Nonprofits in Madison, Wisconsin

Nonprofits in Madison, Wisconsin. Browse 4,170 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. Shriners International

    EIN 237325142 · Headquarters: Madison, WI, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  2. Shriners International

    EIN 237361963 · Headquarters: Madison, WI, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  3. Shriners International

    EIN 237410951 · Headquarters: Madison, WI, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  4. Shriners International

    EIN 391448391 · Headquarters: Madison, WI, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  5. Shriners International

    EIN 581752721 · Headquarters: Madison, WI, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  6. Shriners International

    EIN 581870399 · Headquarters: Madison, WI, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  7. Shriners International

    EIN 901674296 · Headquarters: Madison, WI, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  8. Sidekick Education

    EIN 831877071 · Headquarters: Madison, WI, USA · Education · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  9. Sieg Foundation

    EIN 316665297 · Headquarters: MADISON, WI, USA · Education · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  10. Sigma Alpha Epsilon Corporation

    EIN 396053042 · Headquarters: Madison, WI, USA · Education · Latest available filing year: 2016 · Primary form: IRS Form 990

  11. Sigma Alpha Mu Fraternity

    EIN 391605964 · Headquarters: Madison, WI, US · Education · Latest available filing year: 2015 · Primary form: IRS Form 990-N

  12. Sigma Alpha Omega Christian Sorority Inc

    EIN 821169268 · Headquarters: MADISON, WI, US · Education · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  13. Sigma Chi Fraternity

    EIN 390803127 · Headquarters: MADISON, WI, US · Education · Latest available filing year: 2018 · Primary form: IRS Form 990-N

  14. Sigma Delta Epsilon Graduate Women in Science Inc

    EIN 396077394 · Headquarters: Madison, WI, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  15. Sigma Delta Tau - Alpha Nu Chapter

    EIN 920241656 · Headquarters: Madison, WI, USA · Education · Latest available filing year: 2024 · Primary form: IRS Form 990

  16. Sigma Phi Epsilon Fraternity Inc

    EIN 390975684 · Headquarters: MADISON, WI, US · Education · Latest available filing year: 2017 · Primary form: IRS Form 990-N

  17. Sigma Pi Fraternity International Inc

    EIN 260060210 · Headquarters: Madison, WI, US · Education · Latest available filing year: 2008 · Primary form: IRS Form 990-N

  18. Sigma Pi Fraternity International Inc

    EIN 800358763 · Headquarters: Madison, WI, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  19. Sigma Psi Zeta Sorority Inc - Alpha Pi

    EIN 841797685 · Headquarters: Madison, WI, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  20. Sigma Tau Gamma Fraternity D/b/a Eta Nu

    EIN 842623136 · Headquarters: MADISON, WI, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  21. Sigma Theta Tau Inc

    EIN 237243779 · Headquarters: Madison, WI, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  22. Signschool Inc

    EIN 472664763 · Headquarters: Madison, WI, US · Education · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  23. Silver Lining Foundation Inc

    EIN 481255726 · Headquarters: MADISON, WI, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  24. Siren Education Association

    EIN 391544461 · Headquarters: MADISON, WI, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  25. Siren Education Support Professionals

    EIN 262904695 · Headquarters: MADISON, WI, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  26. Sister House Inc

    EIN 261857765 · Headquarters: Madison, WI, US · Human Services · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  27. Sitti Foundation Inc

    EIN 334104419 · Headquarters: Madison, WI, US · Human Services · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  28. Six Action

    EIN 203169871 · Headquarters: MADISON, WI, USA · Civil Rights, Social Action & Advocacy · Latest available filing year: 2024 · Primary form: IRS Form 990

  29. Skincare4madison

    EIN 881131511 · Headquarters: Madison, WI, USA · Human Services · Latest available filing year: 2024 · Primary form: IRS Form 990

  30. Slinger Education Association

    EIN 237088255 · Headquarters: MADISON, WI, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  31. Slinger Education Support Professionals Association

    EIN 391813424 · Headquarters: MADISON, WI, US · Education · Latest available filing year: 2013 · Primary form: IRS Form 990-N

  32. Slipstream Group Inc

    EIN 391356152 · Headquarters: MADISON, WI, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990

  33. Slow Food USA Inc

    EIN 010825085 · Headquarters: Madison, WI, US · Food, Agriculture & Nutrition · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  34. Smart Growth Greater Madison Inc

    EIN 431987370 · Headquarters: MADISON, WI, USA · Community Improvement & Capacity Building · Latest available filing year: 2025 · Primary form: IRS Form 990

  35. Sms Foundation Inc

    EIN 201878599 · Headquarters: MADISON, WI, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  36. Snake Conservation Society Inc

    EIN 272386396 · Headquarters: Madison, WI, US · Animal Related · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  37. Snowbird Foundation Inc C/o John Suby

    EIN 810955604 · Headquarters: MADISON, WI, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2022 · Primary form: IRS Form 990-PF

  38. Snowkraft Corporation

    EIN 843212778 · Headquarters: Madison, WI, US · Recreation & Sports · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  39. Soar Case Management Services Inc

    EIN 391917503 · Headquarters: MADISON, WI, USA · Mental Health & Crisis Intervention · Latest available filing year: 2024 · Primary form: IRS Form 990

  40. Social Justice Center Inc

    EIN 391979881 · Headquarters: Madison, WI, USA · Community Improvement & Capacity Building · Latest available filing year: 2024 · Primary form: IRS Form 990

  41. Society for Affective Science Inc

    EIN 460568830 · Headquarters: MADISON, WI, USA · Science & Technology · Latest available filing year: 2025 · Primary form: IRS Form 990

  42. Society for Magnetic Resonance Angiography C/o Dr Oliver Wieben

    EIN 371794536 · Headquarters: MADISON, WI, USA · Diseases, Disorders & Medical Disciplines · Latest available filing year: 2024 · Primary form: IRS Form 990

  43. Society for Ming Studies

    EIN 862181337 · Headquarters: MADISON, WI, US · Education · Latest available filing year: 2025 · Primary form: IRS Form 990-N

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

    EIN 237014776 · Headquarters: Madison, WI, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  45. Society for Quantitative Ethnography Inc

    EIN 833840661 · Headquarters: Madison, WI, USA · Education · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  46. Society for the Furtherance & Study of Fantasy & Science Fiction

    EIN 391256799 · Headquarters: Madison, WI, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  47. Society of Broadcast Engineers Chapter 24 Incorporated

    EIN 272780426 · Headquarters: Madison, WI, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  48. Society of Pediatric Echocardiography - Sope

    EIN 270940450 · Headquarters: MADISON, WI, USA · Diseases, Disorders & Medical Disciplines · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  49. Society of Phi Zeta

    EIN 223103617 · Headquarters: Madison, WI, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  50. Society of Risk Management Consultants

    EIN 363388306 · Headquarters: MADISON, WI, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  51. Society of St Vincent De Paul

    EIN 392027840 · Headquarters: Madison, WI, US · Education · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  52. Society of St Vincent De Paul Diocesan Council of Madison Inc

    EIN 851491020 · Headquarters: Madison, WI, US · Food, Agriculture & Nutrition · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  53. Society of Women Engineers

    EIN 431607250 · Headquarters: Madison, WI, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  54. Soderholm Family Foundation Inc

    EIN 932881594 · Headquarters: MADISON, WI, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  55. Sognfjordlaget in America

    EIN 391569594 · Headquarters: Madison, WI, US · Recreation & Sports · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  56. Soil Science Society of America Inc

    EIN 390967853 · Headquarters: MADISON, WI, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  57. Solace Friends Inc

    EIN 831754134 · Headquarters: Madison, WI, USA · Human Services · Latest available filing year: 2024 · Primary form: IRS Form 990

  58. Solaid International Inc

    EIN 260248633 · Headquarters: Madison, WI, US · International, Foreign Affairs & National Security · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  59. Sole Save Our Lake Environment Inc

    EIN 205629629 · Headquarters: Madison, WI, US · Environment · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  60. Solomon Enterprises Inc

    EIN 550899755 · Headquarters: Madison, WI, US · Crime & Legal Related · Latest available filing year: 2008 · Primary form: IRS Form 990-N

  61. Solorlaget I Amerika

    EIN 411463823 · Headquarters: Madison, WI, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  62. Somerset Education Association - Sea

    EIN 237086959 · Headquarters: MADISON, WI, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  63. Sonic Sport Club Inc

    EIN 825365005 · Headquarters: MADISON, WI, USA · Recreation & Sports · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  64. Sons of Union Veterans of the Civil War

    EIN 237319909 · Headquarters: Madison, WI, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  65. Soulutions Inc

    EIN 830405148 · Headquarters: Madison, WI, US · Religion Related · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  66. Sound Doctrine

    EIN 391869585 · Headquarters: Madison, WI, US · Religion Related · Latest available filing year: 2010 · Primary form: IRS Form 990-N

  67. Sound Ensemble Wisconsin Corporation

    EIN 453744760 · Headquarters: Madison, WI, US · Arts, Culture & Humanities · Latest available filing year: 2011 · Primary form: IRS Form 990-N

  68. South Central Federation of Labor

    EIN 390934972 · Headquarters: Madison, WI, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  69. South Central Library System Foundation Inc

    EIN 392020856 · Headquarters: MADISON, WI, USA · Education · Latest available filing year: 2025 · Primary form: IRS Form 990

  70. South Central Regional Trauma Advisory Council Inc

    EIN 843459270 · Headquarters: Madison, WI, US · Health Care · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  71. South Central Wisconsin Housing Foundation Inc

    EIN 391655997 · Headquarters: Madison, WI, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  72. South Madison Coalition of the Elderly Inc

    EIN 391222287 · Headquarters: MADISON, WI, USA · Human Services · Latest available filing year: 2018 · Primary form: IRS Form 990

  73. South Metropolitan Planning Council Inc

    EIN 391866505 · Headquarters: Madison, WI, US · Community Improvement & Capacity Building · Latest available filing year: 2018 · Primary form: IRS Form 990-N

  74. South Milwaukee Education Support Professionals Association

    EIN 262707393 · Headquarters: MADISON, WI, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  75. South Milwaukee Educational Association

    EIN 237080532 · Headquarters: MADISON, WI, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  76. South Shore Education Association

    EIN 237161564 · Headquarters: MADISON, WI, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  77. Southeast Asian Healing Center Incorporated

    EIN 832393889 · Headquarters: Madison, WI, USA · Human Services · Latest available filing year: 2024 · Primary form: IRS Form 990

  78. Southern Area Land and Water Conservation Association

    EIN 934126381 · Headquarters: Madison, WI, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  79. Southern Door Education Association

    EIN 237083196 · Headquarters: MADISON, WI, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  80. Southern Door Educational Support Personnel

    EIN 391492781 · Headquarters: MADISON, WI, US · Education · Latest available filing year: 2013 · Primary form: IRS Form 990-N

  81. Southern WI Association for Continuing Higher Ed

    EIN 320058533 · Headquarters: Madison, WI, US · Education · Latest available filing year: 2018 · Primary form: IRS Form 990-N

  82. Southern Wisconsin Bird Alliance Inc

    EIN 391393389 · Headquarters: MADISON, WI, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990

  83. Southern Wisconsin Bluegrass Music Association Inc

    EIN 391472936 · Headquarters: Madison, WI, US · Arts, Culture & Humanities · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  84. Southern Wisconsin Chapter of Trout Unlimited

    EIN 237282818 · Headquarters: Madison, WI, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  85. Southside Raiders Football & Cheerleading Inc

    EIN 471276326 · Headquarters: Madison, WI, US · Recreation & Sports · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  86. Southwest Education Association Retired

    EIN 020628866 · Headquarters: MADISON, WI, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  87. Southwestern School Support Staff

    EIN 262771383 · Headquarters: MADISON, WI, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  88. Space

    EIN 820921109 · Headquarters: Madison, WI, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  89. Sparta Classified Employees Association

    EIN 391503988 · Headquarters: MADISON, WI, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  90. Spartans Youth Football Inc

    EIN 452645398 · Headquarters: Madison, WI, US · Recreation & Sports · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  91. Special Olympics Wisconsin Inc

    EIN 391176591 · Headquarters: MADISON, WI, USA · Recreation & Sports · Latest available filing year: 2024 · Primary form: IRS Form 990

  92. Special Olympics Wisconsin Inc Group Return

    EIN 391803735 · Headquarters: MADISON, WI, USA · Recreation & Sports · Latest available filing year: 2013 · Primary form: IRS Form 990

  93. Specialty Care Free Clinic Inc

    EIN 823567991 · Headquarters: MADISON, WI, USA · Health Care · Latest available filing year: 2024 · Primary form: IRS Form 990

  94. Spencer Education Association

    EIN 237088300 · Headquarters: MADISON, WI, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  95. Spider Shores Foundation Inc

    EIN 205706620 · Headquarters: MADISON, WI, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2010 · Primary form: IRS Form 990-PF

  96. Spooner Education Association

    EIN 237082233 · Headquarters: MADISON, WI, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  97. Sports Medicine Roundtable Inc

    EIN 391885787 · Headquarters: Madison, WI, US · Diseases, Disorders & Medical Disciplines · Latest available filing year: 2015 · Primary form: IRS Form 990-N

  98. Spransy Foundation Inc

    EIN 814257984 · Headquarters: Madison, WI, US · International, Foreign Affairs & National Security · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  99. Spring Harbor Middle School Parent Teacher Organization Inc

    EIN 824743880 · Headquarters: Madison, WI, US · Education · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  100. SSM Health

    EIN 430688874 · Headquarters: Madison, WI, US · Health Care · Latest available filing year: 2024 · Primary form: IRS Form 990

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