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 431341830 · Headquarters: Brentwood, MO, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  2. Optimist International

    EIN 431366594 · Headquarters: Belton, MO, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  3. Optimist International

    EIN 431398687 · Headquarters: Rock Port, MO, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  4. Optimist International

    EIN 431410873 · Headquarters: Blue Springs, MO, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  5. Optimist International

    EIN 431477121 · Headquarters: JEFFERSON, WI, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  6. Optimist International

    EIN 431549411 · Headquarters: Clinton, MO, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  7. Optimist International

    EIN 431563125 · Headquarters: Strafford, MO, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  8. Optimist International

    EIN 431678888 · Headquarters: Kansas City, MO, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  9. Optimist International

    EIN 431753955 · Headquarters: MARSHALL, MO, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  10. Optimist International

    EIN 431793101 · Headquarters: LEES SUMMIT, MO, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  11. Optimist International

    EIN 436038637 · Headquarters: Clinton, MO, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  12. Optimist International

    EIN 436039524 · Headquarters: MOBERLY, MO, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  13. Optimist International

    EIN 436048872 · Headquarters: St Louis, MO, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  14. Optimist International

    EIN 436049800 · Headquarters: MARSHFIELD, MO, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  15. Optimist International

    EIN 436052958 · Headquarters: Lebanon, MO, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  16. Optimist International

    EIN 436058908 · Headquarters: Rolla, MO, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  17. Optimist International

    EIN 436062766 · Headquarters: Fulton, MO, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  18. Optimist International

    EIN 436062769 · Headquarters: Excelsior Springs, MO, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  19. Optimist International

    EIN 436062775 · Headquarters: MARSHALL, MO, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  20. Optimist International

    EIN 436062794 · Headquarters: Warrensburg, MO, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  21. Optimist International

    EIN 436079114 · Headquarters: Maryville, MO, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  22. Optimist International

    EIN 436098738 · Headquarters: Kirksville, MO, US · Unknown & Unclassified · Latest available filing year: 2017 · Primary form: IRS Form 990-N

  23. Optimist International

    EIN 450353296 · Headquarters: Valley City, ND, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  24. Optimist International

    EIN 450418852 · Headquarters: Bismarck, ND, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  25. Optimist International

    EIN 456017108 · Headquarters: Fargo, ND, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  26. Optimist International

    EIN 460372422 · Headquarters: Aberdeen, SD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  27. Optimist International

    EIN 460391442 · Headquarters: Spearfish, SD, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  28. Optimist International

    EIN 460517111 · Headquarters: TUCSON, AZ, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  29. Optimist International

    EIN 465411270 · Headquarters: Waddy, KY, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  30. Optimist International

    EIN 465694572 · Headquarters: Ambler, PA, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  31. Optimist International

    EIN 465764495 · Headquarters: Garrison, ND, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  32. Optimist International

    EIN 466012973 · Headquarters: Sioux Falls, SD, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  33. Optimist International

    EIN 466014955 · Headquarters: RAPID CITY, SD, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  34. Optimist International

    EIN 466116758 · Headquarters: Kansas City, KS, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  35. Optimist International

    EIN 470260415 · Headquarters: Omaha, NE, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  36. Optimist International

    EIN 470522276 · Headquarters: Ogallala, NE, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  37. Optimist International

    EIN 470668862 · Headquarters: Paxton, NE, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  38. Optimist International

    EIN 470675667 · Headquarters: South Sioux City, NE, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  39. Optimist International

    EIN 470675668 · Headquarters: North Bend, NE, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  40. Optimist International

    EIN 470696348 · Headquarters: Omaha, NE, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  41. Optimist International

    EIN 470700629 · Headquarters: Auburn, NE, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  42. Optimist International

    EIN 472018123 · Headquarters: Holland, MI, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  43. Optimist International

    EIN 472049902 · Headquarters: Nebraska City, NE, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  44. Optimist International

    EIN 472066659 · Headquarters: TUCKER, GA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  45. Optimist International

    EIN 472084621 · Headquarters: Chester, MD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  46. Optimist International

    EIN 472296122 · Headquarters: Marina Del Rey, CA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  47. Optimist International

    EIN 472769176 · Headquarters: Wilson, NC, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  48. Optimist International

    EIN 473313491 · Headquarters: Sunland Park, NM, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  49. Optimist International

    EIN 473424677 · Headquarters: DE SOTO, KS, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  50. Optimist International

    EIN 473716540 · Headquarters: Tallahassee, FL, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  51. Optimist International

    EIN 473967095 · Headquarters: Saint Louis, MO, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  52. Optimist International

    EIN 474057280 · Headquarters: Detroit, MI, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  53. Optimist International

    EIN 474775833 · Headquarters: DOUGLASVILLE, GA, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  54. Optimist International

    EIN 474856582 · Headquarters: Alger, MI, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  55. Optimist International

    EIN 474978399 · Headquarters: CHARLOTTE, NC, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  56. Optimist International

    EIN 475093179 · Headquarters: Mankato, MN, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  57. Optimist International

    EIN 475183574 · Headquarters: Middlothian, VA, US · Unknown & Unclassified · Latest available filing year: 2016 · Primary form: IRS Form 990-N

  58. Optimist International

    EIN 475235509 · Headquarters: Ridgely, MD, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  59. Optimist International

    EIN 475272487 · Headquarters: Gresham, OR, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  60. Optimist International

    EIN 475314492 · Headquarters: Stafford, TX, US · Unknown & Unclassified · Latest available filing year: 2015 · Primary form: IRS Form 990-N

  61. Optimist International

    EIN 475474871 · Headquarters: Rochester, NY, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  62. Optimist International

    EIN 475511540 · Headquarters: Flushing, MI, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  63. Optimist International

    EIN 475534009 · Headquarters: CHULA VISTA, CA, US · Unknown & Unclassified · Latest available filing year: 2017 · Primary form: IRS Form 990-N

  64. Optimist International

    EIN 475549557 · Headquarters: San Diego, CA, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  65. Optimist International

    EIN 475608146 · Headquarters: Little Rock, AR, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  66. Optimist International

    EIN 475644375 · Headquarters: Wilmington, DE, US · Unknown & Unclassified · Latest available filing year: 2017 · Primary form: IRS Form 990-N

  67. Optimist International

    EIN 476027530 · Headquarters: OMAHA, NE, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  68. Optimist International

    EIN 476029133 · Headquarters: LINCOLN, NE, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  69. Optimist International

    EIN 476033382 · Headquarters: Columbus, NE, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  70. Optimist International

    EIN 476033474 · Headquarters: Fairbury, NE, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  71. Optimist International

    EIN 476033717 · Headquarters: Fremont, NE, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  72. Optimist International

    EIN 476037242 · Headquarters: BEATRICE, NE, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  73. Optimist International

    EIN 476038265 · Headquarters: Lincoln, NE, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  74. Optimist International

    EIN 476038673 · Headquarters: Lincoln, NE, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  75. Optimist International

    EIN 480686750 · Headquarters: Lawrence, KS, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  76. Optimist International

    EIN 480689069 · Headquarters: Salina, KS, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  77. Optimist International

    EIN 480922103 · Headquarters: Great Bend, KS, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  78. Optimist International

    EIN 481052320 · Headquarters: Lenexa, KS, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  79. Optimist International

    EIN 486106907 · Headquarters: Topeka, KS, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  80. Optimist International

    EIN 486110725 · Headquarters: GREAT BEND, KS, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  81. Optimist International

    EIN 486116748 · Headquarters: Maize, KS, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  82. Optimist International

    EIN 486116750 · Headquarters: Topeka, KS, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  83. Optimist International

    EIN 486117128 · Headquarters: SHAWNEE, KS, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  84. Optimist International

    EIN 486118201 · Headquarters: Pratt, KS, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  85. Optimist International

    EIN 486118260 · Headquarters: Independence, KS, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  86. Optimist International

    EIN 486122451 · Headquarters: Lawrence, KS, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  87. Optimist International

    EIN 486122467 · Headquarters: Prairie Village, KS, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  88. Optimist International

    EIN 486122727 · Headquarters: WICHITA, KS, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  89. Optimist International

    EIN 486127225 · Headquarters: Hays, KS, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  90. Optimist International

    EIN 486140309 · Headquarters: Arkansas City, KS, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  91. Optimist International

    EIN 486141140 · Headquarters: Wichita, KS, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  92. Optimist International

    EIN 510148382 · Headquarters: McCook, NE, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  93. Optimist International

    EIN 510157522 · Headquarters: Carter Lake, IA, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  94. Optimist International

    EIN 510173549 · Headquarters: Utica, NY, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  95. Optimist International

    EIN 510173799 · Headquarters: Montebello, CA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  96. Optimist International

    EIN 510184403 · Headquarters: Sioux Falls, SD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  97. Optimist International

    EIN 510184423 · Headquarters: Mason, OH, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  98. Optimist International

    EIN 510184478 · Headquarters: LEICESTER, NC, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  99. Optimist International

    EIN 510184498 · Headquarters: Ostrander, OH, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  100. Optimist International

    EIN 510192303 · Headquarters: Green Bay, WI, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

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