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. Sioux Empire Kennel Club Inc

    EIN 466015757 · Headquarters: SIOUX FALLS, SD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  2. Sioux Empire SHRM

    EIN 363679504 · Headquarters: Sioux Falls, SD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  3. Sioux Empire United Way Inc

    EIN 460233701 · Headquarters: SIOUX FALLS, SD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  4. Sioux Falls Airshow Inc

    EIN 460404634 · Headquarters: Sioux Falls, SD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  5. Sioux Falls Arts Council

    EIN 460354287 · Headquarters: SIOUX FALLS, SD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  6. Sioux Falls Ballooning Association

    EIN 460396889 · Headquarters: Sioux Falls, SD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  7. Sioux Falls Bridge Club

    EIN 466017027 · Headquarters: Sioux Falls, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  8. Sioux Falls Catholic School Corporation

    EIN 460413591 · Headquarters: Sioux Falls, SD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-T

  9. Sioux Falls Childrens Choir

    EIN 813148851 · Headquarters: SIOUX FALLS, SD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  10. Sioux Falls Chinese School

    EIN 271328173 · Headquarters: Sioux Falls, SD, US · Unknown & Unclassified · Latest available filing year: 2017 · Primary form: IRS Form 990-N

  11. Sioux Falls Development Foundation Inc

    EIN 460243934 · Headquarters: SIOUX FALLS, SD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  12. Sioux Falls Downtown Lions Club

    EIN 466011178 · Headquarters: Sioux Falls, SD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  13. Sioux Falls Educational Assistants Association

    EIN 471718337 · Headquarters: Pierre, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  14. Sioux Falls Environmental Access Inc

    EIN 460346270 · Headquarters: SIOUX FALLS, SD, USA · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-PF

  15. Sioux Falls Firefighters Benevolent Foundation

    EIN 680589701 · Headquarters: SIOUX FALLS, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  16. Sioux Falls Junior Chamber of Commerce

    EIN 460189401 · Headquarters: SIOUX FALLS, SD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  17. Sioux Falls Lodge No 9 - Independent Order of Odd Fellows

    EIN 465476959 · Headquarters: Sioux Falls, SD, US · Unknown & Unclassified · Latest available filing year: 2014 · Primary form: IRS Form 990-N

  18. Sioux Falls Mens 12-Inch Slowpitch Softball League Inc

    EIN 460361620 · Headquarters: SIOUX FALLS, SD, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  19. Sioux Falls Quilters Guild Inc

    EIN 142003445 · Headquarters: SIOUX FALLS, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  20. Sioux Falls Referral Network

    EIN 463686339 · Headquarters: Sioux Falls, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  21. Sioux Falls Regional 600 Bowlers Club

    EIN 450778036 · Headquarters: Sioux Falls, SD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  22. Sioux Falls Right to Life

    EIN 832845118 · Headquarters: SIOUX FALLS, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  23. Sioux Falls Snowmobile Club-the Sno-trackers

    EIN 460388701 · Headquarters: Sioux Falls, SD, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  24. Sioux Falls St Pats Extravaganza Inc

    EIN 460412307 · Headquarters: Sioux Falls, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  25. Sioux Falls Trades & Labor

    EIN 460189587 · Headquarters: Sioux Falls, SD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  26. Sioux Falls Youth Hockey Association

    EIN 460427805 · Headquarters: SIOUX FALLS, SD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  27. Sioux River Rodeo Club

    EIN 364072084 · Headquarters: Flandreau, SD, USA · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-PF

  28. Sioux Roundup Inc

    EIN 460444478 · Headquarters: SIOUX FALLS, SD, US · Unknown & Unclassified · Latest available filing year: 2012 · Primary form: IRS Form 990-N

  29. Sioux Rural Water System Inc

    EIN 460319686 · Headquarters: Watertown, SD, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  30. Sioux Steel Company Foundation

    EIN 466012618 · Headquarters: SIOUX FALLS, SD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  31. Sioux Valley Genealogical Society

    EIN 460356408 · Headquarters: Sioux Falls, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  32. Sioux Wheelers Inc

    EIN 460366809 · Headquarters: Dell Rapids, SD, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  33. Siouxland Chapter of the Risk Management Association

    EIN 814389124 · Headquarters: Sioux Falls, SD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  34. Siouxland Civic Dance Association

    EIN 421231496 · Headquarters: MCCOOK LAKE, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  35. Siouxland Youth Shooters Organization

    EIN 223888172 · Headquarters: Renner, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  36. Siphon Hill Water Association Inc

    EIN 271546243 · Headquarters: Rapid City, SD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  37. Sisseton Economic Development Corporation

    EIN 363482696 · Headquarters: SISSETON, SD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  38. Sisseton Senior Citizens Association Inc

    EIN 237225638 · Headquarters: SISSETON, SD, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  39. Sisseton Swimming Pool Assoc Inc

    EIN 460367034 · Headquarters: SISSETON, SD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  40. Sister Cities Assn of Sioux Falls

    EIN 460411673 · Headquarters: Sioux Falls, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  41. Sisters of the Presentation of Blessed Virgin Mary

    EIN 460253283 · Headquarters: ABERDEEN, SD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-T

  42. Slammers

    EIN 473326645 · Headquarters: SIOUX FALLS, SD, USA · Unknown & Unclassified · Latest available filing year: 2017 · Primary form: IRS Form 990-EZ

  43. Slew Crew Ranch Rodeo

    EIN 862100475 · Headquarters: WILLOW LAKE, SD, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  44. Smith-wright Post 120

    EIN 466006923 · Headquarters: isabel, SD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  45. Society for Preservation & Encourmt of Barbershop Quartet Singing Amer

    EIN 237175145 · Headquarters: Watertown, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  46. Society for Preservation & Encourmt of Barbershop Quartet Singing Amer

    EIN 460307265 · Headquarters: Sioux Falls, SD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  47. Society for Preservation & Encrgmnt of Barbershop Quartet Singing Amer

    EIN 460340946 · Headquarters: Mitchell, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  48. Society for Preservation & Encrgmnt of Barbershop Quartet Singing Amer

    EIN 466016248 · Headquarters: Vermillion, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  49. Society for Preservation & Encrgmnt of Barbershop Quartet Singing Amer

    EIN 467067848 · Headquarters: Rapid City, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  50. Society of American Foresters

    EIN 521273260 · Headquarters: Rapid City, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  51. Society of Black Hills Pioneers

    EIN 460323680 · Headquarters: Belle Fourche, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  52. Society of Health and Physical Educators

    EIN 460368310 · Headquarters: Mitchell, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  53. Society of Mayflower Descendants in the State of South Dakota

    EIN 237241746 · Headquarters: HOT SPRINGS, SD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  54. Society of St Vincent De Paul of Sioux Falls

    EIN 460383607 · Headquarters: SIOUX FALLS, SD, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990

  55. Sodak 350

    EIN 881938500 · Headquarters: Sioux Falls, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  56. Sodak Showmen of Union County 4-H Club of South Dakota

    EIN 934245202 · Headquarters: Canton, SD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  57. Soil and Water Conservation Society

    EIN 460343868 · Headquarters: Fort Pierre, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  58. Solutions for Resilient Communities Inc

    EIN 422285565 · Headquarters: Spearfish, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  59. Sons of Norway

    EIN 237139224 · Headquarters: Sioux Falls, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  60. Sons of Norway

    EIN 237360849 · Headquarters: RAPID CITY, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  61. Sons of Norway

    EIN 237525657 · Headquarters: Brookings, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  62. Sons of Norway

    EIN 237525658 · Headquarters: Sioux Falls, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  63. Sons of Norway

    EIN 237525659 · Headquarters: Watertown, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  64. Sons of Norway

    EIN 460356904 · Headquarters: Mitchell, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  65. Sons of Norway

    EIN 460413474 · Headquarters: Aberdeen, SD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  66. Sons of Norway

    EIN 510172802 · Headquarters: Webster, SD, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  67. Sons of Norway

    EIN 510206259 · Headquarters: Belle Fourche, SD, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  68. Sons of Norway

    EIN 510206265 · Headquarters: Gary, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  69. Sorum Fire Department

    EIN 466039594 · Headquarters: Reva, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  70. South Central Child Development Inc

    EIN 460392050 · Headquarters: WAGNER, SD, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  71. South Central Development Corporation

    EIN 460397166 · Headquarters: WINNER, SD, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  72. South Dakota Academy of Nutrition and Dietetics

    EIN 460310418 · Headquarters: Sioux Falls, SD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  73. South Dakota Academy of Ophthalmology

    EIN 460332368 · Headquarters: SIOUX FALLS, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  74. South Dakota Academy of Physician Assistants

    EIN 460379893 · Headquarters: Vermillion, SD, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  75. South Dakota Academy of Science

    EIN 460272052 · Headquarters: Sioux Falls, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  76. South Dakota Access for Every Woman

    EIN 451476531 · Headquarters: SIOUX FALLS, SD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  77. South Dakota Advocacy Network for Women

    EIN 920346455 · Headquarters: Sioux Falls, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  78. South Dakota Ag Alliance

    EIN 934245619 · Headquarters: Pierre, SD, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  79. South Dakota Agri-business Association

    EIN 460274736 · Headquarters: PIERRE, SD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  80. South Dakota Alpha Chapter of Sigma Phi Epsilon

    EIN 460436062 · Headquarters: BROOKINGS, SD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  81. South Dakota Amateur Baseball Association

    EIN 460232266 · Headquarters: PARKSTON, SD, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  82. South Dakota Amateur Baseball Hall of Fame

    EIN 460338065 · Headquarters: LAKE NORDEN, SD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  83. South Dakota Amateur Billards

    EIN 271388566 · Headquarters: Rapid City, SD, USA · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-EZ

  84. South Dakota Animal Control Association

    EIN 450427923 · Headquarters: Huron, SD, US · Unknown & Unclassified · Latest available filing year: 2014 · Primary form: IRS Form 990-N

  85. South Dakota Assn of Plumbing - Heating - Cooling Contractors Inc

    EIN 460253627 · Headquarters: SIOUX FALLS, SD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  86. South Dakota Association for Lifelong Learning

    EIN 460387384 · Headquarters: Huron, SD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  87. South Dakota Association for Marriage and Family Therapy

    EIN 061803779 · Headquarters: Sioux Falls, SD, US · Unknown & Unclassified · Latest available filing year: 2018 · Primary form: IRS Form 990-N

  88. South Dakota Association of Assessing

    EIN 460354954 · Headquarters: Sturgis, SD, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  89. South Dakota Association of College

    EIN 460439943 · Headquarters: SIOUX FALLS, SD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  90. South Dakota Association of Conservation District Employees

    EIN 460344384 · Headquarters: Webster, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  91. South Dakota Association of Cooperatives

    EIN 460214081 · Headquarters: PIERRE, SD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  92. South Dakota Association of County Commissioners

    EIN 460277101 · Headquarters: PIERRE, SD, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  93. South Dakota Association of County Highway Superintendents

    EIN 460417237 · Headquarters: Sioux Falls, SD, US · Unknown & Unclassified · Latest available filing year: 2012 · Primary form: IRS Form 990-N

  94. South Dakota Association of Credit Specialists

    EIN 460445868 · Headquarters: Huron, SD, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  95. South Dakota Association of Enviromental Professionals

    EIN 460423048 · Headquarters: Sioux Falls, SD, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  96. South Dakota Association of Nurse Anesthetists

    EIN 466036687 · Headquarters: SPEARFISH, SD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  97. South Dakota Association of Rural Water Systems

    EIN 460340547 · Headquarters: MADISON, SD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  98. South Dakota Association of Towns and Townships

    EIN 460407937 · Headquarters: HURON, SD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  99. South Dakota Association of Video Lottery Establishment

    EIN 810561488 · Headquarters: Pierre, SD, US · Unknown & Unclassified · Latest available filing year: 2015 · Primary form: IRS Form 990-N

  100. South Dakota Association Pharmacy Technicians

    EIN 870808847 · Headquarters: Sioux Falls, SD, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

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