Unknown & Unclassified nonprofits in South Dakota

Unknown & Unclassified nonprofits in South Dakota. Browse 2,816 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. National American University Foundation

    EIN 237010355 · Headquarters: Rapid City, SD, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  2. National Assn of Letter Carriers

    EIN 466014945 · Headquarters: SIOUX FALLS, SD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  3. National Assn of Tower Erectors Dba NATE

    EIN 460437154 · Headquarters: Watertown, SD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  4. National Association of Fsa County Office Employees

    EIN 466014981 · Headquarters: Milbank, SD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  5. National Association of Insurance & Financial Advisors Glacial Lakes

    EIN 460450263 · Headquarters: Watertown, SD, US · Unknown & Unclassified · Latest available filing year: 2017 · Primary form: IRS Form 990-N

  6. National Association of Insurance Women

    EIN 466024289 · Headquarters: Sioux Falls, SD, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  7. National Association of Letter Carriers

    EIN 460311033 · Headquarters: Sioux Falls, SD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  8. National Association of Letter Carriers

    EIN 466013034 · Headquarters: WATERTOWN, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  9. National Association of Letter Carriers

    EIN 466014947 · Headquarters: Madison, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  10. National Association of Women in Construction

    EIN 460354053 · Headquarters: Rapid City, SD, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  11. National Association of Women in Construction

    EIN 510216832 · Headquarters: Sioux Falls, SD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  12. National Association of Women in Construction

    EIN 934093226 · Headquarters: Watertown, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  13. National Bison Association

    EIN 841026558 · Headquarters: RAPID CITY, SD, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  14. National Bowhunter Education Foundation Inc

    EIN 953605758 · Headquarters: RAPID CITY, SD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  15. National Exchange Club

    EIN 237331284 · Headquarters: Pierre, SD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  16. National Exchange Club

    EIN 460361493 · Headquarters: Rapid City, SD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  17. National Exchange Club of Mitchell

    EIN 237019555 · Headquarters: MITCHELL, SD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  18. National Federation of the Blind of South Dakota Inc

    EIN 460348322 · Headquarters: Brookings, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  19. National Field Archery Association

    EIN 951793456 · Headquarters: Yankton, SD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  20. National Field Archery Association Foundation

    EIN 330430066 · Headquarters: YANKTON, SD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  21. National Goose Council

    EIN 410981756 · Headquarters: Sisseton, SD, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  22. National Guard Association of SD

    EIN 460347842 · Headquarters: Rapid City, SD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  23. National Lamb Feeders Association

    EIN 942392583 · Headquarters: PIERRE, SD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  24. National Network of Immunization Nurses and Associates Inc

    EIN 481266249 · Headquarters: Nunda, SD, US · Unknown & Unclassified · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  25. National Order of Trench Rats

    EIN 460426208 · Headquarters: Sioux Falls, SD, US · Unknown & Unclassified · Latest available filing year: 2010 · Primary form: IRS Form 990-N

  26. National Organization for Women Inc

    EIN 813165834 · Headquarters: Rapid City, SD, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  27. National Rural Letter Carriers Association

    EIN 460338209 · Headquarters: Rapid City, SD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  28. National Rural Letter Carriers Association

    EIN 466014759 · Headquarters: Colton, SD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  29. National Society of the Children of the American Revolution

    EIN 900531356 · Headquarters: Sioux Falls, SD, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  30. National Society of the Children of the American Revolution

    EIN 900531357 · Headquarters: HOT SPRINGS, SD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  31. National Society of the Daughters of the American Revolution

    EIN 364766919 · Headquarters: Spearfish, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  32. National Society of the Daughters of the American Revolution

    EIN 460415116 · Headquarters: Wilmont, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  33. National Society of the Daughters of the American Revolution

    EIN 466012057 · Headquarters: Mellette, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  34. National Society of the Daughters of the American Revolution

    EIN 466014884 · Headquarters: Brookings, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  35. National Society of the Daughters of the American Revolution

    EIN 466014886 · Headquarters: Yankton, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  36. National Society of the Daughters of the American Revolution

    EIN 466014895 · Headquarters: Hot Springs, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  37. National Society of the Daughters of the American Revolution

    EIN 815359483 · Headquarters: Mitchell, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  38. National Society of the Daughters of the American Revolution

    EIN 900901278 · Headquarters: Aberdeen, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  39. National Society of the Sons of the American Revolution

    EIN 466014987 · Headquarters: EDGEMONT, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  40. National Treasury Employees Union

    EIN 466014548 · Headquarters: Aberdeen, SD, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  41. Native Hope Inc

    EIN 473851180 · Headquarters: CHAMBERLAIN, SD, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990

  42. Native Youth Leadership Alliance

    EIN 272503270 · Headquarters: Pine Ridge, SD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  43. Navy League of the United States South Dakota Council

    EIN 812770159 · Headquarters: Sioux Falls, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  44. Nd Rough Rider State Org Intl Good Sam Recreational Vehicle Club

    EIN 300469641 · Headquarters: Lemmon, SD, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  45. Ne South Dakota Community Action Program Inc

    EIN 460282100 · Headquarters: SISSETON, SD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  46. Nebraska-Iowa Wireless Association Inc

    EIN 264138654 · Headquarters: GARY, SD, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  47. Needs Anonymous Inc

    EIN 363792230 · Headquarters: Webster, SD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  48. Nesd Family Violence Prevention Conference

    EIN 932974798 · Headquarters: ABERDEEN, SD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  49. Never Give Up Coaching & Life Skills Group 81

    EIN 921466768 · Headquarters: Sioux Falls, SD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  50. New Adventures of Tripp Co

    EIN 872635124 · Headquarters: Winner, SD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  51. New Dawn Enterprises

    EIN 460377419 · Headquarters: STURGIS, SD, USA · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990

  52. New Heights for America

    EIN 934878531 · Headquarters: Sioux Falls, SD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  53. New Oak Christian Church

    EIN 510167624 · Headquarters: Sioux Falls, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  54. New Underwood Community Development Corporation

    EIN 460403968 · Headquarters: New Underwood, SD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  55. New Underwood Community Volunteer Fire Department

    EIN 237304932 · Headquarters: New Underwood, SD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  56. New Underwood High School Alumni Association

    EIN 460453875 · Headquarters: RAPID CITY, SD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  57. New Underwood Roping Club Inc

    EIN 363687405 · Headquarters: New Underwood, SD, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  58. Newdale School

    EIN 363319319 · Headquarters: Elkton, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  59. Next Step Inc

    EIN 393192925 · Headquarters: EUREKA, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  60. Nope-Lincoln County Inc

    EIN 933970670 · Headquarters: Canton, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  61. Nora Cemetery Association

    EIN 466015789 · Headquarters: Alcester, SD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  62. North American Corriente Association

    EIN 810409680 · Headquarters: CHAMBERLAIN, SD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  63. North Bethlehem Cemetery Inc

    EIN 872011529 · Headquarters: Irene, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  64. North Central South Dakota Childrens Choir

    EIN 460980135 · Headquarters: Mitchell, SD, US · Unknown & Unclassified · Latest available filing year: 2013 · Primary form: IRS Form 990-N

  65. North Dakota School Nutrition Associatio

    EIN 450404738 · Headquarters: PIERRE, SD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  66. North Haines Volunteer Fire Dept

    EIN 460337229 · Headquarters: RAPID CITY, SD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  67. North Marshall Fire Department Association Inc

    EIN 237283707 · Headquarters: Britton, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  68. North Sioux City Volunteer Fire Department

    EIN 460418512 · Headquarters: North Sioux City, SD, US · Unknown & Unclassified · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  69. Northeast Chapter Bellator Titans Mc Inc

    EIN 993298900 · Headquarters: ABERDEEN, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  70. Northeast South Dakota Head Start Program Inc

    EIN 460395724 · Headquarters: ABERDEEN, SD, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990

  71. Northern Black Hills Society for Preservation of Performing Arts

    EIN 363320351 · Headquarters: Deadwood, SD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  72. Northern Electric Cooperative

    EIN 460151015 · Headquarters: BATH, SD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  73. Northern Hills Alcohol and Drug Inf

    EIN 466036107 · Headquarters: STURGIS, SD, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990

  74. Northern Hills Family Recreation

    EIN 460356630 · Headquarters: LEAD, SD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  75. Northern Prairie Arts

    EIN 460388085 · Headquarters: Watertown, SD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  76. Northern Route to the Black Hills Association

    EIN 050570164 · Headquarters: ABERDEEN, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  77. Northern State University Foundation

    EIN 237002314 · Headquarters: Aberdeen, SD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  78. Northern State University Science Club

    EIN 800677458 · Headquarters: Aberdeen, SD, US · Unknown & Unclassified · Latest available filing year: 2013 · Primary form: IRS Form 990-N

  79. Northwest Broadcast News Association

    EIN 411446130 · Headquarters: Sturgis, SD, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  80. Northwest Ranch Cowboys Association

    EIN 830204983 · Headquarters: Prairie City, SD, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  81. NorthWestern Energy Welfare Benefit Trust

    EIN 810495798 · Headquarters: Sioux Falls, SD, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  82. Oahe Chapel Preservation Society

    EIN 363358777 · Headquarters: Pierre, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  83. Oahe Child Development Center Inc

    EIN 237140269 · Headquarters: PIERRE, SD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  84. Oahe Electric Cooperative

    EIN 460221074 · Headquarters: Blunt, SD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  85. Oahe Habitat for Humanity Inc

    EIN 460430669 · Headquarters: PIERRE, SD, USA · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-EZ

  86. Oakwood Lakes Area Development Association Inc

    EIN 460352497 · Headquarters: volga, SD, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  87. Oceti Wakan (Sacred Fireplace)

    EIN 363900385 · Headquarters: Pine Ridge, SD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  88. Oelrichs Cemetery Association

    EIN 460404024 · Headquarters: Oelrichs, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  89. Olive Grove Golf Course Inc

    EIN 460402884 · Headquarters: GROTON, SD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  90. Olive Rice Reierson Foundation

    EIN 363463190 · Headquarters: Rapid City, SD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  91. 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

  92. On Hand Development Corporation

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

  93. Onaka Community Club Inc

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

  94. One Greatful America Inc

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

  95. One Voice Community Choir

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

  96. Onida Area Development Corporation

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

  97. Open

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

  98. Optimist International

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

  99. Optimist International

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

  100. Optimist International

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

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