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. Lafayette Ag Stewardship Alliance Inc

    EIN 820864252 · Headquarters: South Wayne, WI, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  2. Lake Arbutus Association

    EIN 392037374 · Headquarters: MERRILLAN, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  3. Lake Association Buckhorn and Emerald Ltd

    EIN 821453970 · Headquarters: MERRILLAN, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  4. Lake Association of Oneida Lake Inc

    EIN 263432592 · Headquarters: HARSHAW, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  5. Lake Beulah Protective and Improvement Association

    EIN 300125230 · Headquarters: EAST TROY, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  6. Lake Como Lake Committee

    EIN 391454655 · Headquarters: Lake Geneva, WI, US · Environment · Latest available filing year: 2016 · Primary form: IRS Form 990-N

  7. Lake Eau Galle Association Inc

    EIN 880570136 · Headquarters: Eau Galle, WI, USA · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  8. Lake Five Advancement Association

    EIN 992452276 · Headquarters: Colgate, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  9. Lake Geneva Beautification Committee Inc

    EIN 262363045 · Headquarters: Lake Geneva, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  10. Lake Geneva Garden Club Foundation Inc

    EIN 396095113 · Headquarters: LAKE GENEVA, WI, USA · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990

  11. Lake George Lake Association

    EIN 061781265 · Headquarters: Rhinelander, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  12. Lake Hallie Lake Association Inc

    EIN 391801388 · Headquarters: Lake Hallie, WI, US · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  13. Lake Hayward Property Owners Association Inc

    EIN 463719976 · Headquarters: HAYWARD, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  14. Lake Julia Association Inc

    EIN 204291664 · Headquarters: Milwaukee, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  15. Lake Kathryn Association Inc

    EIN 831708181 · Headquarters: Medford, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  16. Lake Koshkonong Wetland Association Inc

    EIN 134256414 · Headquarters: Fort Atkinson, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  17. Lake Lucerne Advancement Association

    EIN 391455220 · Headquarters: CRANDON, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  18. Lake Metonga Association Inc

    EIN 391937478 · Headquarters: CRANDON, WI, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  19. Lake Minnesuing Association

    EIN 237104525 · Headquarters: Lake Nebagamon, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  20. Lake Nancy Protective Association

    EIN 208063828 · Headquarters: Minong, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  21. Lake Nokomis Concerned Citizens

    EIN 391405045 · Headquarters: Tomahawk, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  22. Lake Owen Association Inc

    EIN 460475814 · Headquarters: CABLE, WI, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990

  23. Lake Pepin Partners in Preservation

    EIN 461091753 · Headquarters: Stockholm, WI, US · Environment · Latest available filing year: 2018 · Primary form: IRS Form 990-N

  24. Lake Poygan Sportsmans Club

    EIN 391745943 · Headquarters: LARSEN, WI, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  25. Lake Puckaway Improvement Association Incorporation

    EIN 994419894 · Headquarters: Montello, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  26. Lake Sinissippi Association

    EIN 391453330 · Headquarters: Hustisford, WI, US · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  27. Lake States Resource Alliance Inc

    EIN 391679357 · Headquarters: Eagle River, WI, US · Environment · Latest available filing year: 2012 · Primary form: IRS Form 990-N

  28. Lake Superior Master Gardeners Association

    EIN 873413945 · Headquarters: Superior, WI, US · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  29. Lake Superior Not for Sale Inc

    EIN 881647619 · Headquarters: HERBSTER, WI, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  30. Lake Ucil Home Association

    EIN 871804845 · Headquarters: Pound, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  31. Lake Wandawega Improvement Association Inc

    EIN 141931672 · Headquarters: Elkhorn, WI, US · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  32. Lake Winnebago Quality Improvement Association

    EIN 455407802 · Headquarters: Fond du Lac, WI, US · Environment · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  33. Lake Winnetka and Sugar River Improvement Association Inc

    EIN 391994282 · Headquarters: Albany, WI, US · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  34. Lake Wisconsin Alliance

    EIN 471435171 · Headquarters: Poynette, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  35. Lakeland Community Gardens Inc

    EIN 862971694 · Headquarters: Woodruff, WI, US · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  36. Lakes & Pines Sno-trails Inc

    EIN 391935768 · Headquarters: SPOONER, WI, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  37. Lakes at Stake Wisconsin Inc

    EIN 933531595 · Headquarters: CEDARBURG, WI, USA · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  38. Lakewood Cross Country Ski Club Incorporated

    EIN 391335958 · Headquarters: LAKEWOOD, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  39. Land Conservation Association Inc

    EIN 333899896 · Headquarters: MADISON, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  40. Land Trust Network of Jefferson County Inc

    EIN 043804693 · Headquarters: WATERTOWN, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  41. Land Trust of Walworth County Inc

    EIN 392033898 · Headquarters: Elkhorn, WI, US · Environment · Latest available filing year: 2008 · Primary form: IRS Form 990-N

  42. Landmark Conservancy Inc

    EIN 391872550 · Headquarters: MENOMONIE, WI, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990

  43. Landscapes for the Future

    EIN 923800474 · Headquarters: Hartland, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  44. Last Wilderness Conservation Association

    EIN 391788228 · Headquarters: PRESQUE ISLE, WI, US · Environment · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  45. Launch Inc

    EIN 262681229 · Headquarters: Washington Island, WI, USA · Environment · Latest available filing year: 2021 · Primary form: IRS Form 990-EZ

  46. Ldh Beautification Foundation

    EIN 300323690 · Headquarters: Delavan, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  47. Legacy Timber Foundation Inc

    EIN 393617038 · Headquarters: Wausau, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  48. Leonardo Academy Inc

    EIN 391881853 · Headquarters: Madison, WI, USA · Environment · Latest available filing year: 2022 · Primary form: IRS Form 990

  49. Linda and Gene Farley Center for Peace Justice and Sustainability

    EIN 272195454 · Headquarters: VERONA, WI, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990

  50. Little Bearskin Lake Association Inc

    EIN 453913998 · Headquarters: Nashotah, WI, US · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  51. Little Butternut Lake Association

    EIN 933344788 · Headquarters: Luck, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  52. Little Lake Butte Des Morts Lake as Soc Inc

    EIN 394802938 · Headquarters: Menahsa, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  53. Little Rice Lake Association Inc

    EIN 823396268 · Headquarters: CRANDON, WI, US · Environment · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  54. Long Lake Advancement Association Inc

    EIN 260116678 · Headquarters: Brillion, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  55. Long Lake Association

    EIN 391934517 · Headquarters: Phelps, WI, US · Environment · Latest available filing year: 2007 · Primary form: IRS Form 990-N

  56. Long Lake Association Inc

    EIN 391305315 · Headquarters: Saxeville, WI, US · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  57. Long Lake Association-shawano County

    EIN 710999967 · Headquarters: Embarrass, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  58. Long Lake Preservation Association

    EIN 391806089 · Headquarters: BIRCHWOOD, WI, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  59. Long Trade Lake Association Inc

    EIN 873325351 · Headquarters: LUCK, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  60. Loon Lake Property Owners Association Inc

    EIN 392025744 · Headquarters: DANBURY, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  61. Lotus Lake Association

    EIN 020651528 · Headquarters: Dresser, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  62. Lower Chippewa Invasives Partnership Inc

    EIN 473567439 · Headquarters: MENOMONIE, WI, US · Environment · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  63. Lower Long Lake Foundation Inc

    EIN 391867054 · Headquarters: EAU CLAIRE, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  64. Lower Nashotah Lake Association

    EIN 800743782 · Headquarters: Summit, WI, US · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  65. Lower Nemahbin Lake Assoc Ltd

    EIN 900781967 · Headquarters: Delafield, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  66. Lower Sugar River Watershed

    EIN 460633046 · Headquarters: BRODHEAD, WI, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  67. Lumberjack Resource Conservation & Development Council Inc

    EIN 391451327 · Headquarters: RHINELANDER, WI, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990

  68. Lyndon Knights Snowmobile Club Inc

    EIN 391748527 · Headquarters: ARLINGTON, WI, US · Environment · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  69. Lynx Lake Conservation Foundation Inc

    EIN 811658340 · Headquarters: Milwaukee, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  70. Machickenanee Advancement Assn

    EIN 821422226 · Headquarters: Seymour, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  71. Madeline Island Community Gardening Project Inc

    EIN 271279947 · Headquarters: La Pointe, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  72. Madeline Island Land Trust Inc

    EIN 842127796 · Headquarters: La Pointe, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  73. Madeline Island Wilderness Preserve

    EIN 391608461 · Headquarters: LA POINTE, WI, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990

  74. Madison Area Master Gardeners Association Inc

    EIN 391694554 · Headquarters: Madison, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  75. Madison Environmental Resourcing Inc

    EIN 391531753 · Headquarters: MADISON, WI, USA · Environment · Latest available filing year: 2023 · Primary form: IRS Form 990

  76. Maiden Lake Club Association Inc

    EIN 611595501 · Headquarters: LAKEWOOD, WI, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990

  77. Malcolm Stack Foundation Inc

    EIN 392018087 · Headquarters: RIDGEWAY, WI, USA · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  78. Mandaamin Institute Inc

    EIN 453343654 · Headquarters: ELKHORN, WI, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990

  79. Mangold Family Conservation Foundation Inc

    EIN 812533884 · Headquarters: BURLINGTON, WI, USA · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  80. Manitowish Waters Lakes Association Inc

    EIN 391728369 · Headquarters: MANITOWISH WATERS, WI, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990

  81. Manson Lake Association

    EIN 883989502 · Headquarters: Ringle, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  82. Maple Place Inc

    EIN 830732313 · Headquarters: Laona, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  83. Marigold Mile Inc

    EIN 391577826 · Headquarters: APPLETON, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  84. Marion Pond Association

    EIN 352274767 · Headquarters: Marion, WI, US · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  85. Marquette Historical District

    EIN 392008989 · Headquarters: Kewaunee, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  86. Marsh Haven Nature Center Inc

    EIN 391491666 · Headquarters: WAUPUN, WI, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990

  87. Mary E Fitz Memorial Trust

    EIN 396734720 · Headquarters: MENOMONIE, WI, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  88. Master Gardeners of the North

    EIN 391999268 · Headquarters: Rhinelander, WI, US · Environment · Latest available filing year: 2013 · Primary form: IRS Form 990-N

  89. Matthews Lake Association Inc

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

  90. Mcwilliams Heritage Longer Table Project Inc

    EIN 932548928 · Headquarters: La Valle, WI, US · Environment · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  91. Mead Wildlife Area Trust

    EIN 266615961 · Headquarters: WISCONSIN RAPIDS, WI, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  92. Mequon Nature Preserve Inc

    EIN 451562527 · Headquarters: Mequon, WI, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990

  93. Midwest Archaeological Conference Inc

    EIN 710890248 · Headquarters: Beloit, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  94. Midwest Bikeshare Inc

    EIN 461052766 · Headquarters: MILWAUKEE, WI, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990

  95. Midwest Cleaning and Restoration Association Inc

    EIN 391553938 · Headquarters: Milwaukee, WI, US · Environment · Latest available filing year: 2015 · Primary form: IRS Form 990-N

  96. Midwest Houndsmen

    EIN 993204842 · Headquarters: BOYCEVILLE, WI, USA · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  97. Midwest Recycling Association Inc

    EIN 391735413 · Headquarters: AMERY, WI, USA · Environment · Latest available filing year: 2019 · Primary form: IRS Form 990-EZ

  98. Midwest Renewable Energy Association Inc

    EIN 391666119 · Headquarters: CUSTER, WI, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990

  99. Milewski Nature Fund Inc

    EIN 870808660 · Headquarters: Thorp, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  100. Miller Dam Lake Association Inc

    EIN 364505380 · Headquarters: GILMAN, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

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