · Headquarters: NORWALK, CA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  97. International Sweat Equity Association

    EIN 413830003 · Headquarters: Buellton, CA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  98. International Swimwear Activewear Market

    EIN 953885417 · Headquarters: NORTH HOLLYWOOD, CA, USA · Recreation & Sports · Latest available filing year: 2018 · Primary form: IRS Form 990

  99. International Tae-ki A-za-heun Martial Arts Federation

    EIN 823064842 · Headquarters: ARCADIA, CA, US · Public & Societal Benefit · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  100. International Teacher Placement Service

    EIN 300135523 · Headquarters: Irvine, CA, US · Education · Latest available filing year: 2015 · Primary form: IRS Form 990-N

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