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. Oluwa Inc

    EIN 842844560 · Headquarters: Brown Deer, WI, US · Arts, Culture & Humanities · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  2. Olympic Village Inc

    EIN 862143714 · Headquarters: SUN PRAIRIE, WI, USA · Housing & Shelter · Latest available filing year: 2024 · Primary form: IRS Form 990

  3. Olyver & Co Inc

    EIN 994753947 · Headquarters: Wauwatosa, WI, US · Animal Related · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  4. Om Sakthi Community Services Inc

    EIN 843717784 · Headquarters: Brookfield, WI, USA · Religion Related · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  5. Omega Enterprises Veba Associated Trust Co Na

    EIN 396514138 · Headquarters: GREEN BAY, WI, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  6. Omega of Pi Lambda Phi House Corporation

    EIN 390812978 · Headquarters: FITCHBURG, WI, USA · Recreation & Sports · Latest available filing year: 2024 · Primary form: IRS Form 990

  7. Omega Psi Phi Fraternity Epsilon Theta Chapter

    EIN 237065925 · Headquarters: Madison, WI, US · Education · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  8. Omega School Inc

    EIN 391166888 · Headquarters: MADISON, WI, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  9. Omicron Alpha Chapter of Sigma Gamma Rho Sorority Inc

    EIN 260640525 · Headquarters: MILWAUKEE, WI, US · Education · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  10. Omicron Delta Epsilon

    EIN 320309175 · Headquarters: La Crosse, WI, US · Education · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  11. Omicron Delta Epsilon Intl Honor Society in Economics Inc

    EIN 237348881 · Headquarters: Platteville, WI, US · Education · Latest available filing year: 2007 · Primary form: IRS Form 990-N

  12. Omicron Delta Epsilon Intl Honor Society in Economics Inc

    EIN 742592788 · Headquarters: Milwaukee, WI, US · Education · Latest available filing year: 2008 · Primary form: IRS Form 990-N

  13. Omicron Kappa Upsilon Honorary Dental Society

    EIN 237134586 · Headquarters: Milwaukee, WI, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  14. Omni Glass and Paint Inc Veba Health Savings Trust

    EIN 264828146 · Headquarters: Oshkosh, WI, US · Mutual & Membership Benefit · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  15. Omni Life

    EIN 823809760 · Headquarters: Milwaukee, WI, US · Youth Development · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  16. Omolade Academy Ujima Parent Teacher Organization Inc

    EIN 333801223 · Headquarters: Appleton, WI, US · Education · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  17. Omro Antique Tractor Club Inc

    EIN 391701691 · Headquarters: Pickett, WI, US · Recreation & Sports · Latest available filing year: 2013 · Primary form: IRS Form 990-N

  18. Omro Area Community Center

    EIN 391809175 · Headquarters: Omro, WI, US · Community Improvement & Capacity Building · Latest available filing year: 2024 · Primary form: IRS Form 990

  19. Omro Area Historical Society Inc

    EIN 930777805 · Headquarters: OMRO, WI, US · Arts, Culture & Humanities · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  20. Omro Backboard Club Inc

    EIN 270866661 · Headquarters: Omro, WI, US · Recreation & Sports · Latest available filing year: 2018 · Primary form: IRS Form 990-N

  21. Omro Bow Hunters Inc

    EIN 841730976 · Headquarters: Omro, WI, US · Recreation & Sports · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  22. Omro Community Food Pantry

    EIN 800517436 · Headquarters: OMRO, WI, US · Food, Agriculture & Nutrition · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  23. Omro Community Scholarship Corporation

    EIN 391786368 · Headquarters: Omro, WI, US · Education · Latest available filing year: 2007 · Primary form: IRS Form 990-N

  24. Omro Education Association

    EIN 391706995 · Headquarters: MADISON, WI, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  25. Omro High School Alumni Association Omro High School

    EIN 396099505 · Headquarters: OMRO, WI, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  26. Omro High School Booster Club Inc

    EIN 461560945 · Headquarters: Omro, WI, US · Education · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  27. Omro Main Street Program

    EIN 454047714 · Headquarters: OMRO, WI, US · Community Improvement & Capacity Building · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  28. Omro Paraprofessional Food Service Association

    EIN 391752944 · Headquarters: MADISON, WI, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  29. Omro Pto

    EIN 562340605 · Headquarters: Omro, WI, US · Education · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  30. Omro Rushford Volunteer Fire Department Inc

    EIN 200431148 · Headquarters: Omro, WI, USA · Public Safety, Disaster Preparedness & Relief · Latest available filing year: 2024 · Primary form: IRS Form 990

  31. Omro Scouting Corporation

    EIN 831568230 · Headquarters: Omro, WI, US · Youth Development · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  32. Omro Thrift Store Inc

    EIN 391886637 · Headquarters: OMRO, WI, USA · Human Services · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  33. Omro Tournament Baseball Club Inc

    EIN 393747642 · Headquarters: Omro, WI, US · Recreation & Sports · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  34. Omro Veterans Memorial Inc

    EIN 300655228 · Headquarters: Omro, WI, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  35. Omro Youth Football Foundation Inc

    EIN 393745311 · Headquarters: OMRO, WI, US · Recreation & Sports · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  36. Omtown Yogis

    EIN 462301409 · Headquarters: Bayside, WI, US · Community Improvement & Capacity Building · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  37. Omulu Capoeira Group

    EIN 061760786 · Headquarters: Fitchburg, WI, US · Arts, Culture & Humanities · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  38. On a Mission for Families Inc

    EIN 455444546 · Headquarters: WAUKESHA, WI, US · Human Services · Latest available filing year: 2013 · Primary form: IRS Form 990-N

  39. On a Shoestring Inc

    EIN 822913515 · Headquarters: Mequon, WI, US · Human Services · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  40. On Broadway Inc

    EIN 391825541 · Headquarters: GREEN BAY, WI, USA · Community Improvement & Capacity Building · Latest available filing year: 2023 · Primary form: IRS Form 990

  41. On Course For A Cure Inc

    EIN 821470012 · Headquarters: Madison, WI, USA · Diseases, Disorders & Medical Disciplines · Latest available filing year: 2020 · Primary form: IRS Form 990-EZ

  42. On Eagles Wings 4Ul Inc

    EIN 473655577 · Headquarters: Milwaukee, WI, US · Housing & Shelter · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  43. On Purpose Trauma-informed Care Llc

    EIN 872185003 · Headquarters: Brookfield, WI, US · Mental Health & Crisis Intervention · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  44. On Stage 4 Cancer Inc

    EIN 991103587 · Headquarters: GREEN BAY, WI, USA · Arts, Culture & Humanities · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  45. On the Map Orienteering Inc

    EIN 871552982 · Headquarters: Madison, WI, US · Youth Development · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  46. On The Mark Dyslexia Clinic

    EIN 822766656 · Headquarters: GREEN BAY, WI, USA · Education · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  47. On the Spectrum

    EIN 473273426 · Headquarters: Kewaskum, WI, US · Diseases, Disorders & Medical Disciplines · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  48. On-track

    EIN 391945369 · Headquarters: Racine, WI, US · Education · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  49. Onalaska Area Business Assn

    EIN 391606101 · Headquarters: Onalaska, WI, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  50. Onalaska Area Historical Society Inc

    EIN 391552879 · Headquarters: Onalaska, WI, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  51. Onalaska Art Keepers Inc

    EIN 854348724 · Headquarters: Onalaska, WI, US · Arts, Culture & Humanities · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  52. Onalaska Community Days

    EIN 852841450 · Headquarters: ONALASKA, WI, US · Community Improvement & Capacity Building · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  53. Onalaska Education Association

    EIN 237272295 · Headquarters: MADISON, WI, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  54. Onalaska Emergency Food Basket

    EIN 391484972 · Headquarters: Onalaska, WI, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  55. Onalaska Enhancement Foundation Inc

    EIN 264705880 · Headquarters: ONALASKA, WI, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2024 · Primary form: IRS Form 990

  56. Onalaska Firefighters Association Inc

    EIN 391984058 · Headquarters: Onalaska, WI, US · Public Safety, Disaster Preparedness & Relief · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  57. Onalaska Football Booster Club

    EIN 391720318 · Headquarters: Onalaska, WI, US · Education · Latest available filing year: 2013 · Primary form: IRS Form 990-N

  58. Onalaska Foundation for Educational Excellence Inc

    EIN 391934475 · Headquarters: ONALASKA, WI, USA · Education · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  59. Onalaska High School Alumni Association

    EIN 262235474 · Headquarters: Onalaskah, WI, US · Education · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  60. Onalaska High School Band Boosters Inc

    EIN 311773559 · Headquarters: Onalaska, WI, US · Education · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  61. Onalaska High School Boys Hockey Booster Club Inc

    EIN 391840818 · Headquarters: ONALASKA, WI, US · Education · Latest available filing year: 2013 · Primary form: IRS Form 990-N

  62. Onalaska High School Show Choir Parent Support Group

    EIN 391581976 · Headquarters: ONALASKA, WI, USA · Education · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  63. Onalaska Hilltopper Athl Booster C

    EIN 462269936 · Headquarters: ONALASKA, WI, USA · Recreation & Sports · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  64. Onalaska Merrymakers 4-H Club

    EIN 391438076 · Headquarters: La Crosse, WI, US · Youth Development · Latest available filing year: 2014 · Primary form: IRS Form 990-N

  65. Onalaska Middle School Pto

    EIN 263650430 · Headquarters: Onalaska, WI, US · Education · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  66. Onalaska Royal Basketball Booster Club Inc

    EIN 391797251 · Headquarters: Onalaska, WI, US · Recreation & Sports · Latest available filing year: 2015 · Primary form: IRS Form 990-N

  67. Onalaska Senior Citizens Ltd

    EIN 391599657 · Headquarters: Onalaska, WI, US · Human Services · Latest available filing year: 2007 · Primary form: IRS Form 990-N

  68. Onalaska Volleyball Booster Club

    EIN 273336808 · Headquarters: Onalaska, WI, US · Unknown & Unclassified · Latest available filing year: 2013 · Primary form: IRS Form 990-N

  69. Onalaskaholmen Tornado Youth Hockey

    EIN 391500008 · Headquarters: ONALASKA, WI, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  70. Once Upon a Pedestal

    EIN 264632490 · Headquarters: Marshfield, WI, US · Diseases, Disorders & Medical Disciplines · Latest available filing year: 2011 · Primary form: IRS Form 990-N

  71. Once Upon a Preschool Inc

    EIN 472294884 · Headquarters: SHOREWOOD, WI, USA · Education · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  72. Once Upon a Prom Inc

    EIN 465573226 · Headquarters: Eau Claire, WI, US · Human Services · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  73. Once Wayward Brethren Ministries

    EIN 475054738 · Headquarters: Milwaukee, WI, US · Religion Related · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  74. Oncidium Foundation USA Inc

    EIN 394491691 · Headquarters: Dousman, WI, US · Medical Research · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  75. Oncology Nursing Society

    EIN 521822328 · Headquarters: Madison, WI, US · Health Care · Latest available filing year: 2007 · Primary form: IRS Form 990-N

  76. One Acchord Performance Co

    EIN 203812862 · Headquarters: Tomah, WI, US · Arts, Culture & Humanities · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  77. One Accord Foundation

    EIN 274513399 · Headquarters: Menomonee Falls, WI, US · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  78. One Acre Foundation Inc

    EIN 880578694 · Headquarters: Juneau, WI, US · Environment · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  79. One Act of Giving Foundation Inc

    EIN 821585669 · Headquarters: New Berlin, WI, US · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  80. One Another Inc

    EIN 871796945 · Headquarters: WATERLOO, WI, US · Food, Agriculture & Nutrition · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  81. One Athlete at a Time Inc

    EIN 811209528 · Headquarters: KENOSHA, WI, US · Human Services · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  82. One Battle Inc

    EIN 933233253 · Headquarters: Eau Claire, WI, US · Human Services · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  83. One Big Tent of Portage County

    EIN 863793354 · Headquarters: Stevens Point, WI, US · Religion Related · Latest available filing year: 2025 · Primary form: IRS Form 990

  84. One Choice Concepts Inc

    EIN 842918011 · Headquarters: MILWAUKEE, WI, USA · Community Improvement & Capacity Building · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  85. One City Advocates Inc

    EIN 993931808 · Headquarters: MONONA, WI, USA · Education · Latest available filing year: 2024 · Primary form: IRS Form 990

  86. One City Broadway Inc

    EIN 871816024 · Headquarters: MADISON, WI, USA · Education · Latest available filing year: 2024 · Primary form: IRS Form 990

  87. One City Schools Foundation Inc

    EIN 874101609 · Headquarters: MADISON, WI, USA · Education · Latest available filing year: 2024 · Primary form: IRS Form 990

  88. One City Schools Inc

    EIN 471490574 · Headquarters: MADISON, WI, USA · Human Services · Latest available filing year: 2024 · Primary form: IRS Form 990

  89. One Dream Team

    EIN 831634599 · Headquarters: Green Bay, WI, US · Civil Rights, Social Action & Advocacy · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  90. One Drum Solutions Inc

    EIN 391866016 · Headquarters: Ashland, WI, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  91. One Heart

    EIN 923615563 · Headquarters: Dalton, WI, US · Religion Related · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  92. One Heart Inc

    EIN 264424267 · Headquarters: BARABOO, WI, US · Human Services · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  93. One Hope Inc

    EIN 472524313 · Headquarters: Milwaukee, WI, US · Religion Related · Latest available filing year: 2016 · Primary form: IRS Form 990-N

  94. One Hundred Percent Milwaukee

    EIN 333557086 · Headquarters: Milwaukee, WI, US · Arts, Culture & Humanities · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  95. One Life at a Time Small Breed Rescue

    EIN 264222011 · Headquarters: Germantown, WI, US · Animal Related · Latest available filing year: 2014 · Primary form: IRS Form 990-N

  96. One Life Liberia Inc

    EIN 823814014 · Headquarters: Madison, WI, US · Education · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  97. One Love Harmonizing Mind Body Spirit

    EIN 812457277 · Headquarters: APPLETON, WI, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  98. One Mighty Fortress Foundation Ltd

    EIN 992697407 · Headquarters: Kenosha, WI, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  99. One More Step Inc

    EIN 271587968 · Headquarters: Appleton, WI, US · Recreation & Sports · Latest available filing year: 2014 · Primary form: IRS Form 990-N

  100. One Small Drop

    EIN 262759592 · Headquarters: Iola, WI, US · International, Foreign Affairs & National Security · Latest available filing year: 2019 · Primary form: IRS Form 990-N

First page and all pages