Unknown & Unclassified nonprofits in Wisconsin

Unknown & Unclassified nonprofits in Wisconsin. Browse 13,737 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. Marshfield Area Habitat for Humanity Inc

    EIN 391816221 · Headquarters: MARSHFIELD, WI, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  2. Marshfield Area Kennel Club

    EIN 391641831 · Headquarters: Arpin, WI, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  3. Marshfield Area Rea

    EIN 271705977 · Headquarters: Marshfield, WI, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  4. Marshfield Area Ymca Inc

    EIN 391557086 · Headquarters: Marshfield, WI, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  5. Marshfield Auxiliary Personnel Association

    EIN 383744161 · Headquarters: MADISON, WI, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  6. Marshfield Baseball Association Inc

    EIN 391608992 · Headquarters: Marshfield, WI, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  7. Marshfield Curling Club Inc

    EIN 391246482 · Headquarters: Marshfield, WI, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  8. Marshfield Public Library Foundation Inc

    EIN 391570731 · Headquarters: MARSHFIELD, WI, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  9. Marshfield Rotary Foundation Inc

    EIN 391617353 · Headquarters: MARSHFIELD, WI, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  10. Marshfield Senior Citizens Council

    EIN 391624188 · Headquarters: Marshfield, WI, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  11. Marshfield Teachers Association

    EIN 237098700 · Headquarters: MADISON, WI, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  12. Marshfield Youth Hockey Association Inc

    EIN 930837268 · Headquarters: MARSHFIELD, WI, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  13. Marth Foundation Ltd

    EIN 391410550 · Headquarters: MARATHON, WI, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  14. Martin Club

    EIN 391482450 · Headquarters: Brookfield, WI, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  15. Martin Mary Elizabeth Scholarship

    EIN 486104170 · Headquarters: MILWAUKEE, WI, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  16. Mary B Biddle Tr Uw

    EIN 616139469 · Headquarters: MILWAUKEE, WI, USA · Unknown & Unclassified · Latest available filing year: 2018 · Primary form: IRS Form 990-PF

  17. Mary Lake Montessori Inc

    EIN 391579294 · Headquarters: WAUNAKEE, WI, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  18. Mary Louise Osborne Tr Uw

    EIN 616220208 · Headquarters: MILWAUKEE, WI, USA · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-PF

  19. Mary Moorehead Charitable Tuw 4920000363

    EIN 396534099 · Headquarters: WAUKESHA, WI, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  20. Mary Pauly Lacy Foundation Inc

    EIN 391744801 · Headquarters: MILWAUKEE, WI, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  21. Mary Sumerlin Hippen Education Fdn

    EIN 956228286 · Headquarters: MILWAUKEE, WI, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  22. Mary W Stremmer Educational Trust Fund

    EIN 391706432 · Headquarters: Marshall, WI, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  23. Mary W Stremmer Educational Trust Fund

    EIN 391706433 · Headquarters: Marshall, WI, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  24. Maryhill Manor Inc

    EIN 391501353 · Headquarters: NIAGARA, WI, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  25. Maryland Academy of Family Physicians

    EIN 521317156 · Headquarters: THIENSVILLE, WI, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  26. Marytown Athletic Club

    EIN 396075815 · Headquarters: New Holstein, WI, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  27. Mascoutin Ladies Golf League

    EIN 991304052 · Headquarters: Ripon, WI, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  28. Mason Charitable Trust

    EIN 510171871 · Headquarters: MILWAUKEE, WI, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  29. Mason Contractors Association of Milwaukee

    EIN 391189154 · Headquarters: WAUWATOSA, WI, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  30. Masonic Angel Fondation Inc

    EIN 264392930 · Headquarters: WAUWATOSA, WI, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  31. Masonic Center for Health and Rehab Inc

    EIN 391506910 · Headquarters: DOUSMAN, WI, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  32. Master Builders Association of Wisconsin Inc

    EIN 390455615 · Headquarters: Wauwatosa, WI, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  33. Master Lock Retirees

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

  34. Master Singers of Milwaukee Inc

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

  35. Matheson Memorial Library Foundation Inc

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

  36. 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

  37. 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

  38. Mattoon Sno-runners

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

  39. Mattoon Sportsmens Club

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

  40. 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

  41. 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

  42. Mauston Education Association

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

  43. Mauston Youth Baseball Llc

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

  44. Max Fund Inc

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

  45. Maximillian C Kolinski

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

  46. 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

  47. 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

  48. Maydm Inc

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

  49. Mayfair Park Neighborhood Association Wauwatosa

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

  50. 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

  51. Maysa (Affiliated) Inc

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

  52. Mayville Audubon Days Inc

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

  53. Mayville Chamber of Commmerce Inc

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

  54. Mayville Education Association

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

  55. Mayville Historical Society Inc

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

  56. Mayville Senior Citizens Inc

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

  57. Mazomanie Grounds Association Inc

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

  58. Mazomanie Historical Society Inc

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

  59. 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

  60. Mc Sailing Association

    EIN 237191237 · Headquarters: MUKWONAGO, WI, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  61. Mcfarland Chamber of Commerce

    EIN 391784424 · Headquarters: MCFARLAND, WI, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  62. McFarland Federation of Teachers

    EIN 320266112 · Headquarters: MCFARLAND, WI, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  63. Mcfarland Historical Society Inc

    EIN 237034114 · Headquarters: MC FARLAND, WI, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  64. Mcfarland Hockey Boosters Inc

    EIN 391606568 · Headquarters: MADISON, WI, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  65. Mcfarland Lutheran Church

    EIN 391135735 · Headquarters: MCFARLAND, WI, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-T

  66. McFarland Spartan Sharks Inc

    EIN 391417735 · Headquarters: McFarland, WI, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  67. Mcfarland Youth Football Inc

    EIN 391589912 · Headquarters: McFarland, WI, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  68. Mcfarland Youth Hockey Assn Inc

    EIN 391376985 · Headquarters: MCFARLAND, WI, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  69. Mcfarland Youth Spirit Inc

    EIN 020809309 · Headquarters: McFarland, WI, US · Unknown & Unclassified · Latest available filing year: 2008 · Primary form: IRS Form 990-N

  70. Mcginley Fund Twi

    EIN 956323747 · Headquarters: MILWAUKEE, WI, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  71. MCHC (Muslim Community and Health Center of Wisconsin)

    EIN 452385629 · Headquarters: Milwaukee, WI, United States · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  72. Mchenry County Dental Society

    EIN 391752154 · Headquarters: KENOSHA, WI, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  73. Mchenry County Oral Health Advocates Inc

    EIN 364131256 · Headquarters: KENOSHA, WI, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  74. Mckinley Mixed Inc

    EIN 861599691 · Headquarters: Wauwatosa, WI, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  75. Mckinley Pto

    EIN 412166837 · Headquarters: Stevens Point, WI, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  76. Mclaurin House

    EIN 474847327 · Headquarters: MILWAUKEE, WI, US · Unknown & Unclassified · Latest available filing year: 2018 · Primary form: IRS Form 990-N

  77. Mcp Charitable Foundation

    EIN 391419756 · Headquarters: WISCONSIN RAPIDS, WI, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  78. Mcw Military Medical Student Association

    EIN 833469223 · Headquarters: Wauwatosa, WI, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  79. Mead Public Library Foundation Inc

    EIN 391670997 · Headquarters: SHEBOYGAN, WI, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  80. Mead Witter Foundation Inc

    EIN 396040071 · Headquarters: WISCONSIN RAPIDS, WI, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  81. Meals Matter Corp

    EIN 333751516 · Headquarters: Verona, WI, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  82. Meals on Wheels of Sheboygan County Inc

    EIN 391238290 · Headquarters: SHEBOYGAN, WI, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  83. Meals on Wheels of Stevens Point

    EIN 391364268 · Headquarters: STEVENS POINT, WI, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  84. Meat & Allied Food Workers Health & Welfare Fund

    EIN 396091428 · Headquarters: Milwaukee, WI, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  85. Meat and Allied Food Workers Severance Pay Trust Fund 2

    EIN 396142194 · Headquarters: Kenosha, WI, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  86. Mechanical Conctractors Se Inc

    EIN 391542117 · Headquarters: KENOSHA, WI, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  87. Mechanical Contractors Association Northwest Wisconsin Industry Fund

    EIN 391404317 · Headquarters: APPLETON, WI, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  88. Mechanical Contractors Association of North Central Wisconsin Inc

    EIN 391021834 · Headquarters: APPLETON, WI, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  89. Mechanical Contractors Association of North Central Wisconsin Industry Fund

    EIN 391606450 · Headquarters: APPLETON, WI, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  90. Mechanical Contractors Association of Northwest Wisconsin Sheet Metal

    EIN 391752834 · Headquarters: Appleton, WI, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  91. Mechanical Contractors Association of Wisconsin Inc

    EIN 396062015 · Headquarters: APPLETON, WI, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  92. Mechanical Contractors Development Fund Inc

    EIN 391029703 · Headquarters: WAUWATOSA, WI, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  93. Medford Area Youth Hockey Association Inc

    EIN 391496089 · Headquarters: Medford, WI, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  94. Medford Basketball Booster Club Inc

    EIN 203755565 · Headquarters: Medford, WI, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  95. Medford Education Association

    EIN 237086951 · Headquarters: MADISON, WI, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  96. Medford Morning Rotary International

    EIN 392037202 · Headquarters: MEDFORD, WI, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  97. Medical Center Foundation of Hartford

    EIN 391375380 · Headquarters: Hartford, WI, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  98. Medical College of Wisconsin

    EIN 391341366 · Headquarters: Milwaukee, WI, United States · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  99. Medical College of Wisconsin- MARQUETTE MEDICAL ALUMNI ASSOC

    EIN 391391593 · Headquarters: MILWAUKEE, WI, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  100. Medical Education Institute Inc

    EIN 391739731 · Headquarters: MADISON, WI, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

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