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. American Legion Auxiliary

    EIN 466015203 · Headquarters: GREGORY, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  2. American Legion Auxiliary

    EIN 466015206 · Headquarters: Tyndall, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  3. American Legion Auxiliary

    EIN 466015234 · Headquarters: Pierre m, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  4. American Legion Auxiliary

    EIN 466015279 · Headquarters: Corsica, SD, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  5. American Legion Auxiliary

    EIN 466015283 · Headquarters: Centerville, SD, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  6. American Legion Auxiliary

    EIN 466015284 · Headquarters: Chester, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  7. American Legion Auxiliary

    EIN 466015288 · Headquarters: GAYVILLE, SD, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  8. American Legion Auxiliary

    EIN 466015289 · Headquarters: HUDSON, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  9. American Legion Auxiliary

    EIN 466015295 · Headquarters: Britton, SD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  10. American Legion Auxiliary

    EIN 466015350 · Headquarters: NUNDA, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  11. American Legion Auxiliary

    EIN 466015365 · Headquarters: Dallas, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  12. American Legion Auxiliary

    EIN 466015366 · Headquarters: DAVIS, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  13. American Legion Auxiliary

    EIN 466015369 · Headquarters: Sioux Falls, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  14. American Legion Auxiliary

    EIN 466015372 · Headquarters: Letcher, SD, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  15. American Legion Auxiliary

    EIN 466015446 · Headquarters: Iroquois, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  16. American Legion Auxiliary

    EIN 466015448 · Headquarters: Martin, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  17. American Legion Auxiliary

    EIN 466015450 · Headquarters: Volga, SD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  18. American Legion Auxiliary

    EIN 466015491 · Headquarters: Hayti, SD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  19. American Legion Auxiliary

    EIN 466015496 · Headquarters: Raymond, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  20. American Legion Auxiliary

    EIN 466015622 · Headquarters: Pierpont, SD, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  21. American Legion Auxiliary

    EIN 466015625 · Headquarters: Onida, SD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  22. American Legion Auxiliary

    EIN 466015663 · Headquarters: Stratford, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  23. American Legion Auxiliary

    EIN 466015711 · Headquarters: Worthing, SD, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  24. American Legion Auxiliary

    EIN 466015794 · Headquarters: Woonsocket, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  25. American Legion Auxiliary

    EIN 466040771 · Headquarters: CLEAR LAKE, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  26. American Legion Auxiliary

    EIN 473683466 · Headquarters: CHAMBERLAIN, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  27. American Legion Auxiliary

    EIN 510177468 · Headquarters: HERRICK, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  28. American Legion Auxiliary

    EIN 831633081 · Headquarters: Webster, SD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  29. American Legion Auxiliary

    EIN 862398550 · Headquarters: SIOUX FALLS, SD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  30. American Legion Auxiliary

    EIN 911790468 · Headquarters: Kimball, SD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  31. American Legion Auxiliary

    EIN 931770670 · Headquarters: Fairfax, SD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  32. American Legion Auxiliary 213 Hunt Newell

    EIN 800174017 · Headquarters: wecota, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  33. American Legion Auxiliary 311 Piedm Ont Valley

    EIN 800391670 · Headquarters: PIEDMONT, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  34. American Legion Auxiliary 42 Edgar L Herrick

    EIN 466014603 · Headquarters: Arlington, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  35. American Legion Auxiliary Dwight Wood Unit No 132

    EIN 510676377 · Headquarters: Springfield, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  36. American Legion Auxiliary Post 110 Watson Krauter

    EIN 466014865 · Headquarters: WESSINGTON, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  37. American Legion Auxiliary Post 318

    EIN 421762936 · Headquarters: BRANDON, SD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  38. American Legion Auxiliary Sidney Lovejoy Unit No 256 Dept of Sd

    EIN 466014846 · Headquarters: New Underwood, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  39. American Legion Auxiliary Unit 46

    EIN 992384169 · Headquarters: CUSTER, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  40. American Legion Auxiliary Unt 153 Carpenter Sd

    EIN 300847900 · Headquarters: Carpenter, SD, US · Unknown & Unclassified · Latest available filing year: 2016 · Primary form: IRS Form 990-N

  41. American Legion Bc Post No 240

    EIN 460220488 · Headquarters: MARTIN, SD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  42. American Legion Boys State

    EIN 466015039 · Headquarters: Rapid City, SD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  43. American Legion Brattvet Green Post 66

    EIN 460231186 · Headquarters: LEMMON, SD, USA · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990

  44. American Legion Henning-Shemanski 267

    EIN 466006816 · Headquarters: Grenville, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  45. American Legion Hutchison Post 6

    EIN 460222394 · Headquarters: GREGORY, SD, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  46. American Legion Jackson Hall Post 47

    EIN 333258971 · Headquarters: Artesain, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  47. American Legion Kennebec-reliance Sd

    EIN 466016079 · Headquarters: Kennebec, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  48. American Legion Newman Millage Post 201

    EIN 466019628 · Headquarters: PUKWANA, SD, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  49. American Legion Post

    EIN 466014660 · Headquarters: Lake Preston, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  50. American Legion Post #18

    EIN 460211748 · Headquarters: MITCHELL, SD, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  51. American Legion Post #8

    EIN 466008690 · Headquarters: PIERRE, SD, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  52. American Legion Post 0092 Clay-kaiser

    EIN 460276898 · Headquarters: REDFIELD, SD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  53. American Legion Post 11

    EIN 466006908 · Headquarters: BRIDGEWATER, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  54. American Legion Post 110 Watson Krauter

    EIN 466014717 · Headquarters: WESSINGTON, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  55. American Legion Post 146 Thayer Waters

    EIN 460310119 · Headquarters: COLOME, SD, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  56. American Legion Post 15

    EIN 460162150 · Headquarters: Sioux Falls, SD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  57. American Legion Post 169

    EIN 460167745 · Headquarters: WINNER, SD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  58. American Legion Post 170

    EIN 466014648 · Headquarters: HERREID, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  59. American Legion Post 175

    EIN 466015361 · Headquarters: BALTIC, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  60. American Legion Post 187

    EIN 466019624 · Headquarters: FAIRFAX, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  61. American Legion Post 194

    EIN 466014551 · Headquarters: PARKSTON, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  62. American Legion Post 22

    EIN 460213269 · Headquarters: Rapid City, SD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  63. American Legion Post 26

    EIN 460309735 · Headquarters: STICKNEY, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  64. American Legion Post 28

    EIN 466014616 · Headquarters: BURKE, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  65. American Legion Post 311

    EIN 460452833 · Headquarters: PIEDMONT, SD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  66. American Legion Post 33 Meade County

    EIN 460221026 · Headquarters: Sturgis, SD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  67. American Legion Post 36

    EIN 466014817 · Headquarters: BONESTEEL, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  68. American Legion Post 38

    EIN 466008140 · Headquarters: MILLER, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  69. American Legion Post 39

    EIN 460311727 · Headquarters: Groton, SD, USA · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990

  70. American Legion Post 65

    EIN 466013050 · Headquarters: DELL RAPIDS, SD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  71. American Legion Post 78 Roy S Hickman

    EIN 460270699 · Headquarters: LEOLA, SD, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  72. American Legion Potter Post 3

    EIN 460276865 · Headquarters: CHAMBERLAIN, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  73. American Legion Ruste-waul Post154

    EIN 471567787 · Headquarters: Montrose, SD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  74. American Legion Sidney L Smith Post 24

    EIN 460190558 · Headquarters: ABERDEEN, SD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  75. American Lutheran Church Endowment Inc

    EIN 460379824 · Headquarters: Huron, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  76. American Orff-schulwerk Association

    EIN 311348652 · Headquarters: Rapid City, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  77. American Pharmacists Association Academy of Student Pharmacists

    EIN 466015377 · Headquarters: Brookings, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  78. American Planning Association

    EIN 830274716 · Headquarters: Sioux Falls, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  79. American Postal Workers Union

    EIN 237018938 · Headquarters: Pierre, SD, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  80. American Postal Workers Union

    EIN 237343148 · Headquarters: WATERTOWN, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  81. American Postal Workers Union

    EIN 460437214 · Headquarters: Huron, SD, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  82. American Postal Workers Union - Mitchell Local

    EIN 452838393 · Headquarters: Mitchell, SD, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  83. AMERICAN POSTAL WORKERS UNION 718 Sioux Falls Area Local

    EIN 466014943 · Headquarters: Sioux Falls, SD, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  84. American Psychiatric Association

    EIN 460349135 · Headquarters: Sioux Falls, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  85. American Society for Clinical Laboratory Science

    EIN 237080235 · Headquarters: SIOUX FALLS, SD, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  86. American Society of Agricultural Engineers

    EIN 460458064 · Headquarters: Sioux Falls, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  87. American Society of Heating Refrigerating & A-c Engineers

    EIN 460341898 · Headquarters: BLACK HAWK, SD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  88. American Society of Heating Refrigerating & A-c Engineers

    EIN 466038552 · Headquarters: Sioux Falls, SD, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  89. American Society of Radiologic Technologists

    EIN 264378406 · Headquarters: Sioux Falls, SD, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  90. American Society of Radiologic Technologists

    EIN 466020108 · Headquarters: Sioux Falls, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  91. American String Teachers Association Incorporated

    EIN 208450243 · Headquarters: Aberdeen, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  92. American Volkssport Association 274 Black Hills Vokssport Association

    EIN 460411015 · Headquarters: RAPID CITY, SD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  93. American Volkssport Association Inc

    EIN 460403176 · Headquarters: Sioux Falls, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  94. Amo Cemetery Association

    EIN 416026002 · Headquarters: Marion, SD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  95. Amsat

    EIN 133402440 · Headquarters: Britton, SD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  96. Amvets Post 1

    EIN 922722894 · Headquarters: Milbank, SD, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-EZ

  97. Ancient & Accepted Scottish Rite Of

    EIN 460191692 · Headquarters: ABERDEEN, SD, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  98. Ancient & Accepted Scottish Rite of Free Masonry So Juris of USA

    EIN 460154335 · Headquarters: Sioux Falls, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  99. Ancient & Accepted Scottish Rite of Free Masonry Southern Jurisdiction

    EIN 460355837 · Headquarters: Yankton, SD, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  100. Ancient & Accepted Scottish Rite of Valley of Its Deadwood Coord Bodies

    EIN 237148757 · Headquarters: Deadwood, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

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