Unknown & Unclassified nonprofits in Iowa

Unknown & Unclassified nonprofits in Iowa. Browse 15,415 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. Onslow Area Housing Corporation

    EIN 237416398 · Headquarters: Mechanicsville, IA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  2. Open Hearts Open Fields Rescue

    EIN 992214984 · Headquarters: West Des Moines, IA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  3. Opening Doors

    EIN 421490364 · Headquarters: DUBUQUE, IA, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990

  4. Opera House Inc

    EIN 237043885 · Headquarters: What Cheer, IA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  5. Operating Engineers Local #234 Health and Welfare Trust Fund

    EIN 510141783 · Headquarters: DES MOINES, IA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  6. Operation Threshold Inc

    EIN 420982549 · Headquarters: WATERLOO, IA, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990

  7. Operative Plasterers & Cement Masons International Association Local 538

    EIN 470199095 · Headquarters: DES MOINES, IA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  8. Opportunities Mentoring of Van Buren County

    EIN 262093118 · Headquarters: Keosauqua, IA, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  9. Opportunities Unlimited

    EIN 421354428 · Headquarters: SIOUX CITY, IA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  10. Opportunity Living Benefit Tr

    EIN 421448684 · Headquarters: Lake City, IA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  11. Optimist International

    EIN 200990687 · Headquarters: Grinnell, IA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  12. Optimist International

    EIN 237024431 · Headquarters: Cedar Rapids, IA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  13. Optimist International

    EIN 237152531 · Headquarters: Washington, IA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  14. Optimist International

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

  15. Optimist International

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

  16. Optimist International

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

  17. Optimist International

    EIN 391875044 · Headquarters: West Point, IA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  18. Optimist International

    EIN 421150940 · Headquarters: ANKENY, IA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  19. Optimist International

    EIN 421181259 · Headquarters: Elk Horn, IA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  20. Optimist International

    EIN 421228864 · Headquarters: Winterset, IA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  21. Optimist International

    EIN 421238325 · Headquarters: WALNUT, IA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  22. Optimist International

    EIN 421242091 · Headquarters: Griswold, IA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  23. Optimist International

    EIN 421248818 · Headquarters: LE MARS, IA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  24. Optimist International

    EIN 421322113 · Headquarters: CORYDON, IA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  25. Optimist International

    EIN 421337269 · Headquarters: WEST DES MOINES, IA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  26. Optimist International

    EIN 421411246 · Headquarters: Bloomfield, IA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  27. Optimist International

    EIN 421411251 · Headquarters: OSKALOOSA, IA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  28. Optimist International

    EIN 421421033 · Headquarters: Woodbine, IA, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  29. Optimist International

    EIN 421475865 · Headquarters: Urbandale, IA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  30. Optimist International

    EIN 426061137 · Headquarters: WATERLOO, IA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  31. Optimist International

    EIN 426075502 · Headquarters: Red Oak, IA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  32. Optimist International

    EIN 426076609 · Headquarters: MARSHALLTOWN, IA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  33. Optimist International

    EIN 426077224 · Headquarters: WEST DES MOINES, IA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  34. Optimist International

    EIN 426081195 · Headquarters: Iowa City, IA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  35. Optimist International

    EIN 426085309 · Headquarters: Maquoketa, IA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  36. Optimist International

    EIN 426095480 · Headquarters: Solon, IA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  37. Optimist International

    EIN 426130959 · Headquarters: Kalona, IA, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  38. Optimist International

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

  39. Optimist International

    EIN 510200120 · Headquarters: KALONA, IA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  40. Optimist International

    EIN 510219238 · Headquarters: TABOR, IA, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  41. Optimist International

    EIN 812963736 · Headquarters: Bettendorf, IA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  42. Optimist International

    EIN 813275703 · Headquarters: SIOUX CITY, IA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  43. Optimist International

    EIN 822685390 · Headquarters: Boone, IA, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  44. Optimist International

    EIN 842261133 · Headquarters: AMES, IA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  45. Optimist International

    EIN 844850328 · Headquarters: Council Bluffs, IA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  46. Optimist International

    EIN 900281414 · Headquarters: Lamoni, IA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  47. Optimist International

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

  48. Optimist International

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

  49. Optimist International

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

  50. Optimist International

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

  51. OPTIMIST INTERNATIONAL 40038 QC of Davenport-Quad Cities-Morning

    EIN 421276656 · Headquarters: DAVENPORT, IA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  52. OPTIMIST INTERNATIONAL DBA Optimist Club of North Liberty

    EIN 237273007 · Headquarters: North Liberty, IA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  53. Optimist International Dubuque IA

    EIN 426091411 · Headquarters: Dubuque, IA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  54. Optimists Club of Cedar Rapids Inc

    EIN 426078628 · Headquarters: CEDAR RAPIDS, IA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  55. Optometric Foundation Inc

    EIN 510168385 · Headquarters: West Des Moines, IA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  56. Orange City Arts Council

    EIN 421287752 · Headquarters: ORANGE CITY, IA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  57. Orange City Christian School

    EIN 420776438 · Headquarters: Orange City, IA, United States · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  58. Orange City Community Chest Inc

    EIN 426088398 · Headquarters: Orange City, IA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  59. Orange City Municipal Golf Assoc

    EIN 421425805 · Headquarters: ORANGE CITY, IA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  60. Orange Pride Boosters Inc

    EIN 842856734 · Headquarters: Marengo, IA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  61. Order of the Amaranth Inc

    EIN 237614563 · Headquarters: Ottumwa, IA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  62. Order of the Amaranth Inc

    EIN 421300890 · Headquarters: Ottumwa, IA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  63. Order of the Amaranth Inc Supreme Council

    EIN 237455874 · Headquarters: Ottumwa, IA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  64. Order of the Amaranth Inc Supreme Council

    EIN 237614286 · Headquarters: Ottumwa, IA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  65. Order of the Easter Star of Iowa

    EIN 237548205 · Headquarters: Knoxville, IA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  66. Order of the Eastern Star

    EIN 237548477 · Headquarters: Knoxville, IA, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  67. Order of the Eastern Star of Illinois

    EIN 237185951 · Headquarters: Clinton, IA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  68. Order of the Eastern Star of Illinois

    EIN 371023129 · Headquarters: Fort Madison, IA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  69. Order of the Eastern Star of Iowa

    EIN 237040741 · Headquarters: Knoxville, IA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  70. Order of the Eastern Star of Iowa

    EIN 237134463 · Headquarters: Knoxville, IA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  71. Order of the Eastern Star of Iowa

    EIN 237248120 · Headquarters: Knoxville, IA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  72. Order of the Eastern Star of Iowa

    EIN 237344700 · Headquarters: Knoxville, IA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  73. Order of the Eastern Star of Iowa

    EIN 237548213 · Headquarters: Knoxville, IA, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  74. Order of the Eastern Star of Iowa

    EIN 237548215 · Headquarters: Knoxville, IA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  75. Order of the Eastern Star of Iowa

    EIN 237548218 · Headquarters: Knoxville, IA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  76. Order of the Eastern Star of Iowa

    EIN 237548219 · Headquarters: Knoxville, IA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  77. Order of the Eastern Star of Iowa

    EIN 237548240 · Headquarters: Knoxville, IA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  78. Order of the Eastern Star of Iowa

    EIN 237548246 · Headquarters: Knoxville, IA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  79. Order of the Eastern Star of Iowa

    EIN 237548254 · Headquarters: Knoxville, IA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  80. Order of the Eastern Star of Iowa

    EIN 237548270 · Headquarters: Knoxville, IA, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  81. Order of the Eastern Star of Iowa

    EIN 237548293 · Headquarters: Knoxville, IA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  82. Order of the Eastern Star of Iowa

    EIN 237548304 · Headquarters: Knoxville, IA, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  83. Order of the Eastern Star of Iowa

    EIN 237548306 · Headquarters: Knoxville, IA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  84. Order of the Eastern Star of Iowa

    EIN 237548325 · Headquarters: Knoxville, IA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  85. Order of the Eastern Star of Iowa

    EIN 237548333 · Headquarters: Knoxville, IA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  86. Order of the Eastern Star of Iowa

    EIN 237548347 · Headquarters: Knoxville, IA, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  87. Order of the Eastern Star of Iowa

    EIN 237548350 · Headquarters: Knoxville, IA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  88. Order of the Eastern Star of Iowa

    EIN 237548365 · Headquarters: Knoxville, IA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  89. Order of the Eastern Star of Iowa

    EIN 237548381 · Headquarters: Knoxville, IA, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  90. Order of the Eastern Star of Iowa

    EIN 237548393 · Headquarters: Knoxville, IA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  91. Order of the Eastern Star of Iowa

    EIN 237548401 · Headquarters: Knoxville, IA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  92. Order of the Eastern Star of Iowa

    EIN 237548404 · Headquarters: Knoxville, IA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  93. Order of the Eastern Star of Iowa

    EIN 237548416 · Headquarters: Knoxville, IA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  94. Order of the Eastern Star of Iowa

    EIN 237548417 · Headquarters: Knoxville, IA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  95. Order of the Eastern Star of Iowa

    EIN 237548424 · Headquarters: Knoxville, IA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  96. Order of the Eastern Star of Iowa

    EIN 237548426 · Headquarters: Knoxville, IA, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  97. Order of the Eastern Star of Iowa

    EIN 237548428 · Headquarters: Knoxville, IA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  98. Order of the Eastern Star of Iowa

    EIN 237548452 · Headquarters: Knoxville, IA, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  99. Order of the Eastern Star of Iowa

    EIN 237548496 · Headquarters: Knoxville, IA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  100. Order of the Eastern Star of Iowa

    EIN 237548510 · Headquarters: Knoxville, IA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

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