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. Optimist International

    EIN 900290084 · Headquarters: Gardner, KS, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  2. Optimist International

    EIN 900290188 · Headquarters: CHELTENHAM, PA, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  3. Optimist International

    EIN 900300562 · Headquarters: Roundup, MT, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  4. Optimist International

    EIN 900334440 · Headquarters: OCOTILLO, CA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  5. Optimist International

    EIN 900346537 · Headquarters: Cameron, MO, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  6. Optimist International

    EIN 900418506 · Headquarters: Perry, IA, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  7. Optimist International

    EIN 900429253 · Headquarters: Brandon, SD, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  8. Optimist International

    EIN 900505009 · Headquarters: Tucson, AZ, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  9. Optimist International

    EIN 900510126 · Headquarters: Wake Forest, NC, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  10. Optimist International

    EIN 900528724 · Headquarters: COTTAGE GROVE, WI, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  11. Optimist International

    EIN 900531336 · Headquarters: DAYTON, OH, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  12. Optimist International

    EIN 900577248 · Headquarters: Muskego, WI, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  13. Optimist International

    EIN 900593825 · Headquarters: Smithfield, VA, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  14. Optimist International

    EIN 900595943 · Headquarters: Logan, IA, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  15. Optimist International

    EIN 900606281 · Headquarters: Festus, MO, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  16. Optimist International

    EIN 900606613 · Headquarters: Middleton, ID, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  17. Optimist International

    EIN 900622057 · Headquarters: Omaha, NE, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  18. Optimist International

    EIN 900642752 · Headquarters: El Dorado Springs, MO, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  19. Optimist International

    EIN 900661574 · Headquarters: DICKINSON, TX, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  20. Optimist International

    EIN 900736765 · Headquarters: Terre Haute, IN, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  21. Optimist International

    EIN 900736766 · Headquarters: Mount Clemens, MI, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  22. Optimist International

    EIN 900755914 · Headquarters: Oakland, IA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  23. Optimist International

    EIN 900762203 · Headquarters: Olmstead, KY, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  24. Optimist International

    EIN 900765323 · Headquarters: Carrollton, GA, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  25. Optimist International

    EIN 900765324 · Headquarters: Rock Hill, SC, US · Unknown & Unclassified · Latest available filing year: 2015 · Primary form: IRS Form 990-N

  26. Optimist International

    EIN 900767147 · Headquarters: Rolesville, NC, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  27. Optimist International

    EIN 900788337 · Headquarters: Benson, NC, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  28. Optimist International

    EIN 900819281 · Headquarters: EAST RIDGE, TN, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  29. Optimist International

    EIN 900881505 · Headquarters: Prescott, AZ, US · Unknown & Unclassified · Latest available filing year: 2016 · Primary form: IRS Form 990-N

  30. Optimist International

    EIN 900885495 · Headquarters: LeClaire, IA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  31. Optimist International

    EIN 900897481 · Headquarters: STURGIS, SD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  32. Optimist International

    EIN 900954733 · Headquarters: Evans, LA, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  33. Optimist International

    EIN 901015784 · Headquarters: Lockwood, MO, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  34. Optimist International

    EIN 901019144 · Headquarters: Charlotte, NC, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  35. Optimist International

    EIN 901021720 · Headquarters: Dale, IN, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  36. Optimist International

    EIN 901032772 · Headquarters: Beavercreek, OH, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  37. Optimist International

    EIN 911830447 · Headquarters: Selma, AL, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  38. Optimist International

    EIN 911830637 · Headquarters: Talladega, AL, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  39. Optimist International

    EIN 911866106 · Headquarters: Sumter, SC, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  40. Optimist International

    EIN 911889288 · Headquarters: Arena, WI, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  41. Optimist International

    EIN 911899929 · Headquarters: Madison, NY, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  42. Optimist International

    EIN 911901372 · Headquarters: PONTIAC, MI, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  43. Optimist International

    EIN 911922329 · Headquarters: Dunkirk, IN, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  44. Optimist International

    EIN 911927631 · Headquarters: Coldwater, MS, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  45. Optimist International

    EIN 911985266 · Headquarters: Warren, MI, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  46. Optimist International

    EIN 912002305 · Headquarters: waterville, NY, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  47. Optimist International

    EIN 912059523 · Headquarters: HERNANDO, MS, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  48. Optimist International

    EIN 912065415 · Headquarters: Cumming, GA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  49. Optimist International

    EIN 912073621 · Headquarters: Atascadero, CA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  50. Optimist International

    EIN 912082316 · Headquarters: Granite Falls, NC, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  51. Optimist International

    EIN 916057526 · Headquarters: VANCOUVER, WA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  52. Optimist International

    EIN 920242934 · Headquarters: Jonesboro, AR, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  53. Optimist International

    EIN 920722261 · Headquarters: Wilson, NC, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  54. Optimist International

    EIN 921418082 · Headquarters: WALDOR, MD, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  55. Optimist International

    EIN 921563022 · Headquarters: Lubbock, TX, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  56. Optimist International

    EIN 923913441 · Headquarters: Oxford, MI, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  57. Optimist International

    EIN 930566934 · Headquarters: TROUTDALE, OR, US · Unknown & Unclassified · Latest available filing year: 2017 · Primary form: IRS Form 990-N

  58. Optimist International

    EIN 930569848 · Headquarters: Portland, OR, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  59. Optimist International

    EIN 930576775 · Headquarters: ALBANY, OR, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  60. Optimist International

    EIN 930819912 · Headquarters: beaver dam, WI, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  61. Optimist International

    EIN 930819913 · Headquarters: Kewaunee, WI, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  62. Optimist International

    EIN 930819922 · Headquarters: Chilton, WI, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  63. Optimist International

    EIN 931544322 · Headquarters: Waterford, WI, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  64. Optimist International

    EIN 933099511 · Headquarters: Stillwater, MN, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  65. Optimist International

    EIN 933487547 · Headquarters: Rome, GA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  66. Optimist International

    EIN 933583986 · Headquarters: Springfield, OH, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  67. Optimist International

    EIN 936027090 · Headquarters: OREGON CITY, OR, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  68. Optimist International

    EIN 936032693 · Headquarters: Salem, OR, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  69. Optimist International

    EIN 941647916 · Headquarters: sacramento, CA, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  70. Optimist International

    EIN 942567622 · Headquarters: San Jose, CA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  71. Optimist International

    EIN 946081007 · Headquarters: Redwood City, CA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  72. Optimist International

    EIN 946102916 · Headquarters: San Carlos, CA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  73. Optimist International

    EIN 946107714 · Headquarters: SAN JOSE, CA, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  74. Optimist International

    EIN 946121480 · Headquarters: SACRAMENTO, CA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  75. Optimist International

    EIN 952078252 · Headquarters: RIVERSIDE, CA, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  76. Optimist International

    EIN 952545568 · Headquarters: SAN DIEGO, CA, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  77. Optimist International

    EIN 953102597 · Headquarters: Bonita, CA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  78. Optimist International

    EIN 953432408 · Headquarters: CERRITOS, CA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  79. Optimist International

    EIN 953621782 · Headquarters: Solana Beach, CA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  80. Optimist International

    EIN 953782113 · Headquarters: WEST HILLS, CA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  81. Optimist International

    EIN 954119564 · Headquarters: CANYON COUNTRY, CA, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  82. Optimist International

    EIN 954255516 · Headquarters: Moorpark, CA, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  83. Optimist International

    EIN 954479539 · Headquarters: RESEDA, CA, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  84. Optimist International

    EIN 956093617 · Headquarters: Van Nuys, CA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  85. Optimist International

    EIN 956096551 · Headquarters: Santa Paula, CA, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  86. Optimist International

    EIN 956123734 · Headquarters: St Louis, MO, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  87. Optimist International

    EIN 956130891 · Headquarters: Gardena, CA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  88. Optimist International

    EIN 956130961 · Headquarters: Carlsbad, CA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  89. Optimist International

    EIN 956143965 · Headquarters: OJAI, CA, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  90. Optimist International

    EIN 956146196 · Headquarters: Malibu, CA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  91. Optimist International

    EIN 956209608 · Headquarters: SAN DIEGO, CA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  92. Optimist International

    EIN 956210804 · Headquarters: APPLE VALLEY, CA, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  93. Optimist International

    EIN 956220882 · Headquarters: PACIFIC PALISADES, CA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  94. Optimist International #30541

    EIN 300119281 · Headquarters: COLUMBIA, MO, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  95. Optimist International - 10050 Kearney NE

    EIN 476038675 · Headquarters: Kearney, NE, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  96. Optimist International - Jackson

    EIN 436051525 · Headquarters: JACKSON, MO, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  97. Optimist International 04085Bft

    EIN 351949875 · Headquarters: NEW CASTLE, IN, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  98. Optimist International 04260 Oc of Hammond In

    EIN 356028350 · Headquarters: HAMMOND, IN, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  99. Optimist International 04430 Portland Evening In

    EIN 351927728 · Headquarters: PORTLAND, IN, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  100. Optimist International 04444 Opti Club of Portland In

    EIN 237424601 · Headquarters: PORTLAND, IN, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

First page and all pages