Nonprofits in Wisconsin

Nonprofits in Wisconsin. Browse 46,682 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. Oconto Whole Foods Cooperative

    EIN 391402944 · Headquarters: Pound, WI, US · Unknown & Unclassified · Latest available filing year: 2007 · Primary form: IRS Form 990-N

  2. Oconto Wrestling Club Inc

    EIN 881157448 · Headquarters: Oconto, WI, US · Recreation & Sports · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  3. Oconto Yacht Club

    EIN 396091732 · Headquarters: OCONTO, WI, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  4. Oconto Youth Center

    EIN 320039323 · Headquarters: Green Bay, WI, US · Youth Development · Latest available filing year: 2017 · Primary form: IRS Form 990-N

  5. Oconto Youth Football Inc

    EIN 113665001 · Headquarters: Oconto, WI, US · Recreation & Sports · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  6. Ocooch Mountain Broadheads Inc

    EIN 391631517 · Headquarters: Fennimore, WI, US · Environment · Latest available filing year: 2017 · Primary form: IRS Form 990-N

  7. Ocooch Mountain Humane Society

    EIN 300027124 · Headquarters: RICHLAND CENTER, WI, USA · Animal Related · Latest available filing year: 2024 · Primary form: IRS Form 990

  8. Ocooch Mountain Rescue Inc

    EIN 341999680 · Headquarters: GAYS MILLS, WI, USA · Public Safety, Disaster Preparedness & Relief · Latest available filing year: 2025 · Primary form: IRS Form 990

  9. Ocular Physiology Research and Education Foundation Inc

    EIN 391661745 · Headquarters: MADISON, WI, USA · Science & Technology · Latest available filing year: 2015 · Primary form: IRS Form 990-PF

  10. Odana Hills Golf Association

    EIN 930836309 · Headquarters: Madison, WI, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  11. Odc Foundation Inc

    EIN 844725410 · Headquarters: WISCONSIN RAPIDS, WI, USA · Human Services · Latest available filing year: 2024 · Primary form: IRS Form 990

  12. Odc Government Services Inc

    EIN 392039975 · Headquarters: WISCONSIN RAPIDS, WI, USA · Employment · Latest available filing year: 2024 · Primary form: IRS Form 990

  13. Odd Fellow Rebekah Home Association Inc

    EIN 390838135 · Headquarters: GREEN BAY, WI, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  14. Odu Americas

    EIN 471613643 · Headquarters: milwaukee, WI, US · International, Foreign Affairs & National Security · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  15. Odua Association in Milwaukee

    EIN 384122015 · Headquarters: MILWAUKEE, WI, USA · Arts, Culture & Humanities · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  16. Odyssey Academy of Virtual Learning Inc

    EIN 832027630 · Headquarters: Ripon, WI, US · Education · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  17. Odyssey Con Society

    EIN 471698598 · Headquarters: Madison, WI, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  18. Off the Chain Mke Inc

    EIN 465667303 · Headquarters: Wauwatosa, WI, US · Animal Related · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  19. Off the Table Farm Sanctuary Inc

    EIN 862663338 · Headquarters: Westfield, WI, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  20. Off Track on Course Thoroughbreds

    EIN 810715798 · Headquarters: Kewaskum, WI, US · Animal Related · Latest available filing year: 2018 · Primary form: IRS Form 990-N

  21. Office and Professional Employees International Union

    EIN 390791784 · Headquarters: Madison, WI, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  22. Office and Professional Employees International Union

    EIN 396076910 · Headquarters: eau claire, WI, US · Employment · Latest available filing year: 2018 · Primary form: IRS Form 990-N

  23. Office and Professional Employees International Union Local 35

    EIN 390745183 · Headquarters: BUTLER, WI, USA · Employment · Latest available filing year: 2015 · Primary form: IRS Form 990

  24. Office and Professional Employees International Union Local 95

    EIN 390986121 · Headquarters: WISCONSIN RAPIDS, WI, USA · Employment · Latest available filing year: 2017 · Primary form: IRS Form 990-EZ

  25. Officers of Avalon Inc

    EIN 061708526 · Headquarters: Baraboo, WI, US · Crime & Legal Related · Latest available filing year: 2010 · Primary form: IRS Form 990-N

  26. Offmonkey Inc

    EIN 853063953 · Headquarters: Madison, WI, US · Mental Health & Crisis Intervention · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  27. Ofs Holdings Inc

    EIN 813970591 · Headquarters: MADISON, WI, USA · Community Improvement & Capacity Building · Latest available filing year: 2023 · Primary form: IRS Form 990

  28. Ogema Area Development Corporation

    EIN 400022851 · Headquarters: OGEMA, WI, US · Community Improvement & Capacity Building · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  29. Ogema Area Our Town Association

    EIN 261732019 · Headquarters: Ogema, WI, US · Community Improvement & Capacity Building · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  30. Ogilvie Family Foundation Inc

    EIN 882469006 · Headquarters: NEENAH, WI, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  31. Oh Schlit Research Labs Inc

    EIN 393358247 · Headquarters: Grafton, WI, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  32. Oh4f Inc

    EIN 454120525 · Headquarters: WAUPUN, WI, USA · Human Services · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  33. Ohah Mission Corporation

    EIN 812794176 · Headquarters: Eau Claire, WI, US · Animal Related · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  34. Ohana Athletics Parent Association

    EIN 934484614 · Headquarters: Brookfield, WI, US · Recreation & Sports · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  35. Ohelaku Among the Corn Stalks

    EIN 384026057 · Headquarters: DE PERE, WI, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  36. Oheneba Foundation USA Inc

    EIN 873943248 · Headquarters: Waukesha, WI, US · International, Foreign Affairs & National Security · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  37. Ohio Public Policy Council

    EIN 992381663 · Headquarters: HUDSON, WI, USA · Civil Rights, Social Action & Advocacy · Latest available filing year: 2024 · Primary form: IRS Form 990

  38. Ohio State University Alumni Association Inc

    EIN 311505309 · Headquarters: Brookfield, WI, US · Education · Latest available filing year: 2018 · Primary form: IRS Form 990-N

  39. Ohioans for Fair Maps

    EIN 933425918 · Headquarters: Hudson, WI, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  40. Ohrigin

    EIN 880627984 · Headquarters: Milwaukee, WI, US · Religion Related · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  41. Ohs Drama Mamas and Papas Inc

    EIN 263646350 · Headquarters: OCONOMOWOC, WI, US · Education · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  42. Ohs Grid Iron Football Club Inc

    EIN 393641804 · Headquarters: Oconto, WI, US · Youth Development · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  43. Ohs Pto Inc

    EIN 275381131 · Headquarters: Oconomowoc, WI, US · Education · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  44. Oi Governmental Services Corporation

    EIN 841915588 · Headquarters: Fort Atkinson, WI, US · Employment · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  45. Oil Jar Inc

    EIN 883916137 · Headquarters: SAINT FRANCIS, WI, US · Human Services · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  46. Oil of Joy Ministries International Inc

    EIN 731629222 · Headquarters: BROOKFIELD, WI, USA · Religion Related · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  47. Oilgear Ferris Foundation

    EIN 396050126 · Headquarters: MILWAUKEE, WI, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2017 · Primary form: IRS Form 990-PF

  48. Oinkadoodlemoo Inc

    EIN 333260826 · Headquarters: Sparta, WI, US · Animal Related · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  49. Ojbs Inc

    EIN 364673012 · Headquarters: OSSEO, WI, USA · Recreation & Sports · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  50. Ojibwa Bowhunters of Milwaukee Inc

    EIN 396102122 · Headquarters: NEW BERLIN, WI, USA · Recreation & Sports · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  51. Ojibwa Community Club Inc

    EIN 320218010 · Headquarters: Winter, WI, US · Community Improvement & Capacity Building · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  52. Okauchee Area Atv Utv Club Inc

    EIN 882828834 · Headquarters: Oconomowoc, WI, US · Public Safety, Disaster Preparedness & Relief · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  53. Okauchee Area Business Association Ltd

    EIN 760790451 · Headquarters: Okauchee, WI, US · Community Improvement & Capacity Building · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  54. Okauchee Fire Department

    EIN 237454962 · Headquarters: OKAUCHEE, WI, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  55. Okauchee Fireworks Fund Ltd

    EIN 260120754 · Headquarters: Oconomowoc, WI, US · Human Services · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  56. Okauchee Lake Sailing School Inc

    EIN 391570760 · Headquarters: NASHOTAH, WI, USA · Recreation & Sports · Latest available filing year: 2024 · Primary form: IRS Form 990

  57. Okauchee Lake Yacht Club

    EIN 391470044 · Headquarters: OCONOMOWOC, WI, USA · Recreation & Sports · Latest available filing year: 2025 · Primary form: IRS Form 990

  58. Okee Bay Mill Pond Lake Association Inc

    EIN 923646223 · Headquarters: Lodi, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  59. Okeeffe Middle School Parent-teacher Group Inc

    EIN 460684475 · Headquarters: Madison, WI, US · Education · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  60. Okeeg Cemetery Association

    EIN 396066361 · Headquarters: Columbus, WI, US · Mutual & Membership Benefit · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  61. Okoa Toto Inc

    EIN 821380916 · Headquarters: Waukesha, WI, US · International, Foreign Affairs & National Security · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  62. Oktoberfest Singers

    EIN 391739813 · Headquarters: La Crosse, WI, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  63. Oktoberfest USA Gemutlichkeit Foundationinc

    EIN 392006630 · Headquarters: LA CROSSE, WI, USA · Arts, Culture & Humanities · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  64. Olbrich Botanical Society Foundation Inc

    EIN 392002821 · Headquarters: MADISON, WI, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990

  65. Olbrich Botanical Society Inc

    EIN 391357247 · Headquarters: MADISON, WI, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990

  66. Old Abe Booster Club

    EIN 391712262 · Headquarters: Eau Claire, WI, USA · Religion Related · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  67. Old Abe Football Club

    EIN 463785957 · Headquarters: EAU CLAIRE, WI, US · Recreation & Sports · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  68. Old Bones Animal Rescue

    EIN 842242352 · Headquarters: OSHKOSH, WI, USA · Animal Related · Latest available filing year: 2021 · Primary form: IRS Form 990-PF

  69. Old Boys Association of St Johns Military Academy

    EIN 396061108 · Headquarters: Delafield, WI, US · Education · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  70. Old Boys Scholarship Foundation

    EIN 396036633 · Headquarters: DELAFIELD, WI, USA · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-PF

  71. Old Church Road Cemetery Association

    EIN 391799539 · Headquarters: Madison, WI, US · Arts, Culture & Humanities · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  72. Old Farmers Antiques Inc

    EIN 205243094 · Headquarters: ARKDALE, WI, US · Arts, Culture & Humanities · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  73. Old Franklin Township Historic Society

    EIN 582684981 · Headquarters: Plain, WI, US · Arts, Culture & Humanities · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  74. Old House Enthusiasts Inc

    EIN 391772383 · Headquarters: LANCASTER, WI, US · Arts, Culture & Humanities · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  75. Old Middleton Road Apartments Inc

    EIN 201427325 · Headquarters: MADISON, WI, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  76. Old Paths Christian Ministries Inc

    EIN 931954321 · Headquarters: Phelps, WI, US · Religion Related · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  77. Old Settlers Oktoberfest Inc

    EIN 464782199 · Headquarters: SALEM, WI, USA · Recreation & Sports · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  78. Old Time Auto Club-waupaca

    EIN 391839293 · Headquarters: Neenah, WI, US · Recreation & Sports · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  79. Old Time Ball Players Association of Wis

    EIN 390383435 · Headquarters: Oconomowoc, WI, US · Recreation & Sports · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  80. Old Time Ballplayers Association of Wisconsin Charity Inc

    EIN 334742217 · Headquarters: Oconomowoc, WI, US · Recreation & Sports · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  81. Old Timers Athletic Club Inc

    EIN 452441258 · Headquarters: RACINE, WI, US · Recreation & Sports · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  82. Old Timers Football Association Inc

    EIN 260491096 · Headquarters: Racine, WI, US · Recreation & Sports · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  83. Old World Wisconsin Foundation Inc

    EIN 391484170 · Headquarters: ELKHORN, WI, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  84. Old-brule Heritage Society Inc

    EIN 391946720 · Headquarters: Poplar, WI, US · Arts, Culture & Humanities · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  85. Old-fashioned Fools Inc

    EIN 365131342 · Headquarters: FOND DU LAC, WI, US · Public Safety, Disaster Preparedness & Relief · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  86. Olde Main Street Green Bay Inc

    EIN 391941545 · Headquarters: GREEN BAY, WI, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2022 · Primary form: IRS Form 990-EZ

  87. Olde Norwood Neighborhood Association

    EIN 261820658 · Headquarters: green bay, WI, US · Unknown & Unclassified · Latest available filing year: 2014 · Primary form: IRS Form 990-N

  88. Olde Preble Neighborhood Association

    EIN 832725085 · Headquarters: Green Bay, WI, US · Community Improvement & Capacity Building · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  89. Olga Brener Pto

    EIN 391833759 · Headquarters: SHAWANO, WI, USA · Education · Latest available filing year: 2013 · Primary form: IRS Form 990-EZ

  90. Olga Neighborhood Wellness Services Inc

    EIN 934130542 · Headquarters: Milwaukee, WI, US · Mental Health & Crisis Intervention · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  91. Olga V Alexandria Fdn

    EIN 942936907 · Headquarters: MILWAUKEE, WI, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  92. Olioed

    EIN 821044229 · Headquarters: RACINE, WI, US · Education · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  93. Olive & Eunice Toussaint Fdn Inv Agy

    EIN 273459246 · Headquarters: MILWAUKEE, WI, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  94. Olive Health Community Mobile Clinic

    EIN 812804947 · Headquarters: Appleton, WI, US · Health Care · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  95. Olive Tree Ministries Inc

    EIN 391561398 · Headquarters: Fond Du Lac, WI, US · Religion Related · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  96. Oliver T Donovan Tw

    EIN 396045096 · Headquarters: GREEN BAY, WI, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  97. Oliveros Scholarship Fund

    EIN 451486584 · Headquarters: Middleton, WI, US · Education · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  98. Olivia C Eaton Trust R55945001

    EIN 900330188 · Headquarters: MILWAUKEE, WI, USA · Unknown & Unclassified · Latest available filing year: 2011 · Primary form: IRS Form 990-PF

  99. Olov Camps Inc

    EIN 815362207 · Headquarters: Denmark, WI, US · Recreation & Sports · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  100. Olsenarts Theater Group Inc

    EIN 342062536 · Headquarters: Milwaukee, WI, US · Arts, Culture & Humanities · Latest available filing year: 2013 · Primary form: IRS Form 990-N

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