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. Silver Lake Yacht Club Inc 5602 Peters Dr

    EIN 391655136 · Headquarters: WEST BEND, WI, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  2. Silver M Club Inc

    EIN 391421043 · Headquarters: Merrill, WI, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  3. Silver Saddles Ltd

    EIN 753205045 · Headquarters: Lake Geneva, WI, US · Unknown & Unclassified · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  4. Silver Spring Corporate Park Association Inc

    EIN 391895885 · Headquarters: MENOMONEE FALLS, WI, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  5. Silver Star Brands Foundation Inc

    EIN 396075744 · Headquarters: OSHKOSH, WI, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  6. Simeanna Apartments Inc

    EIN 237148097 · Headquarters: OSHKOSH, WI, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  7. Simeanna Iii Inc

    EIN 391270056 · Headquarters: OSHKOSH, WI, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  8. Simeanna South Inc

    EIN 391238670 · Headquarters: OSHKOSH, WI, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  9. Simon of Cyrene Tabernacle No Xv

    EIN 900811700 · Headquarters: OSHKOSH, WI, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  10. Sinissippi Trail Hawks Inc

    EIN 237439037 · Headquarters: Hustisford, WI, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  11. Sinsinawa Dominicans Inc

    EIN 390816854 · Headquarters: SINSINAWA, WI, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-T

  12. Sinsinawa Housing Inc

    EIN 391950325 · Headquarters: SINSINAWA, WI, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  13. Sinsinawa Nursing Inc

    EIN 391958028 · Headquarters: WATERTOWN, WI, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  14. Siren Chamber of Commerce Inc

    EIN 391463454 · Headquarters: SIREN, WI, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  15. Siren Education Association

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

  16. Siren Education Support Professionals

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

  17. Siren Senior Center Inc

    EIN 391265162 · Headquarters: Siren, WI, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  18. Siron Foundation Co Jeffrey Sartell

    EIN 396508464 · Headquarters: Whitewater, WI, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  19. Sister Claire Marie Wick-triniteam Foundation Inc

    EIN 391577314 · Headquarters: Eau Claire, WI, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  20. Sitzmark Ski Club of Milwaukee Inc

    EIN 396095770 · Headquarters: Wauwatosa, WI, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  21. Sixteenth Street Community Health Centers

    EIN 391180475 · Headquarters: Milwaukee, WI, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  22. Skaalen Retirement Services Inc

    EIN 813945492 · Headquarters: STOUGHTON, WI, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  23. Skaalen Village Inc

    EIN 020663908 · Headquarters: STOUGHTON, WI, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  24. Skaalendal Inc

    EIN 391840749 · Headquarters: STOUGHTON, WI, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  25. Skeeter Ice Boat Club

    EIN 366117648 · Headquarters: Williams Bay, WI, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  26. Skeets Millard Valley School Inc

    EIN 391303856 · Headquarters: Boscobel, WI, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  27. Skiing Wisconsin Inc

    EIN 461028169 · Headquarters: SLINGER, WI, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  28. Skilled Wisconsin Inc

    EIN 473590490 · Headquarters: KAUKAUNA, WI, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  29. Skonewood Inc

    EIN 930711350 · Headquarters: SIREN, WI, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  30. Skylane Llc

    EIN 472045569 · Headquarters: Eau Claire, WI, US · Unknown & Unclassified · Latest available filing year: 2013 · Primary form: IRS Form 990-N

  31. Slinger Economic Development Corp

    EIN 391685460 · Headquarters: Slinger, WI, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  32. Slinger Education Association

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

  33. Slinger Kiwanis Club

    EIN 834107072 · Headquarters: Slinger, WI, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  34. Slovak Catholic Sokol 93

    EIN 237523097 · Headquarters: South Milwaukee, WI, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  35. Slovene National Benefit Society

    EIN 237524372 · Headquarters: Junction City, WI, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  36. Slovene National Benefit Society

    EIN 237524584 · Headquarters: Greenfield, WI, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  37. Smile for a While Bundles Inc

    EIN 851047423 · Headquarters: Fredonia, WI, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  38. Smiling for Samuel

    EIN 843837860 · Headquarters: NEILLSVILLE, WI, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  39. Smith Council No 10

    EIN 390053510 · Headquarters: sparta, WI, US · Unknown & Unclassified · Latest available filing year: 2017 · Primary form: IRS Form 990-N

  40. Smith Russell & Vera Private Fdn Xxxxxx4172

    EIN 391744162 · Headquarters: LA CROSSE, WI, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  41. Smocking Arts Guild of America Inc

    EIN 581769021 · Headquarters: Mequon, WI, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  42. Sna-wi Chapter 12

    EIN 475307671 · Headquarters: Friendship, WI, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  43. Snap-on Recreation Club

    EIN 396060728 · Headquarters: KENOSHA, WI, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  44. Snf Jedinstvo Lodge 99

    EIN 611612933 · Headquarters: New Berlin, WI, US · Unknown & Unclassified · Latest available filing year: 2012 · Primary form: IRS Form 990-N

  45. Snitz Club Inc

    EIN 510192914 · Headquarters: Oshkosh, WI, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  46. Sno Barons Snowmobile Association Inc

    EIN 510204423 · Headquarters: PRINCETON, WI, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  47. Sno Rovers Snowmobile Club Inc

    EIN 391235691 · Headquarters: Wild Rose, WI, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  48. Sno-drifters Inc

    EIN 391340758 · Headquarters: ANTIGO, WI, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  49. Sno-kats of Beaver Dam Inc

    EIN 391134538 · Headquarters: Beaver Dam, WI, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  50. Sno-lords Inc Caledonia

    EIN 396282169 · Headquarters: Caledonia, WI, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  51. Sno-mads-hayward Area Snowmobile Club Inc

    EIN 510180926 · Headquarters: Hayward, WI, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  52. Sno-n-go Club Inc

    EIN 391603276 · Headquarters: waterford, WI, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  53. Snobirds Snomobile Club of Brown Co Unty

    EIN 391712002 · Headquarters: Suamico, WI, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  54. Snoopy Sno-goers Inc

    EIN 237448927 · Headquarters: LANCASTER, WI, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  55. Snow and Ice Management Association Inc

    EIN 251797097 · Headquarters: MEQUON, WI, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  56. Snowdrifters Snowmobile Club Inc

    EIN 237228291 · Headquarters: Markesan, WI, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-EZ

  57. Snowmobile Club of Pickett Inc

    EIN 391710924 · Headquarters: Oshkosh, WI, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  58. Snowmobile Clubs Grooming Assoc Inc

    EIN 391657468 · Headquarters: MEDFORD, WI, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  59. Snowmobile Trails of Monroe County

    EIN 391368226 · Headquarters: WARRENS, WI, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  60. So Dak Childrens Society Tua

    EIN 466050089 · Headquarters: MILWAUKEE, WI, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-PF

  61. Soccer Assoc for Youth

    EIN 391402467 · Headquarters: GREEN BAY, WI, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  62. Soccer Assoc for Youth

    EIN 391438656 · Headquarters: Sturgoen Bay, WI, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  63. Soccer Assoc for Youth

    EIN 391705198 · Headquarters: Washington Island, WI, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  64. Soccer Assoc for Youth

    EIN 391804621 · Headquarters: Kewaunee, WI, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  65. Soccer Assoc for Youth

    EIN 391983008 · Headquarters: Shawano, WI, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  66. Social No 245 F & a M

    EIN 237532550 · Headquarters: Dousman, WI, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  67. Society for Ambulatory Anesthesia

    EIN 541355440 · Headquarters: MILWAUKEE, WI, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  68. Society for Education in Anesthesia

    EIN 911237012 · Headquarters: MILWAUKEE, WI, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  69. Society for Faith & Children's Education Inc

    EIN 270144867 · Headquarters: SUAMICO, WI, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  70. Society for Immunotherapy of Cancer Inc

    EIN 391554806 · Headquarters: MILWAUKEE, WI, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  71. Society for Invertebrate Pathology

    EIN 526076168 · Headquarters: VERONA, WI, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  72. Society for Mucosal Immunology Inc

    EIN 541419447 · Headquarters: MENOMONEE FALLS, WI, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  73. Society for Preservation & Encourmt of Barbershop Quartet Singing Amer

    EIN 237041016 · Headquarters: Superior, WI, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  74. Society for Preservation & Encourmt of Barbershop Quartet Singing Amer

    EIN 391618877 · Headquarters: Lac du Flambeau, WI, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  75. Society for Preservation & Encourmt of Barbershop Quartet Singing Amer

    EIN 396055005 · Headquarters: Kenosha, WI, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  76. Society for Preservation & Encourmt of Barbershop Quartet Singing Amer

    EIN 396094624 · Headquarters: Brookfield, WI, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  77. Society for Preservation & Encourmt of Barbershop Quartet Singing Amer

    EIN 396130643 · Headquarters: Frederic, WI, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

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

    EIN 205774734 · Headquarters: BROOKFIELD, WI, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  79. 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

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

    EIN 237066974 · Headquarters: Colfax, WI, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

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

    EIN 237442892 · Headquarters: Fontana, WI, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

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

    EIN 390768110 · Headquarters: La Crosse, WI, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

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

    EIN 391092895 · Headquarters: Manitowoc, WI, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

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

    EIN 391632860 · Headquarters: GREENDALE, WI, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

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

    EIN 396077302 · Headquarters: MERRILL, WI, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

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

    EIN 396077303 · Headquarters: Stevens Point, WI, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

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

    EIN 396077470 · Headquarters: Little Chute, WI, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

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

    EIN 396086911 · Headquarters: RACINE WI, WI, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

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

    EIN 396089130 · Headquarters: New Berlin, WI, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

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

    EIN 396094618 · Headquarters: Green Bay, WI, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  91. Society for Preservation Encrgmnt of Barbershop Quartet Singing Amer

    EIN 900038649 · Headquarters: Sheboygan Falls, WI, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  92. Society for Reproductive Investigation Inc

    EIN 952293816 · Headquarters: MILWAUKEE, WI, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  93. Society for Technology in Anesthesia

    EIN 330355176 · Headquarters: MILWAUKEE, WI, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  94. 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

  95. Society of American Foresters

    EIN 521273261 · Headquarters: Butternut, WI, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  96. Society of Automotive Hstrians-wi Chapt Inckrause Pblctn

    EIN 391359576 · Headquarters: Neenah, WI, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  97. Society of Behavioral Medicine Inc

    EIN 132984912 · Headquarters: MILWAUKEE, WI, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  98. Society of Broadcast Engineers Chapter 112

    EIN 411658660 · Headquarters: Eau Claire, WI, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  99. 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

  100. Society of Cosmetic Chemists Tc

    EIN 222713742 · Headquarters: NEW RICHMOND, WI, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

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