Environment nonprofits in Wisconsin

Environment nonprofits in Wisconsin. Browse 1,084 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. Seaborne Enviromental Action Vast Area Cleanup Inc

    EIN 464020221 · Headquarters: Neenah, WI, US · Environment · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  2. Second Chance for a Better Tomorrow

    EIN 812650728 · Headquarters: Milwaukee, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  3. Seeley Hills Club Inc

    EIN 931775412 · Headquarters: Hayward, WI, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  4. Seno Krlt Conservancy Inc

    EIN 391765195 · Headquarters: BURLINGTON, WI, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990

  5. Seven Rivers Soil Cooperative Inc

    EIN 991215088 · Headquarters: Reedsville, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  6. Seventh Generation Energy Systems Inc

    EIN 450487246 · Headquarters: MADISON, WI, USA · Environment · Latest available filing year: 2010 · Primary form: IRS Form 990

  7. Seventhwave Inc

    EIN 391656021 · Headquarters: MADISON, WI, USA · Environment · Latest available filing year: 2018 · Primary form: IRS Form 990

  8. Shadows on the Wolf Inc

    EIN 391723093 · Headquarters: SHIOCTON, WI, USA · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990

  9. Shawano Area Waterway Management Inc

    EIN 391495202 · Headquarters: SHAWANO, WI, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990

  10. Shawano County Friends of the Mountain Bay Trail

    EIN 844494797 · Headquarters: Shawano, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  11. Shishebogama & Gunlock Lakes Association Inc

    EIN 800505859 · Headquarters: Minocqua, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  12. Shorewood Hills Garden Club

    EIN 934843194 · Headquarters: Madison, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  13. Shoto Conservation Club of Wisconsin Inc

    EIN 392009881 · Headquarters: MANITOWOC, WI, USA · Environment · Latest available filing year: 2018 · Primary form: IRS Form 990-EZ

  14. Show Inc

    EIN 821070395 · Headquarters: Mt Pleasant, WI, US · Environment · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  15. Shullsburg Conservation Club Inc

    EIN 611627349 · Headquarters: SHULLSBURG, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  16. Silver Lake Association

    EIN 010606618 · Headquarters: Cumberland, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  17. Silver Lake Preservation Association Inc

    EIN 461315497 · Headquarters: Laona, WI, USA · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  18. Slipstream Group Inc

    EIN 391356152 · Headquarters: MADISON, WI, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990

  19. Smart Business Forum

    EIN 611529210 · Headquarters: WHITEFISH BAY, WI, USA · Environment · Latest available filing year: 2012 · Primary form: IRS Form 990-EZ

  20. Smoky Lake Preservation Association

    EIN 815012693 · Headquarters: Phelps, WI, US · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  21. Snipe Lake Association

    EIN 200892415 · Headquarters: Eagle River, WI, US · Environment · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  22. Sole Save Our Lake Environment Inc

    EIN 205629629 · Headquarters: Madison, WI, US · Environment · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  23. Soo Lake United Association Inc

    EIN 263311789 · Headquarters: PHILLIPS, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  24. South Adams County Road Runners Inc

    EIN 821981273 · Headquarters: ADAMS, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  25. South Fork River Watershed Association

    EIN 201384006 · Headquarters: Park Falls, WI, US · Environment · Latest available filing year: 2011 · Primary form: IRS Form 990-N

  26. South Shore Park Watch

    EIN 391909740 · Headquarters: Milwaukee, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  27. Southeast Fox River Partnership

    EIN 202101174 · Headquarters: Oconomowoc, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  28. Southeast Wisconsin Land Conservancy

    EIN 850542678 · Headquarters: Waterville, WI, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990

  29. Southeast Wisconsin Master Gardeners Inc

    EIN 391802973 · Headquarters: Milwaukee, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  30. Southeastern Wisconsin Invasive Species Consortium Inc

    EIN 271893276 · Headquarters: Milwaukee, WI, USA · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990

  31. Southeastern Wisconsin Watersheds Trust Inc

    EIN 272718480 · Headquarters: MILWAUKEE, WI, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990

  32. Southern Kettle Moraine Horse Trails Association

    EIN 991297561 · Headquarters: Eagle, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  33. Southern Wisconsin Bird Alliance Inc

    EIN 391393389 · Headquarters: MADISON, WI, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990

  34. Southern Wisconsin Land Conservancy

    EIN 824936924 · Headquarters: BRODHEAD, WI, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990

  35. Southwest Badger Resource Conservation & Development Council

    EIN 391759169 · Headquarters: SPRING GREEN, WI, USA · Environment · Latest available filing year: 2020 · Primary form: IRS Form 990-EZ

  36. Spider Chain of Lakes Association

    EIN 391480182 · Headquarters: HAYWARD, WI, USA · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990

  37. Spirit Lakes Improvement Association Inc

    EIN 391713450 · Headquarters: Rib Lake, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  38. Spirit of Door County Inc

    EIN 843023815 · Headquarters: Sturgeon Bay, WI, US · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  39. Spiritriver Conservancy Inc

    EIN 882599321 · Headquarters: FRANKLIN, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  40. Sporting Heritage Foundation Inc

    EIN 201860960 · Headquarters: Burlington, WI, US · Environment · Latest available filing year: 2007 · Primary form: IRS Form 990-N

  41. Spread Eagle Chain of Lakes Inc C/o Dana Colenso

    EIN 391526599 · Headquarters: FLORENCE, WI, USA · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  42. Squash Lake Association

    EIN 710991586 · Headquarters: Rhinelander, WI, US · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  43. St Croix Citizens Uniting for Responsible Environmental Stewards

    EIN 332009539 · Headquarters: Hudson, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  44. St Croix Headwaters Foundation

    EIN 854026091 · Headquarters: Solon Springs, WI, US · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  45. Stan Plis Sportsmans League

    EIN 391829986 · Headquarters: Wisconsin Rapids, WI, US · Environment · Latest available filing year: 2011 · Primary form: IRS Form 990-N

  46. Standing Cedars Community Land Conservancy Inc

    EIN 391801006 · Headquarters: Osceola, WI, USA · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990

  47. Star Lakes-little Star Lakes

    EIN 205558001 · Headquarters: MENOMONEE FALLS, WI, USA · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  48. Star Prairie Land Preservation Trust Inc

    EIN 412049023 · Headquarters: STAR PRAIRIE, WI, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990

  49. Stewards Draw Inc

    EIN 261599436 · Headquarters: Bayfield, WI, US · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  50. Stewards of the Dells of the Wisconsin River Inc

    EIN 262726661 · Headquarters: Wisconsin Dells, WI, US · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  51. Stockbridge Harbor Fishing Club Inc

    EIN 352932813 · Headquarters: STOCKBRIDGE, WI, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  52. Stop Global Warming Foundation Inc

    EIN 475287682 · Headquarters: Madison, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  53. Stormy Lake Association Inc

    EIN 391863868 · Headquarters: Conover, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  54. Stratton Lake Property Owners Association Inc

    EIN 203908936 · Headquarters: Appleton, WI, US · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  55. Summit Lake Association

    EIN 800448890 · Headquarters: Summit Lake, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  56. Sun Prairie Community Garden Organization Inc

    EIN 611700907 · Headquarters: Sun Prairie, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  57. Sunset Lake Association Inc

    EIN 320541601 · Headquarters: EAGLE RIVER, WI, USA · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  58. Sunset Lake Association of Portage County Inc

    EIN 921861338 · Headquarters: Amherst Junction, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  59. Superior Community Gardens Association

    EIN 822880172 · Headquarters: Superior, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  60. Sustain Dane Inc

    EIN 431953180 · Headquarters: MADISON, WI, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990

  61. Sustain Door Inc

    EIN 262164939 · Headquarters: Sturgeon Bay, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  62. Sustain Fond Du Lac

    EIN 843483930 · Headquarters: FOND DU LAC, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  63. Sustainable Business Council Corp

    EIN 993656641 · Headquarters: Eagle, WI, US · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  64. Sustainable Operations and Recycling Inc

    EIN 463535685 · Headquarters: WISCONSIN RAPIDS, WI, USA · Environment · Latest available filing year: 2021 · Primary form: IRS Form 990-PF

  65. Swamplovers Foundation Inc

    EIN 203394136 · Headquarters: CROSS PLAINS, WI, USA · Environment · Latest available filing year: 2020 · Primary form: IRS Form 990-PF

  66. Swan Lake Association Inc

    EIN 391908134 · Headquarters: Portage, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  67. T-oats for Equine Charity Incorporated

    EIN 900599214 · Headquarters: Milwaukee, WI, US · Environment · Latest available filing year: 2014 · Primary form: IRS Form 990-N

  68. Tabor Lake Association Incorporated

    EIN 922581544 · Headquarters: Danbury, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  69. Tainter Menomin Lake Improvement Association

    EIN 391692106 · Headquarters: Menomonie, WI, US · Environment · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  70. Taliesin Preservation Inc

    EIN 391681988 · Headquarters: SPRING GREEN, WI, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990

  71. Tall Pines Conservancy

    EIN 391966972 · Headquarters: NASHOTAH, WI, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990

  72. Teal Lost Land and Ghost Lakes Improvement Association Inc

    EIN 916504972 · Headquarters: HAYWARD, WI, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  73. Teens Take on Climate Inc

    EIN 881881315 · Headquarters: WAUKESHA, WI, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990

  74. The American Peony Society Inc C/o Menn Law Firm

    EIN 540567098 · Headquarters: CHILTON, WI, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  75. The Anvil Lake Association Incorporated

    EIN 391823406 · Headquarters: Eagle River, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  76. The Bus for Outdoor Access and Teaching

    EIN 824605180 · Headquarters: MILWAUKEE, WI, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990

  77. The Conservation and Beautification Society of Greater Lake Como Inc

    EIN 364284356 · Headquarters: Lake Geneva, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  78. The Federation of Environmental Technologists Inc

    EIN 391480123 · Headquarters: WAUKESHA, WI, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990

  79. The Friends of the Broughton

    EIN 262122731 · Headquarters: ELKHART LAKE, WI, USA · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990

  80. The Limnological Institute Ltd

    EIN 391981720 · Headquarters: La Crosse, WI, US · Environment · Latest available filing year: 2013 · Primary form: IRS Form 990-N

  81. The Natural Step Monona Ltd

    EIN 260683020 · Headquarters: MONONA, WI, US · Environment · Latest available filing year: 2015 · Primary form: IRS Form 990-N

  82. The Prairie Enthusiasts Trust

    EIN 261963012 · Headquarters: VIROQUA, WI, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990

  83. The River Alliance of Wisconsin Inc

    EIN 391792143 · Headquarters: MADISON, WI, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990

  84. The Savanna Oak Foundation

    EIN 391980507 · Headquarters: MADISON, WI, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  85. The Wisconsin Natural Food Associates Inc

    EIN 391256664 · Headquarters: Poynette, WI, US · Environment · Latest available filing year: 2016 · Primary form: IRS Form 990-N

  86. Theatre in the Woods Limited

    EIN 391738752 · Headquarters: SHELL LAKE, WI, US · Environment · Latest available filing year: 2018 · Primary form: IRS Form 990-N

  87. Three Ecos Foundation Inc

    EIN 921422276 · Headquarters: BLACK EARTH, WI, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  88. Three Lakes Fish & Wildlife Improvement Assoc

    EIN 391687970 · Headquarters: THREE LAKES, WI, US · Environment · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  89. Three Lakes Waterfront Association

    EIN 237303472 · Headquarters: Three Lakes, WI, USA · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  90. Thunder Island Eagle Area Lakes Association Ltd

    EIN 272571595 · Headquarters: CRIVITZ, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  91. Tiger Cat Flowage Lake Association Inc

    EIN 822972447 · Headquarters: Hayward, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  92. Tilleda Sno-riders Inc

    EIN 731720315 · Headquarters: GRESHAM, WI, US · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  93. Timbrlife 2 0 Inc

    EIN 851040615 · Headquarters: Winneconne, WI, US · Environment · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  94. Tippesaukee Reserve Inc

    EIN 923921395 · Headquarters: Blue River, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  95. Tirimbina Rainforest Fund Inc

    EIN 391807642 · Headquarters: Milwaukee, WI, US · Environment · Latest available filing year: 2010 · Primary form: IRS Form 990-N

  96. Tomorrow River Valley Conservation Club Inc

    EIN 832289185 · Headquarters: AMHERST, WI, USA · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  97. Towanda Lake Association Incorporated

    EIN 813198252 · Headquarters: Woodruff, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  98. Town & Country Rc&d

    EIN 010777210 · Headquarters: JEFFERSON, WI, USA · Environment · Latest available filing year: 2012 · Primary form: IRS Form 990-EZ

  99. Town and Country Garden Club

    EIN 237101587 · Headquarters: Sheboygan Falls, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  100. Trade Lake Property Owners Association

    EIN 332363896 · Headquarters: Frederic, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

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