Unknown & Unclassified nonprofits in California

Unknown & Unclassified nonprofits in California. Browse 48,218 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. Sigma Alpha Epsilon Fraternity

    EIN 922925198 · Headquarters: Goleta, CA, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  2. Sigma Alpha Epsilon Fraternity

    EIN 933906645 · Headquarters: Fullerton, CA, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  3. Sigma Alpha Epsilon Fraternity

    EIN 956227480 · Headquarters: Northridge, CA, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  4. Sigma Alpha Epsilon of University California Merced

    EIN 800274925 · Headquarters: Merced, CA, US · Unknown & Unclassified · Latest available filing year: 2012 · Primary form: IRS Form 990-N

  5. Sigma Alpha Epsilon Pi

    EIN 814355923 · Headquarters: Santa Cruz, CA, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  6. Sigma Alpha Epsilon Pi - Omicron Chapter

    EIN 472151005 · Headquarters: Van Nuys, CA, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  7. Sigma Alpha Epsilon Pi Nu

    EIN 812299496 · Headquarters: Isla Vista, CA, US · Unknown & Unclassified · Latest available filing year: 2017 · Primary form: IRS Form 990-N

  8. Sigma Alpha Epsilon Pi Sorority

    EIN 473540014 · Headquarters: Davis, CA, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  9. Sigma Alpha Epsilon Redwood Empire Area Alumni Association

    EIN 465739801 · Headquarters: Sacramento, CA, US · Unknown & Unclassified · Latest available filing year: 2015 · Primary form: IRS Form 990-N

  10. Sigma Alpha Mu Fraternity

    EIN 311235020 · Headquarters: San Diego, CA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  11. Sigma Alpha Mu Fraternity

    EIN 510240501 · Headquarters: Davis, CA, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  12. Sigma Alpha Mu Fraternity Sigma Sigma Chapter

    EIN 510240500 · Headquarters: BERKELEY, CA, USA · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990

  13. Sigma Alpha Sorority

    EIN 316047264 · Headquarters: BAKERSFIELD, CA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  14. Sigma Chi - Alpha Upsilon Chapter

    EIN 951222430 · Headquarters: Los Angeles, CA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  15. Sigma Chi - Delta Eta Chapter

    EIN 951716023 · Headquarters: Los Angeles, CA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  16. Sigma Chi Fraternity

    EIN 330140394 · Headquarters: POMONA, CA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  17. Sigma Chi Fraternity

    EIN 800339463 · Headquarters: Davis, CA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  18. Sigma Chi Fraternity

    EIN 823140489 · Headquarters: SAN DIEGO, CA, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  19. Sigma Chi Fraternity

    EIN 954730642 · Headquarters: Malibu, CA, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  20. Sigma Chi Fraternity Epsilon Theta Chapter

    EIN 941242287 · Headquarters: San Jose, CA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  21. Sigma Chi Fraternity Eta Sigma Chapter

    EIN 050537527 · Headquarters: IRVINE, CA, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-EZ

  22. Sigma Chi Fraternity Housing Corp-f

    EIN 770005955 · Headquarters: FRESNO, CA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  23. Sigma Chi Fraternity Kappa Theta Chapter

    EIN 680385733 · Headquarters: Chico, CA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  24. Sigma Chi Fraternity Mu Beta Chapter Cal State U San Marcos

    EIN 474947496 · Headquarters: SAN MARCOS, CA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  25. Sigma Delta Epsilon Graduate Women in Science Inc

    EIN 330250384 · Headquarters: Long Beach, CA, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  26. Sigma Delta Epsilon Graduate Womens Scientific Frat

    EIN 813819501 · Headquarters: Los Angeles, CA, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  27. Sigma Epsilon Omega National Fraternity

    EIN 851492789 · Headquarters: Sacramento, CA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  28. Sigma Epsilon Omega National Fraternity - Alpha Alumni Chapter

    EIN 861802114 · Headquarters: Sacramento, CA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  29. Sigma Epsilon Omega National Fraternity - Alpha Chpater

    EIN 861840526 · Headquarters: Sacramento, CA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  30. Sigma Epsilon Omega National Fraternity - Alpha Housing Corpora

    EIN 871482418 · Headquarters: Sacramento, CA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  31. Sigma Gamma Rho Sorority

    EIN 851036650 · Headquarters: SAN DIEGO, CA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  32. Sigma Gamma Rho Sorority Inc

    EIN 205019337 · Headquarters: EASTVALE, CA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  33. Sigma Gamma Rho Sorority Inc

    EIN 205965868 · Headquarters: San Diego, CA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  34. Sigma Gamma Rho Sorority Inc

    EIN 270502414 · Headquarters: HAYWARD, CA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  35. Sigma Gamma Rho Sorority Inc

    EIN 311239025 · Headquarters: Sacramento, CA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  36. Sigma Gamma Rho Sorority Inc

    EIN 311321575 · Headquarters: Sacramento, CA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  37. Sigma Gamma Rho Sorority Inc

    EIN 311321576 · Headquarters: LONG BEACH, CA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  38. Sigma Gamma Rho Sorority Inc

    EIN 311321651 · Headquarters: LOS ANGELES, CA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  39. Sigma Gamma Rho Sorority Inc

    EIN 311327785 · Headquarters: EMERYVILLE, CA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  40. Sigma Gamma Rho Sorority Inc

    EIN 320211927 · Headquarters: Torrance, CA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  41. Sigma Gamma Rho Sorority Inc

    EIN 320388349 · Headquarters: LOS ANGELES, CA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  42. Sigma Gamma Rho Sorority Inc

    EIN 364086913 · Headquarters: RIVERSIDE, CA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  43. Sigma Gamma Rho Sorority Inc

    EIN 364090297 · Headquarters: CULVER CITY, CA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  44. Sigma Gamma Rho Sorority Inc

    EIN 364093454 · Headquarters: LOS ANGELES, CA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  45. Sigma Gamma Rho Sorority Inc

    EIN 364136815 · Headquarters: LOS ANGELES, CA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  46. Sigma Gamma Rho Sorority Inc

    EIN 364766286 · Headquarters: HAYWARD, CA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  47. Sigma Gamma Rho Sorority Inc

    EIN 384040178 · Headquarters: Mira Loma, CA, US · Unknown & Unclassified · Latest available filing year: 2017 · Primary form: IRS Form 990-N

  48. Sigma Gamma Rho Sorority Inc

    EIN 470984147 · Headquarters: LOS ANGELES, CA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  49. Sigma Gamma Rho Sorority Inc

    EIN 471254229 · Headquarters: BAKERSFIELD, CA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  50. Sigma Gamma Rho Sorority Inc

    EIN 611546658 · Headquarters: Los Angeles, CA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  51. Sigma Gamma Rho Sorority Inc

    EIN 770663859 · Headquarters: San Francisco, CA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  52. Sigma Gamma Rho Sorority Inc

    EIN 800608374 · Headquarters: EASTVALE, CA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  53. Sigma Gamma Rho Sorority Inc

    EIN 830589477 · Headquarters: BAKERSFIELD, CA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  54. Sigma Gamma Rho Sorority Inc

    EIN 854046241 · Headquarters: VICTORVILLE, CA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  55. Sigma Gamma Rho Sorority Inc

    EIN 911923822 · Headquarters: HEMET, CA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  56. Sigma Gamma Rho Sorority Inc

    EIN 911949294 · Headquarters: INGLEWOOD, CA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  57. Sigma Gamma Rho Sorority Inc

    EIN 912024225 · Headquarters: CARSON, CA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  58. Sigma Gamma Rho Sorority Inc

    EIN 912047296 · Headquarters: HAYWARD, CA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  59. Sigma Gamma Rho Sorority Inc

    EIN 912136330 · Headquarters: LANCASTER, CA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  60. Sigma Gamma Rho Sorority Inc

    EIN 956196226 · Headquarters: LOS ANGELES, CA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  61. Sigma Gamma Rho Sorority Inc - Delta Zeta Sigma Chapter

    EIN 823479900 · Headquarters: Compton, CA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  62. Sigma Gamma Rho Sorority Inc - Tau Lambda

    EIN 813208105 · Headquarters: Oceanside, CA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  63. Sigma Gamma Rho Sorority Inc Delta Gamma Chapter San Diego State

    EIN 510214051 · Headquarters: SAN DIEGO, CA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  64. Sigma Nu - Epsilon Pi Chapter

    EIN 951667045 · Headquarters: Los Angeles, CA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  65. Sigma Nu Alumni Scholarship Fund

    EIN 956193282 · Headquarters: Los Angeles, CA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  66. Sigma Nu Aztecs for Knowledge & Education Inc

    EIN 812852142 · Headquarters: SAN DIEGO, CA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  67. Sigma Nu Epsilon Omicron Chapter

    EIN 952528365 · Headquarters: Los Angeles, CA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  68. Sigma Nu Fraternity

    EIN 364662586 · Headquarters: Northridge, CA, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  69. Sigma Nu Fraternity

    EIN 946136603 · Headquarters: Clovis, CA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  70. Sigma Nu Iota Kappa Chapter Housing Corporation

    EIN 237384355 · Headquarters: SAN JOSE, CA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  71. Sigma Nu Lambda Omicron

    EIN 465694036 · Headquarters: Irvine, CA, US · Unknown & Unclassified · Latest available filing year: 2014 · Primary form: IRS Form 990-N

  72. Sigma Phi Alpha Dental Hygiene Honor Society

    EIN 352430028 · Headquarters: Chula Vista, CA, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  73. Sigma Phi Alpha Dental Hygiene Honor Society

    EIN 363755596 · Headquarters: Burbank, CA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  74. Sigma Phi Alpha Dental Hygiene Honor Society

    EIN 364039962 · Headquarters: woodland hills, CA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  75. Sigma Phi Alpha Dental Hygiene Honor Society

    EIN 453345293 · Headquarters: Anaheim, CA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  76. Sigma Phi Alpha Dental Hygiene Honor Society

    EIN 956149461 · Headquarters: Loma Linda, CA, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  77. Sigma Phi Educational Foundation

    EIN 942764528 · Headquarters: Moraga, CA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  78. Sigma Phi Epsilon Ca Iota

    EIN 422752806 · Headquarters: CATHEDRAL CTY, CA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  79. Sigma Phi Epsilon California Eta Chapter

    EIN 946138710 · Headquarters: Davis, CA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  80. Sigma Phi Epsilon Fraternity California Alpha Chapter

    EIN 942965674 · Headquarters: Berkeley, CA, USA · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-EZ

  81. Sigma Phi Epsilon Fraternity California Chi Chapter

    EIN 954566487 · Headquarters: Glendale, CA, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-EZ

  82. Sigma Phi Epsilon Fraternity California Psi Chapter

    EIN 911810577 · Headquarters: MALIBU, CA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  83. Sigma Phi Epsilon Fraternity Inc

    EIN 201096816 · Headquarters: Cathedral City, CA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  84. Sigma Phi Epsilon Fraternity Inc

    EIN 330560212 · Headquarters: San Bernardino, CA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  85. Sigma Phi Epsilon Fraternity Inc

    EIN 812888288 · Headquarters: Sacremento, CA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  86. Sigma Phi Epsilon Fraternity Inc

    EIN 872307453 · Headquarters: San Luis Obispo, CA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  87. Sigma Phi Epsilon Fraternity Inc

    EIN 956149972 · Headquarters: Carlsbad, CA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  88. Sigma Phi Epsilon Fraternity Inc California Beta Beta Chapter

    EIN 911937409 · Headquarters: SAN DIEGO, CA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  89. Sigma Phi Gamma International Sorority Inc

    EIN 205053446 · Headquarters: Oroville, CA, US · Unknown & Unclassified · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  90. Sigma Phi Gamma International Sorority Inc

    EIN 330410741 · Headquarters: Hemet, CA, US · Unknown & Unclassified · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  91. Sigma Phi Gamma International Sorority Inc

    EIN 510171147 · Headquarters: Anaheim, CA, US · Unknown & Unclassified · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  92. Sigma Phi Gamma International Sorority Inc

    EIN 680379031 · Headquarters: Sacramento, CA, US · Unknown & Unclassified · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  93. Sigma Phi Gamma International Sorority Inc

    EIN 946092622 · Headquarters: Oroville, CA, US · Unknown & Unclassified · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  94. Sigma Phi Gamma International Sorority Inc

    EIN 946104615 · Headquarters: Chico, CA, US · Unknown & Unclassified · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  95. Sigma Phi Gamma International Sorority Inc

    EIN 946108328 · Headquarters: San Jose, CA, US · Unknown & Unclassified · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  96. Sigma Phi Gamma International Sorority Inc

    EIN 946117556 · Headquarters: Roseville, CA, US · Unknown & Unclassified · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  97. Sigma Phi Gamma International Sorority Inc

    EIN 953669048 · Headquarters: Claremont, CA, US · Unknown & Unclassified · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  98. Sigma Phi Gamma International Sorority Inc

    EIN 953839391 · Headquarters: Oceanside, CA, US · Unknown & Unclassified · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  99. Sigma Phi Gamma International Sorority Inc

    EIN 956076543 · Headquarters: San DIego, CA, US · Unknown & Unclassified · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  100. Sigma Phi Gamma International Sorority Inc

    EIN 956131240 · Headquarters: Anaheim, CA, US · Unknown & Unclassified · Latest available filing year: 2009 · Primary form: IRS Form 990-N

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