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. Global Climate Change Foundation

    EIN 263648295 · Headquarters: WAUKESHA, WI, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  2. Global Science Institute

    EIN 263790003 · Headquarters: Antigo, WI, US · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  3. Golden Lake Association Inc

    EIN 392038383 · Headquarters: Oconomowoc, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  4. Golden Sands Resource Conservation and Development Council Incorporated

    EIN 391451323 · Headquarters: STEVENS POINT, WI, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990

  5. Grafton Parks Society

    EIN 881516825 · Headquarters: GRAFTON, WI, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990

  6. Graham-martin Foundation Inc

    EIN 841623927 · Headquarters: EVANSVILLE, WI, USA · Environment · Latest available filing year: 2019 · Primary form: IRS Form 990-EZ

  7. Grand Lake Improvement Association

    EIN 320503594 · Headquarters: Kingston, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  8. Great Lake Instituion of Pine Eoc Systems Reseach Inc

    EIN 391941548 · Headquarters: Colfax, WI, US · Environment · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  9. Great Lakes Forest Alliance Inc

    EIN 391616359 · Headquarters: MADISON, WI, USA · Environment · Latest available filing year: 2013 · Primary form: IRS Form 990-EZ

  10. Great River Garden Club Inc

    EIN 332814619 · Headquarters: Cassville, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  11. Great River State Trail Friends Inc

    EIN 391703223 · Headquarters: Trempealeau, WI, US · Environment · Latest available filing year: 2014 · Primary form: IRS Form 990-N

  12. Greater Madison Health Lawn Team Inc

    EIN 820570224 · Headquarters: Madison, WI, US · Environment · Latest available filing year: 2010 · Primary form: IRS Form 990-N

  13. Green Bay Botanical Garden Inc

    EIN 391485020 · Headquarters: GREEN BAY, WI, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990

  14. Green Bay Jewish Welfare Fund Inc

    EIN 237087665 · Headquarters: Green Bay, WI, US · Environment · Latest available filing year: 2016 · Primary form: IRS Form 990-N

  15. Green Bay Southwest High School Parent Network

    EIN 680645546 · Headquarters: Green Bay, WI, US · Environment · Latest available filing year: 2010 · Primary form: IRS Form 990-N

  16. Green Bay Woods & Lake Club

    EIN 396075783 · Headquarters: Green Bay, WI, US · Environment · Latest available filing year: 2007 · Primary form: IRS Form 990-N

  17. Green Forest Inc

    EIN 611548166 · Headquarters: MADISON, WI, USA · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  18. Green Gallery

    EIN 932624915 · Headquarters: Brookfield, WI, US · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  19. Green Lake Aquatic Structure Inc

    EIN 843983495 · Headquarters: PRINCETON, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  20. Green Lake Association Inc

    EIN 391047600 · Headquarters: GREEN LAKE, WI, USA · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990

  21. Green Lake Conservancy

    EIN 391832346 · Headquarters: Green Lake, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990

  22. Green Tree Garden Club Inc

    EIN 392027788 · Headquarters: MEQUON, WI, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  23. Green Valley Sportsmans Club Inc

    EIN 830567676 · Headquarters: Franklin, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  24. Green-rock Audubon Society Inc

    EIN 391724790 · Headquarters: JANESVILLE, WI, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990

  25. Greener Oconomowoc Inc Go

    EIN 263785820 · Headquarters: Oconowomoc, WI, US · Environment · Latest available filing year: 2017 · Primary form: IRS Form 990-N

  26. Greening Greater Racine

    EIN 814399582 · Headquarters: RACINE, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  27. Gresham Lakes Association Inc

    EIN 352350233 · Headquarters: Boulder Junction, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  28. Grindstone Lake Association

    EIN 204977564 · Headquarters: Hayward, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  29. Groundswell Conservancy Inc

    EIN 391452825 · Headquarters: MADISON, WI, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990

  30. Groundwork Milwaukee Inc

    EIN 320182692 · Headquarters: MILWAUKEE, WI, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990

  31. Grow to Share Inc

    EIN 270584863 · Headquarters: River Falls, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  32. Growing Collective

    EIN 332753750 · Headquarters: STEVENS POINT, WI, US · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  33. Growing South Milwaukee Inc

    EIN 475090918 · Headquarters: SOUTH MILWAUKEE, WI, US · Environment · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  34. Guardians of Lake Decorah Inc

    EIN 861970907 · Headquarters: MAUSTON, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  35. Gull Lake Association Inc

    EIN 391999772 · Headquarters: Springbrook, WI, US · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  36. Gustave De Neveu Society Inc

    EIN 881952625 · Headquarters: Fond du Lac, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  37. Half Moon Lake Conservancy Inc

    EIN 200469345 · Headquarters: Balsam Lake, WI, US · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  38. Hancock Lake Association Inc

    EIN 421693275 · Headquarters: Harshaw, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  39. Happy Tonics

    EIN 261911547 · Headquarters: Shell Lake, WI, US · Environment · Latest available filing year: 2010 · Primary form: IRS Form 990-N

  40. Harbor District Inc

    EIN 471388101 · Headquarters: MILWAUKEE, WI, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990

  41. Harris Lake Association Inc

    EIN 391990596 · Headquarters: VERONA, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  42. Hasbrook Lake Association Inc

    EIN 391767651 · Headquarters: LAKE TOMAHAWK, WI, US · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  43. Hatch Lake Association

    EIN 391624492 · Headquarters: Iola, WI, US · Environment · Latest available filing year: 2010 · Primary form: IRS Form 990-N

  44. Hatch Lake Iola Wi Association

    EIN 831468355 · Headquarters: MENOMONEE FALLS, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  45. Head of the Lakes Beekeeping Association Inc

    EIN 842303394 · Headquarters: Superior, WI, US · Environment · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  46. Headwaters Fisheries Inc

    EIN 994135169 · Headquarters: MANITOWISH WATERS, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  47. Healing Roots Collaborative

    EIN 992083568 · Headquarters: Madison, WI, US · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  48. Healthy Climate Wisconsin Inc

    EIN 851315658 · Headquarters: MADISON, WI, USA · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990

  49. Heartland Threads Inc

    EIN 844930852 · Headquarters: Madison, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  50. Heckrodt Wetland Reserve Inc

    EIN 391838222 · Headquarters: MENASHA, WI, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990

  51. Hidden Lake Conservancy Inc

    EIN 812923200 · Headquarters: BROOKFIELD, WI, USA · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  52. High Fish Trap Rush Lake Association

    EIN 800380928 · Headquarters: Boulder Junction, WI, US · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  53. Hill Country Watershed Alliance Inc

    EIN 933368956 · Headquarters: Viroqua, WI, US · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  54. Hope for Earth Inc

    EIN 992752933 · Headquarters: River Falls, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  55. Hudson Home and Garden Club

    EIN 391780177 · Headquarters: Hudson, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  56. Hunter Lake Vilas Co Corp

    EIN 813261457 · Headquarters: Conover, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  57. Huron Lake Association

    EIN 752975214 · Headquarters: Plainfield, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  58. Indian Lake Association

    EIN 320258117 · Headquarters: EAGLE RIVER, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  59. Inland Sea Society Inc

    EIN 391721327 · Headquarters: Washburn, WI, US · Environment · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  60. Innov8tec Inc

    EIN 923261133 · Headquarters: SIREN, WI, USA · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990

  61. Institute for the Study of Energy and Our Future

    EIN 261233189 · Headquarters: ELLSWORTH, WI, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990

  62. Institute of Management Accountants Inc

    EIN 237382513 · Headquarters: Manitowoc, WI, US · Environment · Latest available filing year: 2013 · Primary form: IRS Form 990-N

  63. Institute of Management Accountants Inc

    EIN 411277930 · Headquarters: EAU CLAIRE, WI, US · Environment · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  64. Interfaith Community for the Earth Inc

    EIN 274832504 · Headquarters: Almond, WI, US · Environment · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  65. Intermezzo Gardens Foundation

    EIN 206590780 · Headquarters: PEWAUKEE, WI, USA · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  66. International Association of Meteorology and Atmospheric Sciences

    EIN 874151202 · Headquarters: MADISON, WI, USA · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  67. International Energy Program Evaluation Conference

    EIN 264392451 · Headquarters: MADISON, WI, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990

  68. International Symposium on Fireworks Society Ltd

    EIN 824342644 · Headquarters: WHITEFISH BAY, WI, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990

  69. International Union of Soil Sciences Inc

    EIN 461007367 · Headquarters: Madison, WI, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990

  70. Into the Wild Inc

    EIN 391943842 · Headquarters: TREGO, WI, US · Environment · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  71. Invasive Plants Association of Wisconsin Incorporated

    EIN 392020468 · Headquarters: Madison, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  72. Ipm Voice Inc

    EIN 450955794 · Headquarters: Madison, WI, US · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  73. Iron River Pike Chain of Lakes Inc

    EIN 900531361 · Headquarters: Iron River, WI, USA · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  74. Island Chain of Lakes Association Inc

    EIN 830802634 · Headquarters: New Auburn, WI, US · Environment · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  75. Izaak Walton League of America Belo

    EIN 396073983 · Headquarters: Beloit, WI, USA · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  76. Izaak Walton League of America Endowment

    EIN 366076589 · Headquarters: AMHERST JUNCTION, WI, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990

  77. J&r Aquatic Animal Rescue

    EIN 850555791 · Headquarters: MENASHA, WI, USA · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  78. Juneau Park Friends Inc

    EIN 454600828 · Headquarters: Milwaukee, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  79. K&g Restoration Inc

    EIN 843521217 · Headquarters: Milwaukee, WI, US · Environment · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  80. Kangaroo Lake Association Incorporated

    EIN 300211573 · Headquarters: Baileys Harbor, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  81. Karner Blue Garden Club Inc

    EIN 391860253 · Headquarters: Black River Falls, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  82. Keep Greater Milwaukee Beautiful

    EIN 391449048 · Headquarters: MILWAUKEE, WI, USA · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  83. Keep Wetlands

    EIN 991613760 · Headquarters: Green Bay, WI, US · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  84. Kelly Lakes Association Inc

    EIN 391780522 · Headquarters: hales Corners, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  85. Kenosha Fisheries Restoration Foundation

    EIN 921819240 · Headquarters: Kenosha, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  86. Kettle Moraine Garden Club Inc

    EIN 396081392 · Headquarters: Nashotah, WI, USA · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  87. Kettle Moraine Land Trust Inc

    EIN 392010641 · Headquarters: ELKHORN, WI, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990

  88. Kids in Motion Inc

    EIN 820655826 · Headquarters: Barneveld, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  89. Kimball Lakes Conservation Association Inc

    EIN 842628168 · Headquarters: AMERY, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  90. Kinni Corridor Collaborative

    EIN 834079628 · Headquarters: River Falls, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  91. Kinnickinnic River Land Trust Inc

    EIN 396593121 · Headquarters: RIVER FALLS, WI, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990

  92. Koenig's Conservation Association Inc

    EIN 474696006 · Headquarters: SHEBOYGAN FALLS, WI, USA · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  93. Kohler Trust for Clean Water

    EIN 326513655 · Headquarters: KOHLER, WI, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990

  94. Kohler Trust for Preservation

    EIN 391579803 · Headquarters: KOHLER, WI, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990

  95. Kompost Kids Inc

    EIN 611659525 · Headquarters: Milwaukee, WI, US · Environment · Latest available filing year: 2018 · Primary form: IRS Form 990-N

  96. Kuse Farm Museum and Nature Preserve Inc

    EIN 861736513 · Headquarters: MEDFORD, WI, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990

  97. La Schneiderdhs Mounds and Habitat Uniting Native Tribes Fnd Inc (Mahunt)

    EIN 391962426 · Headquarters: MIDDLETON, WI, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  98. Lac La Belle Environmental Foundation Inc

    EIN 391646178 · Headquarters: OCONOMOWOC, WI, US · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  99. Lac Vieux Desert Association Inc

    EIN 391684053 · Headquarters: LAND O LAKES, WI, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  100. Lacrosse River State Bike Trail

    EIN 391712387 · Headquarters: WEST SALEM, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

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