Nonprofits in South Dakota

Nonprofits in South Dakota. Browse 9,038 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. Omega Alumni of Theta Tau V20

    EIN 883248782 · Headquarters: RAPID CITY, SD, USA · Recreation & Sports · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  2. Omega Chapter of Alpha Omega Epsilon

    EIN 800547961 · Headquarters: Brookings, SD, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  3. Omega Chapter of Theta Tau Fraternity

    EIN 237169138 · Headquarters: RAPID CITY, SD, USA · Education · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  4. Omicron Delta Epsilon International Honor Society in Economics Inc

    EIN 742592831 · Headquarters: Vermillion, SD, US · Education · Latest available filing year: 2008 · Primary form: IRS Form 990-N

  5. Omicron Delta Epsilon International Honor Society in Economics Inc

    EIN 742605537 · Headquarters: Sioux Falls, SD, US · Education · Latest available filing year: 2008 · Primary form: IRS Form 990-N

  6. Ominichinyapi Tiospaye Icjeya Oyate Inc

    EIN 460413218 · Headquarters: ROSEBUD, SD, US · Arts, Culture & Humanities · Latest available filing year: 2013 · Primary form: IRS Form 990-N

  7. On Hand Development Corporation

    EIN 460412222 · Headquarters: MILLER, SD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  8. Onaka Community Club Inc

    EIN 412133186 · Headquarters: Onaka, SD, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  9. One Greatful America Inc

    EIN 844996492 · Headquarters: RAPID CITY, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  10. One Spirit

    EIN 263592983 · Headquarters: RAPID CITY, SD, USA · Human Services · Latest available filing year: 2024 · Primary form: IRS Form 990

  11. One Touch Communities

    EIN 815235040 · Headquarters: Sioux Falls, SD, US · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  12. One Voice Community Choir

    EIN 841838448 · Headquarters: Sioux Falls, SD, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  13. Oneheart

    EIN 834200317 · Headquarters: RAPID CITY, SD, USA · Housing & Shelter · Latest available filing year: 2024 · Primary form: IRS Form 990

  14. Onida Area Development Corporation

    EIN 460424783 · Headquarters: Onida, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  15. Onward Learning

    EIN 872678295 · Headquarters: Martin, SD, USA · Education · Latest available filing year: 2025 · Primary form: IRS Form 990

  16. Onward Wolsey

    EIN 460436780 · Headquarters: wolsey, SD, US · Community Improvement & Capacity Building · Latest available filing year: 2012 · Primary form: IRS Form 990-N

  17. Onward Yankton Inc

    EIN 811150244 · Headquarters: YANKTON, SD, US · Human Services · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  18. Oo Foundation

    EIN 933471552 · Headquarters: SPEARFISH, SD, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  19. Opdahl Farm Mutual Insurance Co

    EIN 460173784 · Headquarters: CASTLEWOOD, SD, USA · Mutual & Membership Benefit · Latest available filing year: 2010 · Primary form: IRS Form 990

  20. Open

    EIN 464659090 · Headquarters: RAPID CITY, SD, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  21. Open Range Biblical Outiftters Inc

    EIN 453661490 · Headquarters: Rapid City, SD, US · Religion Related · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  22. Operation Black Hills Cabin

    EIN 275144524 · Headquarters: CUSTER, SD, USA · Human Services · Latest available filing year: 2024 · Primary form: IRS Form 990

  23. Operation Butterfly

    EIN 923493935 · Headquarters: Harrold, SD, US · Environment · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  24. Operation Combating Veteran Suicide

    EIN 332473924 · Headquarters: Box Elder, SD, US · Public & Societal Benefit · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  25. Operation Lunchbox Inc

    EIN 931361438 · Headquarters: WATERTOWN, SD, US · Human Services · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  26. Operation Meaningful Life Inc

    EIN 813710526 · Headquarters: Sioux Falls, SD, US · Human Services · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  27. Operation Muskie

    EIN 800673079 · Headquarters: Webster, SD, USA · Recreation & Sports · Latest available filing year: 2016 · Primary form: IRS Form 990

  28. Operation Opening Doors of South Dakota Inc

    EIN 455523190 · Headquarters: Sioux Falls, SD, US · Housing & Shelter · Latest available filing year: 2017 · Primary form: IRS Form 990-N

  29. Operation Pets Inc

    EIN 454436557 · Headquarters: Rapid City, SD, US · Animal Related · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  30. Operation Veterans Enrichment Town of Hot Springs South Dakota Inc

    EIN 861647623 · Headquarters: Hot Springs, SD, US · Community Improvement & Capacity Building · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  31. Operation Warmheart

    EIN 460434376 · Headquarters: Ellsworth AFB, SD, US · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  32. Opie R & Helen a Benson Community Improvement Foundation

    EIN 204913059 · Headquarters: PARKSTON, SD, USA · Human Services · Latest available filing year: 2025 · Primary form: IRS Form 990

  33. Opportunities Farm

    EIN 820564374 · Headquarters: BROOKINGS, SD, USA · Education · Latest available filing year: 2015 · Primary form: IRS Form 990

  34. Opportunities for Independent Living

    EIN 460431904 · Headquarters: Aberdeen, SD, USA · Human Services · Latest available filing year: 2010 · Primary form: IRS Form 990

  35. Opticians Association of South Dakota

    EIN 812435335 · Headquarters: Hermosa, SD, US · Community Improvement & Capacity Building · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  36. Optimist International

    EIN 416053928 · Headquarters: Sioux Falls, SD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  37. Optimist International

    EIN 460358808 · Headquarters: CROOKS, SD, US · Education · Latest available filing year: 2008 · Primary form: IRS Form 990-N

  38. Optimist International

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

  39. Optimist International

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

  40. Optimist International

    EIN 460448513 · Headquarters: Rapid City, SD, US · Education · Latest available filing year: 2016 · Primary form: IRS Form 990-N

  41. Optimist International

    EIN 460460608 · Headquarters: Yankton, SD, US · Youth Development · Latest available filing year: 2010 · Primary form: IRS Form 990-N

  42. Optimist International

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

  43. Optimist International

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

  44. Optimist International

    EIN 466018628 · Headquarters: Huron, SD, US · Education · Latest available filing year: 2008 · Primary form: IRS Form 990-N

  45. Optimist International

    EIN 466024835 · Headquarters: Rapid City, SD, US · Community Improvement & Capacity Building · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  46. Optimist International

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

  47. Optimist International

    EIN 813336576 · Headquarters: VERMILLION, SD, US · Unknown & Unclassified · Latest available filing year: 2018 · Primary form: IRS Form 990-N

  48. Optimist International

    EIN 821801708 · Headquarters: Harrisburg, SD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  49. Optimist International

    EIN 900143669 · Headquarters: Pierre, SD, US · Education · Latest available filing year: 2008 · Primary form: IRS Form 990-N

  50. Optimist International

    EIN 900239090 · Headquarters: MITCHELL, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  51. Optimist International

    EIN 900290814 · Headquarters: Deadwood, SD, US · Education · Latest available filing year: 2015 · Primary form: IRS Form 990-N

  52. Optimist International

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

  53. Optimist International

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

  54. Optimist International Brookings

    EIN 237178276 · Headquarters: BROOKINGS, SD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  55. OPTIMIST INTERNATIONAL Watertown Optimist Club

    EIN 510184402 · Headquarters: Watertown, SD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  56. Opus Prize Foundation C/O Adler Trust Company

    EIN 460434399 · Headquarters: Sious Falls, SD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  57. Orange Crushers

    EIN 465640098 · Headquarters: CANISTOTA, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  58. Order of Eastern Star of South Dakota

    EIN 466014376 · Headquarters: Mitchell, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  59. Order of Eastern Star of South Dakt Oa

    EIN 237172455 · Headquarters: Presho, SD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  60. Order of the Eastern Star of South Dakota

    EIN 237170651 · Headquarters: Buffalo, SD, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  61. Order of the Eastern Star of South Dakota

    EIN 237170701 · Headquarters: SHADEHILL, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  62. Order of the Eastern Star of South Dakota

    EIN 237170713 · Headquarters: BURKE, SD, US · Mutual & Membership Benefit · Latest available filing year: 2010 · Primary form: IRS Form 990-N

  63. Order of the Eastern Star of South Dakota

    EIN 237170714 · Headquarters: WINNER, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  64. Order of the Eastern Star of South Dakota

    EIN 237170725 · Headquarters: PHILIP, SD, US · Mutual & Membership Benefit · Latest available filing year: 2008 · Primary form: IRS Form 990-N

  65. Order of the Eastern Star of South Dakota

    EIN 237170726 · Headquarters: Lead, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  66. Order of the Eastern Star of South Dakota

    EIN 237170727 · Headquarters: Kadoka, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  67. Order of the Eastern Star of South Dakota

    EIN 237172433 · Headquarters: clark, SD, US · Mutual & Membership Benefit · Latest available filing year: 2013 · Primary form: IRS Form 990-N

  68. Order of the Eastern Star of South Dakota

    EIN 237172435 · Headquarters: De Smet, SD, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  69. Order of the Eastern Star of South Dakota

    EIN 237172439 · Headquarters: Tulare, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  70. Order of the Eastern Star of South Dakota

    EIN 237172444 · Headquarters: Hermosa, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  71. Order of the Eastern Star of South Dakota

    EIN 237172447 · Headquarters: Onida, SD, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  72. Order of the Eastern Star of South Dakota

    EIN 237172451 · Headquarters: Ree Heights, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  73. Order of the Eastern Star of South Dakota

    EIN 237172453 · Headquarters: Colton, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  74. Order of the Eastern Star of South Dakota

    EIN 237172458 · Headquarters: Onida, SD, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  75. Order of the Eastern Star of South Dakota

    EIN 237172461 · Headquarters: BLUNT, SD, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  76. Order of the Eastern Star of South Dakota

    EIN 237172462 · Headquarters: Hurley, SD, US · Science & Technology · Latest available filing year: 2008 · Primary form: IRS Form 990-N

  77. Order of the Eastern Star of South Dakota

    EIN 237172464 · Headquarters: Bath, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  78. Order of the Eastern Star of South Dakota

    EIN 237172466 · Headquarters: Wessington Springs, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  79. Order of the Eastern Star of South Dakota

    EIN 237172470 · Headquarters: Sioux Falls, SD, US · Science & Technology · Latest available filing year: 2014 · Primary form: IRS Form 990-N

  80. Order of the Eastern Star of South Dakota

    EIN 237172477 · Headquarters: CHAMBERLAIN, SD, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  81. Order of the Eastern Star of South Dakota

    EIN 237172478 · Headquarters: Armour, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  82. Order of the Eastern Star of South Dakota

    EIN 237172479 · Headquarters: Geddes, SD, US · Science & Technology · Latest available filing year: 2012 · Primary form: IRS Form 990-N

  83. Order of the Eastern Star of South Dakota

    EIN 237172481 · Headquarters: Sisseton, SD, US · Mutual & Membership Benefit · Latest available filing year: 2008 · Primary form: IRS Form 990-N

  84. Order of the Eastern Star of South Dakota

    EIN 237172486 · Headquarters: WATERTOWN, SD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  85. Order of the Eastern Star of South Dakota

    EIN 237172491 · Headquarters: Vermillion, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  86. Order of the Eastern Star of South Dakota

    EIN 237172495 · Headquarters: PIERRE, SD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  87. Order of the Eastern Star of South Dakota

    EIN 237172496 · Headquarters: Mitchell, SD, US · Mutual & Membership Benefit · Latest available filing year: 2013 · Primary form: IRS Form 990-N

  88. Order of the Eastern Star of South Dakota

    EIN 237172499 · Headquarters: Avon, SD, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  89. Order of the Eastern Star of South Dakota

    EIN 237172502 · Headquarters: Plankinton, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  90. Order of the Eastern Star of South Dakota

    EIN 237172506 · Headquarters: Centerville, SD, US · Mutual & Membership Benefit · Latest available filing year: 2008 · Primary form: IRS Form 990-N

  91. Order of the Eastern Star of South Dakota

    EIN 237172508 · Headquarters: Hot Springs, SD, US · Mutual & Membership Benefit · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  92. Order of the Eastern Star of South Dakota

    EIN 237172511 · Headquarters: Redfield, SD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  93. Order of the Eastern Star of South Dakota

    EIN 237172512 · Headquarters: White, SD, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  94. Order of the Eastern Star of South Dakota

    EIN 237172513 · Headquarters: Watertown, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  95. Order of the Eastern Star of South Dakota

    EIN 237172514 · Headquarters: De Smet, SD, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  96. Order of the Eastern Star of South Dakota

    EIN 237172516 · Headquarters: Huron, SD, US · Science & Technology · Latest available filing year: 2012 · Primary form: IRS Form 990-N

  97. Order of the Eastern Star of South Dakota

    EIN 237172517 · Headquarters: Miller, SD, US · Science & Technology · Latest available filing year: 2011 · Primary form: IRS Form 990-N

  98. Order of the Eastern Star of South Dakota

    EIN 237172520 · Headquarters: Watertown, SD, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  99. Order of the Eastern Star of South Dakota

    EIN 460151122 · Headquarters: Sioux Falls, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  100. Order of the Eastern Star of South Dakota

    EIN 460276352 · Headquarters: Aberdeen, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

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