Nonprofits in Watertown, South Dakota

Nonprofits in Watertown, South Dakota. Browse 222 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. Lake Area Technical College Foundation

    EIN 363860861 · Headquarters: WATERTOWN, SD, USA · Education · Latest available filing year: 2024 · Primary form: IRS Form 990

  2. Lake Area Zoological Society

    EIN 237294134 · Headquarters: WATERTOWN, SD, USA · Animal Related · Latest available filing year: 2025 · Primary form: IRS Form 990

  3. Lake Pelican Preservation Society

    EIN 261863034 · Headquarters: Watertown, SD, US · Unknown & Unclassified · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  4. Maas Foundation

    EIN 460393558 · Headquarters: WATERTOWN, SD, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2019 · Primary form: IRS Form 990-PF

  5. Marine Corps League

    EIN 300514098 · Headquarters: Watertown, SD, US · Unknown & Unclassified · Latest available filing year: 2012 · Primary form: IRS Form 990-N

  6. Marine Corps League

    EIN 300726022 · Headquarters: Watertown, SD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  7. Marine Corps League

    EIN 412030583 · Headquarters: Watertown, SD, US · Public & Societal Benefit · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  8. MDM Inc Dean Olson

    EIN 412206799 · Headquarters: Watertown, SD, US · Human Services · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  9. Mellette Memorial Association

    EIN 460241116 · Headquarters: WATERTOWN, SD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  10. Messer Family Foundation

    EIN 460437250 · Headquarters: WATERTOWN, SD, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  11. Midwest Evangelistic Association

    EIN 460359354 · Headquarters: WATERTOWN, SD, USA · Religion Related · Latest available filing year: 2025 · Primary form: IRS Form 990

  12. Military Vision

    EIN 841235718 · Headquarters: Watertown, SD, US · Religion Related · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  13. Modern Woodmen of America

    EIN 200762312 · Headquarters: WATERTOWN, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  14. Modern Woodmen of America

    EIN 237502645 · Headquarters: WATERTOWN, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  15. Modern Woodmen of America

    EIN 260398039 · Headquarters: Watertown, SD, US · Mutual & Membership Benefit · Latest available filing year: 2008 · Primary form: IRS Form 990-N

  16. Modern Woodmen of America

    EIN 844558699 · Headquarters: WATERTOWN, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  17. National Active and Retired Federal Employees Association

    EIN 466019214 · Headquarters: Watertown, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  18. 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

  19. 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

  20. National Association of Letter Carriers

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

  21. 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

  22. Native Hoop

    EIN 991206465 · Headquarters: Watertown, SD, US · Arts, Culture & Humanities · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  23. Neighborhood Pantry - Camp Butler

    EIN 934451498 · Headquarters: Watertown, SD, US · Food, Agriculture & Nutrition · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  24. Next Town Ministries

    EIN 873579723 · Headquarters: Watertown, SD, US · Religion Related · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  25. North Country Fiber Fair Inc

    EIN 450431897 · Headquarters: Watertown, SD, USA · Recreation & Sports · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  26. Northeast South Dakota Assc of Real

    EIN 466019443 · Headquarters: WATERTOWN, SD, USA · Community Improvement & Capacity Building · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  27. Northeast Unmet Needs Inc

    EIN 460447969 · Headquarters: WATERTOWN, SD, US · Public Safety, Disaster Preparedness & Relief · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  28. Northern Prairie Arts

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

  29. Operation Lunchbox Inc

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

  30. OPTIMIST INTERNATIONAL Watertown Optimist Club

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

  31. 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

  32. 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

  33. 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

  34. Our Little Village Learning Center at Harmony Hill

    EIN 332163714 · Headquarters: Watertown, SD, US · Human Services · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  35. Parent Booster USA Inc

    EIN 454412491 · Headquarters: Watertown, SD, US · Education · Latest available filing year: 2014 · Primary form: IRS Form 990-N

  36. Prairie Lakes Healthcare Foundation

    EIN 460350240 · Headquarters: WATERTOWN, SD, USA · Health Care · Latest available filing year: 2024 · Primary form: IRS Form 990

  37. Prairie Lakes Hospital Auxiliary

    EIN 460022463 · Headquarters: Watertown, SD, US · Health Care · Latest available filing year: 2012 · Primary form: IRS Form 990-N

  38. Prairie Lakes Legacy Fund Inc

    EIN 395100975 · Headquarters: WATERTOWN, SD, USA · Health Care · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  39. Redleg Riders Chapter Militiamen Vmc Inc

    EIN 881811667 · Headquarters: WATERTOWN, SD, US · Public & Societal Benefit · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  40. Redlin Art Center

    EIN 460445310 · Headquarters: WATERTOWN, SD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  41. Rising Star Athletics Booster Club

    EIN 871419445 · Headquarters: Watertown, SD, USA · Recreation & Sports · Latest available filing year: 2024 · Primary form: IRS Form 990

  42. Rotary Club of Watertown

    EIN 466014971 · Headquarters: WATERTOWN, SD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  43. Royal Arch Masons of South Dakota

    EIN 237188927 · Headquarters: Watertown, SD, US · Mutual & Membership Benefit · Latest available filing year: 2014 · Primary form: IRS Form 990-N

  44. Sanford Health Watertown

    EIN 460391067 · Headquarters: Watertown, SD, United States · Health Care · Latest available filing year: 2024 · Primary form: IRS Form 990

  45. Sarahs Treasures Rescue

    EIN 271659458 · Headquarters: WATERTOWN, SD, US · Animal Related · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  46. Sd Academy of Family Physicians

    EIN 461258404 · Headquarters: WATERTOWN, SD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  47. Search and Rescue Support Inc

    EIN 611498896 · Headquarters: WATERTOWN, SD, USA · Health Care · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  48. Serra International

    EIN 460457701 · Headquarters: WATERTOWN, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  49. Sioux Rural Water System Inc

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

  50. 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

  51. Sons of Norway

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

  52. Soroptimist International of the Americas Inc

    EIN 466015224 · Headquarters: Watertown, SD, US · Crime & Legal Related · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  53. South Dakota Amateur Hockey Association

    EIN 460409014 · Headquarters: WATERTOWN, SD, USA · Youth Development · Latest available filing year: 2024 · Primary form: IRS Form 990

  54. South Dakota American Legion Foundation

    EIN 272710401 · Headquarters: WATERTOWN, SD, US · Human Services · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  55. South Dakota Chapter of American Society of Tax Professionals

    EIN 460396860 · Headquarters: Watertown, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  56. Temple Building Association of Watertown Sd

    EIN 233103244 · Headquarters: Watertown, SD, US · Community Improvement & Capacity Building · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  57. The American Legion Department of South Dakota

    EIN 460105110 · Headquarters: WATERTOWN, SD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  58. The Upside of Downs

    EIN 451990582 · Headquarters: WATERTOWN, SD, US · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  59. The Village of Harmony Hill Inc

    EIN 871680315 · Headquarters: WATERTOWN, SD, USA · Housing & Shelter · Latest available filing year: 2024 · Primary form: IRS Form 990

  60. Toastmasters International

    EIN 901506076 · Headquarters: Watertown, SD, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  61. Tops Club Inc

    EIN 474833204 · Headquarters: Watertown, SD, US · Health Care · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  62. Tower Industry Family Support Charitable Foundation

    EIN 462814417 · Headquarters: Watertown, SD, USA · Health Care · Latest available filing year: 2025 · Primary form: IRS Form 990

  63. Town Players

    EIN 460341725 · Headquarters: WATERTOWN, SD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  64. Troy Cemetary Association

    EIN 611557939 · Headquarters: Watertown, SD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  65. United States Bowling Congress Inc

    EIN 841697976 · Headquarters: Watertown, SD, US · Recreation & Sports · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  66. Veterans Memorial Corporation

    EIN 711039501 · Headquarters: Watertown, SD, US · Education · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  67. Veterans of Foreign Wars Department of South Dakota Auxiliary

    EIN 460386765 · Headquarters: Watertown, SD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  68. Veterans of Foreign Wars Department of South Dakota Auxiliary

    EIN 466019331 · Headquarters: Watertown, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  69. Veterans of Foreign Wars of the U S Dept of South Dakota Ladies Aux

    EIN 466019373 · Headquarters: Watertown, SD, US · Public & Societal Benefit · Latest available filing year: 2014 · Primary form: IRS Form 990-N

  70. Veterans of Foreign Wars of the Us 750 Watertown Vfw Sd

    EIN 460214611 · Headquarters: Watertown, SD, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  71. Vietnam Veterans of America Chapter 1054

    EIN 320341982 · Headquarters: Watertown, SD, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  72. Vietnam Veterans of America Inc

    EIN 352570541 · Headquarters: Watertown, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  73. Voluntary Employee's Beneficiary Association

    EIN 460443644 · Headquarters: Watertown, SD, USA · Mutual & Membership Benefit · Latest available filing year: 2023 · Primary form: IRS Form 990-EZ

  74. Watertown Anglers Association

    EIN 923085597 · Headquarters: Watertown, SD, US · Recreation & Sports · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  75. Watertown Area Career Learning Center

    EIN 460407199 · Headquarters: Watertown, SD, USA · Employment · Latest available filing year: 2012 · Primary form: IRS Form 990-EZ

  76. Watertown Area Chamber of Commerce

    EIN 460203350 · Headquarters: WATERTOWN, SD, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990

  77. Watertown Area Community Foundation

    EIN 460350319 · Headquarters: WATERTOWN, SD, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2024 · Primary form: IRS Form 990

  78. Watertown Area Community Foundation Inc

    EIN 920449173 · Headquarters: WATERTOWN, SD, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2024 · Primary form: IRS Form 990

  79. Watertown Area Diabetes Coalition

    EIN 432070608 · Headquarters: Watertown, SD, US · Diseases, Disorders & Medical Disciplines · Latest available filing year: 2007 · Primary form: IRS Form 990-N

  80. Watertown Area Home Builders Associ

    EIN 275006323 · Headquarters: WATERTOWN, SD, USA · Community Improvement & Capacity Building · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  81. Watertown Area Homes of Hope

    EIN 263324144 · Headquarters: Watertown, SD, US · Religion Related · Latest available filing year: 2011 · Primary form: IRS Form 990-N

  82. Watertown Area Memory Care & Aging

    EIN 363428764 · Headquarters: WATERTOWN, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  83. Watertown Area People Against Child Hunger

    EIN 463296115 · Headquarters: WATERTOWN, SD, USA · Food, Agriculture & Nutrition · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  84. Watertown Area Snow Queen

    EIN 881716088 · Headquarters: WATERTOWN, SD, US · Youth Development · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  85. Watertown Area Swim Club

    EIN 460337969 · Headquarters: WATERTOWN, SD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  86. Watertown Area Transit Inc

    EIN 411908759 · Headquarters: WATERTOWN, SD, USA · Community Improvement & Capacity Building · Latest available filing year: 2019 · Primary form: IRS Form 990-EZ

  87. Watertown Area United Way Inc

    EIN 460359557 · Headquarters: WATERTOWN, SD, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2024 · Primary form: IRS Form 990

  88. Watertown Arrows Softball

    EIN 993085295 · Headquarters: WATERTOWN, SD, US · Recreation & Sports · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  89. Watertown Artwalk Inc

    EIN 471914083 · Headquarters: WATERTOWN, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  90. Watertown Banquet

    EIN 460441373 · Headquarters: WATERTOWN, SD, US · Human Services · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  91. Watertown Baseball Association

    EIN 460369994 · Headquarters: WATERTOWN, SD, USA · Recreation & Sports · Latest available filing year: 2025 · Primary form: IRS Form 990

  92. Watertown Bicycle Club

    EIN 273994531 · Headquarters: Watertown, SD, US · Recreation & Sports · Latest available filing year: 2016 · Primary form: IRS Form 990-N

  93. Watertown Bowling Usbc Ba Association

    EIN 204431369 · Headquarters: Watertown, SD, US · Recreation & Sports · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  94. Watertown Breast Cancer Support Gro

    EIN 462840191 · Headquarters: WATERTOWN, SD, US · Diseases, Disorders & Medical Disciplines · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  95. Watertown Business and Professional Womens Club of Watertown South Dak

    EIN 466012571 · Headquarters: WATERTOWN, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  96. Watertown Business Association Inc

    EIN 205073275 · Headquarters: Watertown, SD, US · Community Improvement & Capacity Building · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  97. Watertown Cares Inc

    EIN 921696277 · Headquarters: WATERTOWN, SD, USA · Housing & Shelter · Latest available filing year: 2025 · Primary form: IRS Form 990

  98. Watertown Christian School

    EIN 363809047 · Headquarters: WATERTOWN, SD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  99. Watertown Christian School Foundati

    EIN 274348367 · Headquarters: WATERTOWN, SD, USA · Education · Latest available filing year: 2024 · Primary form: IRS Form 990

  100. Watertown Concert Association

    EIN 466012238 · Headquarters: Watertown, SD, USA · Arts, Culture & Humanities · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

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