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. Master Lock Retirees

    EIN 472251725 · Headquarters: MILWAUKEE, WI, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  2. Master Singers of Milwaukee Inc

    EIN 391595091 · Headquarters: MILWAUKEE, WI, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  3. Masters Aviation Scholarship Fund

    EIN 413406182 · Headquarters: Oconto, WI, US · Education · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  4. Masters Craftsmen Inc

    EIN 933356583 · Headquarters: Oshkosh, WI, USA · Religion Related · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  5. Masters of Branding

    EIN 331769639 · Headquarters: Wausau, WI, US · Community Improvement & Capacity Building · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  6. Masters Orphanage Inc

    EIN 392149494 · Headquarters: WEST BEND, WI, US · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  7. Masters Wanna-be Charitable Fundraiser

    EIN 270075878 · Headquarters: Eagle, WI, US · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2007 · Primary form: IRS Form 990-N

  8. Mata Community Media Inc

    EIN 391487343 · Headquarters: MILWAUKEE, WI, USA · Arts, Culture & Humanities · Latest available filing year: 2016 · Primary form: IRS Form 990

  9. Matan Foundation Inc

    EIN 391994770 · Headquarters: Milwaukee, WI, US · Human Services · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  10. Match Inc

    EIN 061665038 · Headquarters: Milwaukee, WI, USA · Human Services · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  11. Matchmaker Pet Rescue and Adoption

    EIN 273911036 · Headquarters: Milwaukee, WI, US · Animal Related · Latest available filing year: 2017 · Primary form: IRS Form 990-N

  12. Mateo S Family Camp

    EIN 923467570 · Headquarters: La Crosse, WI, US · Human Services · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  13. Mater Filius Milwaukee

    EIN 990841213 · Headquarters: Milwaukee, WI, US · Human Services · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  14. Material Girls Quilt Club

    EIN 451347269 · Headquarters: Nekoosa, WI, US · Arts, Culture & Humanities · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  15. Mathematics Institute of Wisconsin Co Kathryn Leverenz

    EIN 464161191 · Headquarters: OCONOMOWOC, WI, USA · Education · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  16. Matheson Memorial Library Foundation Inc

    EIN 391693710 · Headquarters: ELKHORN, WI, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  17. Mathilde U and Albert Elser Foundation

    EIN 396044395 · Headquarters: Milwaukee, WI, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  18. Matilda Wards Youth Empowerment Association

    EIN 721548060 · Headquarters: MILWAUKEE, WI, US · Youth Development · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  19. Matrix Foundation

    EIN 391999556 · Headquarters: MEQUON, WI, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  20. Matrix World Organization Inc

    EIN 462890684 · Headquarters: Green Bay, WI, US · Arts, Culture & Humanities · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  21. Matt and Loni Sisko Foundation Ltd

    EIN 464732268 · Headquarters: Eau Claire, WI, US · Human Services · Latest available filing year: 2017 · Primary form: IRS Form 990-N

  22. Matt Kolbe Memorial Foundation Inc

    EIN 863210119 · Headquarters: Chilton, WI, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  23. Matt Pagel Scholarship Fund

    EIN 020808645 · Headquarters: Oconto, WI, US · Education · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  24. Matt Schmidt Faith Foundation Inc

    EIN 812194703 · Headquarters: GREEN BAY, WI, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  25. Matt Schmidt Outdoors Ltd

    EIN 883506844 · Headquarters: Beloit, WI, US · Recreation & Sports · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  26. Matthew 20 28 Inc

    EIN 843163032 · Headquarters: Eau Claire, WI, US · Community Improvement & Capacity Building · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  27. Matthew 25 Limited

    EIN 391828161 · Headquarters: RACINE, WI, US · Crime & Legal Related · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  28. Matthew J Baumgartner Memorial High School Scholarship Foundation

    EIN 812800733 · Headquarters: ELK MOUND, WI, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  29. Matthews Lake Association Inc

    EIN 371567043 · Headquarters: Spooner, WI, US · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  30. Matthias Academy Corporation

    EIN 825324304 · Headquarters: Benet Lake, WI, USA · Human Services · Latest available filing year: 2024 · Primary form: IRS Form 990

  31. Mattoon Sno-runners

    EIN 933902177 · Headquarters: Antigo, WI, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  32. Mattoon Sportsmens Club

    EIN 391464767 · Headquarters: ELAND, WI, US · Unknown & Unclassified · Latest available filing year: 2008 · Primary form: IRS Form 990-N

  33. Mattys Matters Inc

    EIN 814475113 · Headquarters: NEW BERLIN, WI, US · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  34. Maude Francis Trust Uw Fbo Shriners Hospital

    EIN 436182679 · Headquarters: MILWAUKEE, WI, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  35. Maureen F Mengelt Memorial Fund

    EIN 462495449 · Headquarters: Sun Prairie, WI, US · Unknown & Unclassified · Latest available filing year: 2014 · Primary form: IRS Form 990-N

  36. Maurice & June Robinson Family Foundation Inc

    EIN 391831176 · Headquarters: DE PERE, WI, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  37. Mauston Area Ambulance Assn Inc

    EIN 391210787 · Headquarters: MAUSTON, WI, USA · Health Care · Latest available filing year: 2025 · Primary form: IRS Form 990

  38. Mauston Area Child Care Services Inc

    EIN 391336042 · Headquarters: MAUSTON, WI, USA · Human Services · Latest available filing year: 2017 · Primary form: IRS Form 990-EZ

  39. Mauston Area Swim Club

    EIN 391834213 · Headquarters: Mauston, WI, US · Recreation & Sports · Latest available filing year: 2007 · Primary form: IRS Form 990-N

  40. Mauston Area Youth Soccer Inc

    EIN 824454525 · Headquarters: Mauston, WI, US · Recreation & Sports · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  41. Mauston Education Association

    EIN 237086949 · Headquarters: MADISON, WI, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  42. Mauston High School Choir Boosters

    EIN 934216692 · Headquarters: Mauston, WI, US · Arts, Culture & Humanities · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  43. Mauston Wrestling Club Inc

    EIN 814398746 · Headquarters: MAUSTON, WI, USA · Community Improvement & Capacity Building · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  44. Mauston Youth Baseball Llc

    EIN 270540256 · Headquarters: MAUSTON, WI, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  45. Max Fund Inc

    EIN 391563191 · Headquarters: MEQUON, WI, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  46. Max H Janowsky Memorial Tuw

    EIN 426581648 · Headquarters: MILWAUKEE, WI, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2016 · Primary form: IRS Form 990-PF

  47. Max Joy Inc

    EIN 931559591 · Headquarters: Verona, WI, USA · Human Services · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  48. Maxcen Housing Society Inc Wisconsin Branch

    EIN 863261972 · Headquarters: Nenomonee Falls, WI, USA · Human Services · Latest available filing year: 2025 · Primary form: IRS Form 990

  49. Maximillian C Kolinski

    EIN 396035929 · Headquarters: MILWAUKEE, WI, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  50. Maxsan Foundation Co Jean-max and Sandra J Dermond

    EIN 206299515 · Headquarters: MILWAUKEE, WI, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  51. May Family Foundation Inc

    EIN 392006747 · Headquarters: MADISON, WI, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  52. May Luchsinger Trust Fbo Vets 020204

    EIN 396055723 · Headquarters: BELOIT, WI, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  53. May Nickell Rankin Fellowship Tr

    EIN 396033712 · Headquarters: MILWAUKEE, WI, USA · Community Improvement & Capacity Building · Latest available filing year: 2010 · Primary form: IRS Form 990-PF

  54. May Test Tr Fbo Midland University

    EIN 363495553 · Headquarters: MILWAUKEE, WI, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  55. Maya-maya First Inc

    EIN 274663564 · Headquarters: Appleton, WI, US · Education · Latest available filing year: 2016 · Primary form: IRS Form 990-N

  56. Mayan Hope

    EIN 200262208 · Headquarters: soldiers grove, WI, US · Human Services · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  57. Maydm Inc

    EIN 810991008 · Headquarters: MADISON, WI, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  58. Mayer Family Foundation Inc

    EIN 391912036 · Headquarters: MILWAUKEE, WI, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  59. Mayer Norman Tr Uwo 6857009700 R59770009

    EIN 346754431 · Headquarters: MILWAUKEE, WI, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2010 · Primary form: IRS Form 990-PF

  60. Mayfair Park Neighborhood Association Wauwatosa

    EIN 932280422 · Headquarters: Wauwatosa, WI, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  61. Mayflower Nursery of Green Bay Wis

    EIN 391169344 · Headquarters: GREEN BAY, WI, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  62. Mayflower Nursery School Endowment Foundation Inc

    EIN 391747084 · Headquarters: GREEN BAY, WI, US · Education · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  63. Maynard Schulgen Post 216 the American Legion Dept of Wisconsin

    EIN 391364381 · Headquarters: Lodi, WI, US · Public & Societal Benefit · Latest available filing year: 2018 · Primary form: IRS Form 990-N

  64. Mayo Clinic Health System

    EIN 390920634 · Headquarters: BARRON, WI, USA · Health Care · Latest available filing year: 2014 · Primary form: IRS Form 990

  65. Mayo Clinic Health System

    EIN 390980343 · Headquarters: BLOOMER, WI, USA · Health Care · Latest available filing year: 2014 · Primary form: IRS Form 990

  66. Mayo Clinic Health System

    EIN 391029430 · Headquarters: OSSEO, WI, USA · Health Care · Latest available filing year: 2014 · Primary form: IRS Form 990

  67. Mayo Clinic Health System - Eau Claire Clinic Inc

    EIN 391735831 · Headquarters: EAU CLAIRE, WI, USA · Health Care · Latest available filing year: 2014 · Primary form: IRS Form 990

  68. Mayo Clinic Health System-franciscan Healthcare Foundation Inc

    EIN 391186647 · Headquarters: LA CROSSE, WI, USA · Health Care · Latest available filing year: 2015 · Primary form: IRS Form 990

  69. Mayo Clinic Health System-franciscan Healthcare Foundation-sparta Inc

    EIN 391423234 · Headquarters: SPARTA, WI, USA · Health Care · Latest available filing year: 2014 · Primary form: IRS Form 990

  70. Mayo Clinic Health System-franciscan Healthcare Inc

    EIN 391411999 · Headquarters: LA CROSSE, WI, USA · Health Care · Latest available filing year: 2015 · Primary form: IRS Form 990

  71. Mayo Clinic Health System-home Health & Hospice Inc

    EIN 391491516 · Headquarters: EAU CLAIRE, WI, USA · Health Care · Latest available filing year: 2014 · Primary form: IRS Form 990

  72. Mayo Clinic Health System-red Cedar Inc

    EIN 510190875 · Headquarters: MENOMONIE, WI, USA · Health Care · Latest available filing year: 2014 · Primary form: IRS Form 990

  73. Mayo Clinic Health System-supportive Home Care Inc

    EIN 391686673 · Headquarters: EAU CLAIRE, WI, USA · Health Care · Latest available filing year: 2014 · Primary form: IRS Form 990

  74. Maysa (Affiliated) Inc

    EIN 391776625 · Headquarters: MADISON, WI, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  75. Maysville and Mason County Cemetery Perpetual

    EIN 616067026 · Headquarters: MILWAUKEE, WI, USA · Mutual & Membership Benefit · Latest available filing year: 2016 · Primary form: IRS Form 990

  76. Mayville Athletic Booster Club Inc

    EIN 391405074 · Headquarters: Mayville, WI, US · Education · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  77. Mayville Audubon Days Inc

    EIN 923379149 · Headquarters: Lomira, WI, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  78. Mayville Cares Inc

    EIN 990927647 · Headquarters: MAYVILLE, WI, US · Community Improvement & Capacity Building · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  79. Mayville Chamber of Commmerce Inc

    EIN 391591857 · Headquarters: MAYVILLE, WI, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  80. Mayville Education Association

    EIN 396099449 · Headquarters: MADISON, WI, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  81. Mayville Friends of Camp Inc

    EIN 932762523 · Headquarters: Lomira, WI, US · Education · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  82. Mayville Historical Society Inc

    EIN 396127522 · Headquarters: MAYVILLE, WI, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  83. Mayville Kickoff Club Inc

    EIN 452876750 · Headquarters: Mayville, WI, US · Education · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  84. Mayville Limestone School Museum Inc

    EIN 391402427 · Headquarters: MAYVILLE, WI, USA · Arts, Culture & Humanities · Latest available filing year: 2024 · Primary form: IRS Form 990

  85. Mayville Open Door Inc

    EIN 473191497 · Headquarters: Mayville, WI, USA · Human Services · Latest available filing year: 2024 · Primary form: IRS Form 990

  86. Mayville Rotary Scholarship Foundation Inc

    EIN 391299709 · Headquarters: MAYVILLE, WI, US · Community Improvement & Capacity Building · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  87. Mayville Senior Citizens Inc

    EIN 391342876 · Headquarters: MAYVILLE, WI, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  88. Mayville Summer Sting

    EIN 461697197 · Headquarters: Mayville, WI, US · Recreation & Sports · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  89. Mayville Youth Baseball Club

    EIN 332931675 · Headquarters: Mayville, WI, US · Education · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  90. Mayville Youth Football Inc

    EIN 392023718 · Headquarters: Brownsville, WI, US · Recreation & Sports · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  91. Mayville Youth Wrestling Team

    EIN 333030925 · Headquarters: Mayville, WI, US · Education · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  92. Mazo Pool Supporters

    EIN 932951537 · Headquarters: Black Earth, WI, US · Recreation & Sports · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  93. Mazomanie Barracudas Swim Booster Club Inc

    EIN 882894371 · Headquarters: Mazomanie, WI, US · Recreation & Sports · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  94. Mazomanie Charitable Alliance

    EIN 462173461 · Headquarters: Mazomanie, WI, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2024 · Primary form: IRS Form 990

  95. Mazomanie Grounds Association Inc

    EIN 391929028 · Headquarters: Middleton, WI, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  96. Mazomanie Historic Art Center

    EIN 200857133 · Headquarters: Verona, WI, US · Arts, Culture & Humanities · Latest available filing year: 2008 · Primary form: IRS Form 990-N

  97. Mazomanie Historical Society Inc

    EIN 396126573 · Headquarters: Mazomanie, WI, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  98. Mazomanie Music Conservancy

    EIN 264663033 · Headquarters: MAZOMANIE, WI, US · Arts, Culture & Humanities · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  99. Mazomanie Wild West Days Assoc Inc

    EIN 300827051 · Headquarters: MAZOMANIE, WI, USA · Public & Societal Benefit · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  100. Mazur Polish Dancers of Milwaukee Inc

    EIN 396069652 · Headquarters: WAUKESHA, WI, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

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