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. Friends of Lapham Peak Unit - Kettle Mor

    EIN 391650068 · Headquarters: DELAFIELD, WI, USA · Environment · Latest available filing year: 2023 · Primary form: IRS Form 990

  2. Friends of Ledgeview Nature Center

    EIN 391458805 · Headquarters: CHILTON, WI, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  3. Friends of Lone Stone

    EIN 263090345 · Headquarters: CLINTONVILLE, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  4. Friends of Long Lake Inc

    EIN 391802114 · Headquarters: Saxeville, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  5. Friends of Mccarthy Park Inc

    EIN 392027829 · Headquarters: Cottage Grove, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  6. Friends of Mcgilvray Road Inc

    EIN 391657050 · Headquarters: La Crosse, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  7. Friends of Mirror Lake State Park

    EIN 371439852 · Headquarters: BARABOO, WI, USA · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  8. Friends of Moose Lake

    EIN 272581711 · Headquarters: Antigo, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  9. Friends of Namekagon Barrens Wildlife Area

    EIN 640954634 · Headquarters: Spooner, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  10. Friends of New Glarus Woods State Park Inc

    EIN 391993272 · Headquarters: New Glarus, WI, US · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  11. Friends of North Prairie Native Gardens

    EIN 874265965 · Headquarters: North Prairie, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  12. Friends of Owen Conservation Park Inc

    EIN 881551732 · Headquarters: MADISON, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  13. Friends of Pattison and Amnicon Falls State Parks Inc

    EIN 391818678 · Headquarters: SUPERIOR, WI, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  14. Friends of Perch Lake Inc

    EIN 311744774 · Headquarters: HUDSON, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  15. Friends of Pheasant Branch Conservancy Inc

    EIN 391838491 · Headquarters: MIDDLETON, WI, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990

  16. Friends of Pike Lake Inc

    EIN 391931689 · Headquarters: Hartford, WI, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  17. Friends of Reedsburg Parks

    EIN 992115390 · Headquarters: Reedsburg, WI, USA · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990

  18. Friends of Rib Mountain State Park Inc

    EIN 391755818 · Headquarters: Wausau, WI, US · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  19. Friends of Ridgeway Pine Relict Sna Inc

    EIN 811440762 · Headquarters: APPLETON, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  20. Friends of Rowan Creek Inc

    EIN 391998204 · Headquarters: POYNETTE, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  21. Friends of San Damiano Inc

    EIN 852595886 · Headquarters: Monona, WI, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990

  22. Friends of Scenic Lodi Valley Inc

    EIN 391994153 · Headquarters: Lodi, WI, US · Environment · Latest available filing year: 2016 · Primary form: IRS Form 990-N

  23. Friends of Schlitz Audubon Nature Center Inc

    EIN 391231819 · Headquarters: MILWAUKEE, WI, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990

  24. Friends of Schmeeckle Reserve Inc

    EIN 464511784 · Headquarters: Stevens Point, WI, USA · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990

  25. Friends of Six Mile Creek Inc

    EIN 394837796 · Headquarters: Waunakee, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  26. Friends of Sylvania

    EIN 264550981 · Headquarters: MADISON, WI, USA · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  27. Friends of the Ahnapee State Trail Inc

    EIN 391953786 · Headquarters: Kewaunee, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  28. Friends of the Arboretum

    EIN 391571393 · Headquarters: Madison, WI, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  29. Friends of the Baraboo River Inc

    EIN 814224218 · Headquarters: Reedsburg, WI, US · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  30. Friends of the Black River Inc

    EIN 810652264 · Headquarters: BLACK RIVER FALLS, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  31. Friends of the Blufflands Inc

    EIN 813769215 · Headquarters: La Crosse, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  32. Friends of the Branch River

    EIN 391929777 · Headquarters: Whitelaw, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  33. Friends of the Brule River and Forest Inc

    EIN 391769251 · Headquarters: Lake Nebagamon, WI, US · Environment · Latest available filing year: 2015 · Primary form: IRS Form 990-N

  34. Friends of the Cedarburg Bog Inc

    EIN 203622223 · Headquarters: SAUKVILLE, WI, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  35. Friends of the Central Sands Inc

    EIN 452815809 · Headquarters: Coloma, WI, US · Environment · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  36. Friends of the Chippewa River State Trail

    EIN 391947110 · Headquarters: EAU CLAIRE, WI, US · Environment · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  37. Friends of the Evjue School Forest of Merrill Inc

    EIN 562437819 · Headquarters: MERRILL, WI, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  38. Friends of the Florence Wild Rivers Interpretive Center Inc

    EIN 391772938 · Headquarters: FLORENCE, WI, USA · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  39. Friends of the Friendship Trail Inc

    EIN 391961442 · Headquarters: Forest Junction, WI, US · Environment · Latest available filing year: 2011 · Primary form: IRS Form 990-N

  40. Friends of the Gile Flowage Inc

    EIN 300403066 · Headquarters: MONTREAL, WI, US · Environment · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  41. Friends of the Gottfried Prairie and Arboretum Inc

    EIN 932614052 · Headquarters: FOND DU LAC, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  42. Friends of the Holland Sand Prairie Inc

    EIN 933170134 · Headquarters: Holmen, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  43. Friends of the Irvine Park Zoo Inc

    EIN 391814102 · Headquarters: Chippewa FAlls, WI, US · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  44. Friends of the Jersey Flowage Inc

    EIN 271898182 · Headquarters: Tomahawk, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  45. Friends of the Kettle Ponds

    EIN 731632818 · Headquarters: MIDDLETON, WI, US · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  46. Friends of the Kinni

    EIN 473134448 · Headquarters: River Falls, WI, US · Environment · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  47. Friends of the Lakeshore Nature Preserve Inc

    EIN 392036433 · Headquarters: Madison, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  48. Friends of the Lincoln Community Forest Inc

    EIN 383896834 · Headquarters: Ashland, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  49. Friends of the Lower Wisconsin Riverway Inc

    EIN 270950329 · Headquarters: Spring Green, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  50. Friends of the Madison School Forest Inc

    EIN 391852245 · Headquarters: Verona, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  51. Friends of the Mead-mcmillian Association Inc

    EIN 391846412 · Headquarters: milladore, WI, US · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  52. Friends of the Mill Pond & Oak Creek Watercourse

    EIN 432071373 · Headquarters: South Milwaukee, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  53. Friends of the Mill Pond Ltd

    EIN 333494521 · Headquarters: Green Lake, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  54. Friends of the Mukwonago River Inc

    EIN 010859881 · Headquarters: Eagle, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  55. Friends of the National Estuarine Research Reserve

    EIN 820785414 · Headquarters: Superior, WI, US · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  56. Friends of the North Pikes Creek Wetlands

    EIN 464067602 · Headquarters: Bayfield, WI, USA · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990

  57. Friends of the Platte River Inc

    EIN 510608554 · Headquarters: Cuba City, WI, US · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  58. Friends of the Red Cedar Basin Inc

    EIN 462123180 · Headquarters: Menomonie, WI, US · Environment · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  59. Friends of the St Croix Headwaters Inc

    EIN 202005592 · Headquarters: Gordon, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  60. Friends of the St Croix Wetland Management District Inc

    EIN 272443489 · Headquarters: New Richmond, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  61. Friends of the Tuscobia Trail Inc

    EIN 752978521 · Headquarters: Winter, WI, US · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  62. Friends of the Welty Environmental Center Inc

    EIN 391951248 · Headquarters: BELOIT, WI, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990

  63. Friends of the White River County Park

    EIN 472086504 · Headquarters: Springfield, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  64. Friends of the White River State Trail

    EIN 510459373 · Headquarters: Elkhorn, WI, US · Environment · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  65. Friends of the Wisconsin Great River Road Inc

    EIN 811453435 · Headquarters: Ferryville, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  66. Friends of the Wolf River

    EIN 833894261 · Headquarters: WEST BEND, WI, US · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  67. Friends of the Yahara River Headwaters Inc

    EIN 262140953 · Headquarters: Deforest, WI, US · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  68. Friends of the Yahara River Parkway Inc

    EIN 481302256 · Headquarters: Monona, WI, US · Environment · Latest available filing year: 2013 · Primary form: IRS Form 990-N

  69. Friends of Toft Point Incorporated

    EIN 208770897 · Headquarters: Fish Creek, WI, US · Environment · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  70. Friends of Trempealeau Lakes

    EIN 921485503 · Headquarters: Trempealeau, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  71. Friends of Trempealeau Refuge Inc

    EIN 562638733 · Headquarters: Trempealeau, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  72. Friends of Vernon County Parks & Forests Inc

    EIN 842753967 · Headquarters: VIROQUA, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  73. Friends of Vernon Marsh Inc

    EIN 261678668 · Headquarters: Waukesha, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  74. Friends of Waubesa Wetlands Inc

    EIN 833932682 · Headquarters: Madison, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  75. Friends of Wehr Nature Center Inc

    EIN 391416519 · Headquarters: FRANKLIN, WI, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990

  76. Friends of Willow River Cemetery Inc

    EIN 843091543 · Headquarters: Hudson, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  77. Friends of Willow River-Kinnickinnic State Parks

    EIN 391667467 · Headquarters: Hudson, WI, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990

  78. Friends of Wisconsin Preservation Fund Inc

    EIN 391867005 · Headquarters: Thiensville, WI, US · Environment · Latest available filing year: 2014 · Primary form: IRS Form 990-N

  79. Friends of Yellowstone Lake State Park

    EIN 611658443 · Headquarters: BLANCHARDVILLE, WI, USA · Environment · Latest available filing year: 2022 · Primary form: IRS Form 990-EZ

  80. Friendship Force of Greater Milwaukee Inc

    EIN 271510642 · Headquarters: Oconomowoc, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  81. Friess Lake Advancement Association

    EIN 883674271 · Headquarters: HUBERTUS, WI, USA · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  82. Fund for Lake Michigan Inc

    EIN 874340021 · Headquarters: Milwaukee, WI, USA · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990

  83. Further Along Inc

    EIN 834434006 · Headquarters: VIROQUA, WI, USA · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990

  84. Future Angler Foundation Inc

    EIN 455330350 · Headquarters: FORESTVILLE, WI, USA · Environment · Latest available filing year: 2023 · Primary form: IRS Form 990

  85. Future Neenah Inc

    EIN 930843731 · Headquarters: NEENAH, WI, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990

  86. Garden Club of Greater Milwaukee

    EIN 882669216 · Headquarters: Mukwonago, WI, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990

  87. Gardeners Club of Green Bay

    EIN 911962337 · Headquarters: Green Green Bay, WI, US · Environment · Latest available filing year: 2014 · Primary form: IRS Form 990-N

  88. Gardeners of America Inc

    EIN 923568429 · Headquarters: ABRAMS, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  89. Gardens of the Fox Cities Inc

    EIN 391741608 · Headquarters: APPLETON, WI, USA · Environment · Latest available filing year: 2013 · Primary form: IRS Form 990

  90. Gary Green Foundation

    EIN 814826859 · Headquarters: HOLMEN, WI, US · Environment · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  91. Gathering Waters Advocacy Fund Inc

    EIN 833752499 · Headquarters: Madison, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  92. Gathering Waters Inc

    EIN 391805090 · Headquarters: MADISON, WI, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990

  93. Gaylord Nelson Audubon Society

    EIN 450608845 · Headquarters: EAU CLAIRE, WI, US · Environment · Latest available filing year: 2018 · Primary form: IRS Form 990-N

  94. Geneva Lake Association Inc

    EIN 390302321 · Headquarters: LAKE GENEVA, WI, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  95. Geneva Lake Conservancy Inc

    EIN 391418947 · Headquarters: FONTANA, WI, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990

  96. Gibraltar Land Acquisition Directive

    EIN 331017714 · Headquarters: Fish Creek, WI, US · Environment · Latest available filing year: 2008 · Primary form: IRS Form 990-N

  97. Gilmore Lake Property Owners Association Inc

    EIN 391733225 · Headquarters: Minong, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  98. Glacial Drumlin Horse Trail Association Inc

    EIN 391653524 · Headquarters: Sun Prairie, WI, US · Environment · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  99. Glacial Lakes Conservancy Inc

    EIN 391849140 · Headquarters: SHEBOYGAN, WI, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990

  100. Glacierland Resource Conservation & Development Councile Inc

    EIN 391813461 · Headquarters: GREEN BAY, WI, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990

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