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 237157504 · Headquarters: West St Paul, MN, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  2. Optimist International

    EIN 237160821 · Headquarters: Dubuque, IA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  3. Optimist International

    EIN 237164897 · Headquarters: West Bloomfield, MI, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  4. Optimist International

    EIN 237177827 · Headquarters: Grand Forks, ND, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  5. Optimist International

    EIN 237182306 · Headquarters: Lebanon, OR, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  6. Optimist International

    EIN 237249640 · Headquarters: TUCKER, GA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  7. Optimist International

    EIN 237258036 · Headquarters: Plainfield, IN, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  8. Optimist International

    EIN 237259014 · Headquarters: HILLSBORO, TX, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  9. Optimist International

    EIN 237259023 · Headquarters: Butler, NJ, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  10. Optimist International

    EIN 237273012 · Headquarters: Plattsmouth, NE, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  11. Optimist International

    EIN 237273022 · Headquarters: IOWA PARK, TX, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  12. Optimist International

    EIN 237281163 · Headquarters: Windsor, CO, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  13. Optimist International

    EIN 237289015 · Headquarters: Elizabethtown, PA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  14. Optimist International

    EIN 237289017 · Headquarters: Grand Rapids, MN, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  15. Optimist International

    EIN 237305565 · Headquarters: KEEGO HARBOR, MI, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  16. Optimist International

    EIN 237327051 · Headquarters: York, NE, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  17. Optimist International

    EIN 237327055 · Headquarters: Cape Canaveral, FL, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  18. Optimist International

    EIN 237383665 · Headquarters: Broken Bow, NE, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  19. Optimist International

    EIN 237396323 · Headquarters: SHENANDOAH, IA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  20. Optimist International

    EIN 237396543 · Headquarters: Burlington, IA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  21. Optimist International

    EIN 237396548 · Headquarters: Pasadena, MD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  22. Optimist International

    EIN 237396550 · Headquarters: Rogers City, MI, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  23. Optimist International

    EIN 237402393 · Headquarters: Toledo, OH, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  24. Optimist International

    EIN 237402400 · Headquarters: Charlotte, NC, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  25. Optimist International

    EIN 237424599 · Headquarters: Strongsville, OH, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  26. Optimist International

    EIN 237439229 · Headquarters: Greenbrier, AR, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  27. Optimist International

    EIN 237455503 · Headquarters: Piqua, OH, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  28. Optimist International

    EIN 237455505 · Headquarters: Saint Louis, MO, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  29. Optimist International

    EIN 237455514 · Headquarters: Wahpeton, ND, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  30. Optimist International

    EIN 237455518 · Headquarters: West Point, NE, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  31. Optimist International

    EIN 251303067 · Headquarters: Perkiomenville, PA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  32. Optimist International

    EIN 256063022 · Headquarters: MERCER, PA, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  33. Optimist International

    EIN 300083790 · Headquarters: Howell, MI, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  34. Optimist International

    EIN 300117196 · Headquarters: Springboro, OH, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  35. Optimist International

    EIN 300941315 · Headquarters: Bellbrook, OH, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  36. Optimist International

    EIN 311025894 · Headquarters: RUSHVILLE, IN, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  37. Optimist International

    EIN 311030206 · Headquarters: Zionsville, IN, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  38. Optimist International

    EIN 311047574 · Headquarters: Midddlebury, IN, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  39. Optimist International

    EIN 311068747 · Headquarters: Worthington, OH, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  40. Optimist International

    EIN 311094466 · Headquarters: Tipp City, OH, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  41. Optimist International

    EIN 311255115 · Headquarters: Centerville, OH, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  42. Optimist International

    EIN 311276263 · Headquarters: Kettering, OH, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  43. Optimist International

    EIN 311343939 · Headquarters: Dayton, OH, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  44. Optimist International

    EIN 316049344 · Headquarters: Pickerington, OH, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  45. Optimist International

    EIN 316050644 · Headquarters: DAYTON, OH, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  46. Optimist International

    EIN 316056312 · Headquarters: Brookville, OH, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  47. Optimist International

    EIN 316060850 · Headquarters: Englewood, OH, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  48. Optimist International

    EIN 316085053 · Headquarters: Centerville, OH, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  49. Optimist International

    EIN 316085054 · Headquarters: Eaton, OH, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  50. Optimist International

    EIN 320014563 · Headquarters: Brodhead, WI, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  51. Optimist International

    EIN 330185029 · Headquarters: South Gate, CA, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  52. Optimist International

    EIN 330224493 · Headquarters: IMPERI, CA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  53. Optimist International

    EIN 330395558 · Headquarters: SAN DIEGO, CA, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  54. Optimist International

    EIN 330628707 · Headquarters: santee, CA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  55. Optimist International

    EIN 341254670 · Headquarters: Lima, OH, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  56. Optimist International

    EIN 341468379 · Headquarters: Ridgeway, OH, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  57. Optimist International

    EIN 341479925 · Headquarters: Fairlawn, OH, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  58. Optimist International

    EIN 341658645 · Headquarters: McDonald, OH, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  59. Optimist International

    EIN 341700308 · Headquarters: Streetsboro, OH, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  60. Optimist International

    EIN 346555600 · Headquarters: MANSFIELD, OH, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  61. Optimist International

    EIN 346555681 · Headquarters: LIMA, OH, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  62. Optimist International

    EIN 346569680 · Headquarters: Conneaut, OH, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  63. Optimist International

    EIN 350919476 · Headquarters: Evansville, IN, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  64. Optimist International

    EIN 350950801 · Headquarters: Elkhart, IN, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  65. Optimist International

    EIN 351438767 · Headquarters: Rochester, IN, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  66. Optimist International

    EIN 351479642 · Headquarters: Indianapolis, IN, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  67. Optimist International

    EIN 351683408 · Headquarters: ELKHART, IN, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  68. Optimist International

    EIN 351683486 · Headquarters: Jasper, IN, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  69. Optimist International

    EIN 351750326 · Headquarters: Elkhart, IN, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  70. Optimist International

    EIN 356031134 · Headquarters: INDIANAPOLIS, IN, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  71. Optimist International

    EIN 356033836 · Headquarters: Clarksville, IN, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  72. Optimist International

    EIN 356041250 · Headquarters: MARKLEVILLE, IN, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  73. Optimist International

    EIN 356041582 · Headquarters: Lafayette, IN, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  74. Optimist International

    EIN 356041969 · Headquarters: Georgetown, IN, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  75. Optimist International

    EIN 356042577 · Headquarters: Fort Wayne, IN, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  76. Optimist International

    EIN 356043728 · Headquarters: New Castle, IN, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  77. Optimist International

    EIN 356044025 · Headquarters: Terre Haute, IN, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  78. Optimist International

    EIN 356044093 · Headquarters: Roanoke, IN, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  79. Optimist International

    EIN 356054359 · Headquarters: Evansville, IN, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  80. Optimist International

    EIN 356055426 · Headquarters: indianapolis, IN, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  81. Optimist International

    EIN 356055731 · Headquarters: Craigville, IN, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  82. Optimist International

    EIN 356058310 · Headquarters: Huntingburg, IN, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  83. Optimist International

    EIN 356067624 · Headquarters: Mount Summit, IN, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  84. Optimist International

    EIN 356067630 · Headquarters: Elkhart, IN, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  85. Optimist International

    EIN 356089558 · Headquarters: Huntington, IN, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  86. Optimist International

    EIN 362656463 · Headquarters: Princeton, IL, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  87. Optimist International

    EIN 363199926 · Headquarters: Sterling, IL, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  88. Optimist International

    EIN 363423147 · Headquarters: Niles, IL, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  89. Optimist International

    EIN 363989611 · Headquarters: santee, CA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  90. Optimist International

    EIN 364026280 · Headquarters: Tucson, AZ, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  91. Optimist International

    EIN 364029820 · Headquarters: Woodstock, GA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  92. Optimist International

    EIN 364088818 · Headquarters: Pensacola Beach, FL, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  93. Optimist International

    EIN 364109254 · Headquarters: Lincoln, NE, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  94. Optimist International

    EIN 364120145 · Headquarters: Grand Prairie, TX, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  95. Optimist International

    EIN 366089763 · Headquarters: East Moline, IL, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  96. Optimist International

    EIN 366132786 · Headquarters: Glenview, IL, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  97. Optimist International

    EIN 370038460 · Headquarters: NEW KENSINGTON, PA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  98. Optimist International

    EIN 370727711 · Headquarters: Columbia, IL, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  99. Optimist International

    EIN 371117569 · Headquarters: Delavan, IL, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  100. Optimist International

    EIN 371177843 · Headquarters: Chillicothe, IL, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

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