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. Optimist International

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

  2. Optimist International

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

  3. Optimist International

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

  4. Optimist International

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

  5. Optimist International

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

  6. Optimist International

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

  7. Optimist International

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

  8. Optimist International

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

  9. Optimist International Brookings

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

  10. OPTIMIST INTERNATIONAL Watertown Optimist Club

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

  11. 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

  12. Orange Crushers

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

  13. 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

  14. 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

  15. 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

  16. 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

  17. 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

  18. 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

  19. 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

  20. 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

  21. 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

  22. 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

  23. 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

  24. 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

  25. 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

  26. 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

  27. 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

  28. 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

  29. 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

  30. 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

  31. 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

  32. 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

  33. 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

  34. 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

  35. 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

  36. 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

  37. 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

  38. 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

  39. 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

  40. 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

  41. 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

  42. 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

  43. 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

  44. Order of the Eastern Star of South Dakota

    EIN 460355904 · Headquarters: Murdo, SD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  45. Order of the Eastern Star of South Dakota

    EIN 460355905 · Headquarters: RAPID CITY, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  46. Order of the Eastern Star of South Dakota

    EIN 466012338 · Headquarters: SPEARFISH, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  47. Order of the Eastern Star of South Dakota

    EIN 466012716 · Headquarters: Hermosa, SD, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  48. Order of the Eastern Star of South Dakota

    EIN 466019190 · Headquarters: Gettysburg, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  49. Organic Crop Improvement Assoc South Dakota Chapter No 1

    EIN 753087299 · Headquarters: Selby, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  50. Original High Plains Regional Rendezvous Assoc

    EIN 800698789 · Headquarters: Mansfield, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  51. Ottis UW Ken FBO DWU Biology Dept

    EIN 206991787 · Headquarters: Sioux Falls, SD, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  52. Our Home Inc

    EIN 237163006 · Headquarters: HURON, SD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  53. Our Lady of Fatima Council No 15817

    EIN 464026148 · Headquarters: Alexandria, SD, US · Unknown & Unclassified · Latest available filing year: 2016 · Primary form: IRS Form 990-N

  54. Our Savior Church

    EIN 814403135 · Headquarters: Edgemont, SD, US · Unknown & Unclassified · Latest available filing year: 2017 · Primary form: IRS Form 990-N

  55. Our Savior's Lutheran Church Foundation

    EIN 460352771 · Headquarters: SIOUX FALLS, SD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  56. Outback Railroad Association

    EIN 333917171 · Headquarters: BRUCE, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  57. PAC N Heat

    EIN 813334818 · Headquarters: Hartford, SD, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  58. Parker Pheasants Youth Wrestling

    EIN 823413295 · Headquarters: PARKER, SD, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  59. Parkston Area Development Corporation

    EIN 460444442 · Headquarters: PARKSTON, SD, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  60. Parkston Commercial Club

    EIN 363665973 · Headquarters: PARKSTON, SD, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  61. Parkston Historical Society

    EIN 900330652 · Headquarters: PARKSTON, SD, USA · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-PF

  62. Parkview Apartments Inc

    EIN 237405616 · Headquarters: ARLINGTON, SD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  63. Parkview Evangelical Church

    EIN 460320915 · Headquarters: RAPID CITY, SD, USA · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-T

  64. Patton-cronkhite Foundation

    EIN 541715989 · Headquarters: SPEARFISH, SD, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  65. Pc Shuffleboard Club

    EIN 743250204 · Headquarters: Sioux Falls, SD, US · Unknown & Unclassified · Latest available filing year: 2011 · Primary form: IRS Form 990-N

  66. Peden-cole Post 109 Gary Sd

    EIN 460278839 · Headquarters: GARY, SD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  67. Pennsylvania Burglar & Fire Alarm Assoc

    EIN 232148317 · Headquarters: CUSTER, SD, USA · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-EZ

  68. People Against Childhood Hunger of Waubay

    EIN 472687608 · Headquarters: Waubay, SD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  69. Perkins County Rural Water System Inc

    EIN 460426436 · Headquarters: BISON, SD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  70. Perpetual Care & Maintenance Fund of Sunset Memorial Gardens

    EIN 466011164 · Headquarters: Aberdeen, SD, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  71. Peter Nelson Charitable Foundation

    EIN 816010230 · Headquarters: Rapid City, SD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  72. Peterson-Bahde-Coleman Homes Inc

    EIN 460343163 · Headquarters: Redfield, SD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  73. Peterson-petersen Family Reunion

    EIN 472843665 · Headquarters: Isabel, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  74. Pflag Inc

    EIN 471540988 · Headquarters: SAINT ONGE, SD, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  75. Phi Upsilon Omicron Inc

    EIN 460368470 · Headquarters: Brookings, SD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  76. Phi Upsilon Omicron Inc

    EIN 466015062 · Headquarters: Brookings, SD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  77. Philip Charities

    EIN 460356278 · Headquarters: Philip, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  78. Pi Kappa Alpha Fraternity

    EIN 462076581 · Headquarters: Brookings, SD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  79. Pi Mu Epsilon Fraternity

    EIN 462401373 · Headquarters: SIOUX FALLS, SD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  80. Pi Mu Epsilon Inc

    EIN 460458227 · Headquarters: VERMILLION, SD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  81. Pi Mu Epsilon Inc

    EIN 460458228 · Headquarters: BROOKINGS, SD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  82. Pi Tau Sigma

    EIN 466017103 · Headquarters: Brookings, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  83. Pickstown and Fort Randall Museum Foundation

    EIN 460991170 · Headquarters: Pickstown, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  84. Piedmont Community Center Inc

    EIN 460349329 · Headquarters: Piedmont, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  85. Pierpont Rural Fire Department

    EIN 900615512 · Headquarters: pierpont, SD, US · Unknown & Unclassified · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  86. Pierre Area Chamber of Commerce

    EIN 460177425 · Headquarters: PIERRE, SD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  87. Pierre Area Referral Service

    EIN 460317107 · Headquarters: Pierre, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  88. Pierre Area Senior Citizens Center

    EIN 460315686 · Headquarters: PIERRE, SD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  89. Pierre Economic Development Corporation

    EIN 460371993 · Headquarters: PIERRE, SD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  90. Pierre Elks Lodge #1953

    EIN 460241031 · Headquarters: Pierre, SD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  91. Pierre Swim Team Inc

    EIN 363373285 · Headquarters: PIERRE, SD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-T

  92. Pierre Volunteer Fire Department

    EIN 466014562 · Headquarters: PIERRE, SD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  93. Pine Rock Foundation Inc

    EIN 411698350 · Headquarters: SIOUX FALLS, SD, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  94. Pioneer Apartments Inc

    EIN 237431302 · Headquarters: SPEARFISH, SD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  95. Pioneer Memorial Manors Incorporated

    EIN 460275287 · Headquarters: SPEARFISH, SD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  96. Plankinton Community Development Company Inc

    EIN 460322556 · Headquarters: Plankinton, SD, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  97. Platte Senior Citizens Community Group

    EIN 237401842 · Headquarters: Platte, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  98. Pleasant Hill Cemetery Association

    EIN 460177933 · Headquarters: Alcester, SD, US · Unknown & Unclassified · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  99. Pleasant Valley School

    EIN 363291846 · Headquarters: Flandreau, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  100. Pmi Sioux Empire South Dakota

    EIN 412130937 · Headquarters: Sioux Falls, SD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

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