Data / Nonprofits / Idaho / Environment
Environment nonprofits in Idaho: 224 registered with the IRS
224 environment nonprofits are registered with the IRS in Idaho, 205 of them 501(c)(3) charities; the 96 that report revenue took in $68.2 million. The most are in Boise (58), Hailey (9), Sandpoint (9). The largest by revenue: Wood River Land Trust Company ($7.3 million), Wafwa Species Restoration Foundation ($6.4 million), Idaho Botanical Gardens Inc ($5.5 million).
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Every organization, largest by revenue first
| Organization | City | Type | Since | Revenue | Assets | Filing |
|---|---|---|---|---|---|---|
| Wood River Land Trust Company | Hailey | 501(c)(3) | 1995 | $7.3 million | $41.2 million | 2025-03 |
| Wafwa Species Restoration Foundation | Boise | 501(c)(4) | 2014 | $6.4 million | $49.8 million | 2025-06 |
| Idaho Botanical Gardens Inc | Boise | 501(c)(3) | 1983 | $5.5 million | $8.5 million | 2025-03 |
| Teton Regional Land Trust | Driggs | 501(c)(3) | 1995 | $4.5 million | $15.4 million | 2025-12 |
| Clearwater-Potlatch Timber Protective Association Inc | Orofino | 501(c)(4) | 1983 | $3.5 million | $5.2 million | 2025-06 |
| Idaho Basecamp | Ketchum | 501(c)(3) | 2014 | $2.7 million | $4.9 million | 2025-08 |
| Wildland Firefighter Foundation | Boise | 501(c)(3) | 2003 | $2.7 million | $6.3 million | 2025-12 |
| Friends of the Teton River Inc | Driggs | 501(c)(3) | 2000 | $2.5 million | $1.5 million | 2025-06 |
| Advocates for the West Inc | Boise | 501(c)(3) | 2002 | $2.5 million | $2.8 million | 2025-12 |
| Western Watersheds Project Inc | Hailey | 501(c)(3) | 1994 | $2.1 million | $629,223 | 2025-12 |
| Palouse Clearwater Environmental Institute Incorporated | Moscow | 501(c)(3) | 1992 | $1.9 million | $3.6 million | 2024-12 |
| Sagebrush Habitat Conservation Fund Inc | Hailey | 501(c)(3) | 2012 | $1.8 million | $12.3 million | 2025-12 |
| Foresight Conservation Inc | Hailey | 501(c)(3) | 2024 | $1.7 million | $157,101 | 2025-12 |
| Consolidated Irrigation Company | Preston | 501(c)(12) | 2012 | $1.3 million | $12.7 million | 2025-12 |
| Kaniksu Land Trust Inc | Sandpoint | 501(c)(3) | 2015 | $1.2 million | $7.5 million | 2024-12 |
| Selway-Bitterroot Foundation | Boise | 501(c)(3) | 2010 | $1.1 million | $535,807 | 2025-12 |
| Blueribbon Coalition Inc | Pocatello | 501(c)(3) | 1995 | $1 million | $1 million | 2024-12 |
| Project Big Wood A Nonprofit Corporation | Ketchum | 501(c)(3) | 2022 | $884,641 | $209,028 | 2025-06 |
| Sagebrush Steppe Land Trust Inc | Pocatello | 501(c)(3) | 2005 | $812,492 | $8 million | 2025-12 |
| High Country Resource Conservation and Development Area Inc | Saint Anthony | 501(c)(3) | 1993 | $668,222 | $222,239 | 2025-12 |
| The Earthfire Institute | Driggs | 501(c)(3) | 2001 | $632,234 | $5.6 million | 2024-12 |
| Idaho Advanced Energy Consortium Incorporated | Idaho Falls | 501(c)(6) | 2023 | $621,170 | $304,203 | 2025-09 |
| Palouse Land Trust Inc | Moscow | 501(c)(3) | 1995 | $615,004 | $2.6 million | 2025-06 |
| Oden Water Association Inc | Sandpoint | 501(c)(12) | 2002 | $597,194 | $3.1 million | 2025-12 |
| Snake River Waterkeeper Inc | Boise | 501(c)(3) | 2014 | $581,554 | $608,537 | 2025-12 |
| Teton Valley Trails & Pathways Incorporated | Driggs | 501(c)(3) | 1999 | $557,459 | $630,420 | 2025-03 |
| Idaho Rivers United Inc | Boise | 501(c)(3) | 1995 | $552,117 | $104,475 | 2024-12 |
| Sawtooth Society Inc | Hailey | 501(c)(3) | 1998 | $520,826 | $913,931 | 2024-12 |
| Salmon Valley Stewardship | Salmon | 501(c)(3) | 2006 | $504,834 | $267,738 | 2024-12 |
| Building Material Thrift Store | Bellevue | 501(c)(3) | 2021 | $482,808 | $182,749 | 2024-12 |
| Friends of Weiser River Trail Inc | Boise | 501(c)(3) | 1997 | $480,809 | $12.6 million | 2025-12 |
| Garwood Water Cooperative Garwood RT 3 Box 75G | Hayden | 501(c)(12) | 2013 | $466,331 | $357,695 | 2023-12 |
| Lower Boise Watershed Council Inc | Nampa | 501(c)(3) | 1997 | $454,607 | $61,430 | 2025-09 |
| Bear Lake Watch | Saint Charles | 501(c)(3) | 1995 | $437,857 | $1.2 million | 2024-12 |
| Land Trust of the Treasure Valley | Boise | 501(c)(3) | 1997 | $398,336 | $1.6 million | 2024-12 |
| Ecosystem Sciences Foundation | Boise | 501(c)(3) | 2001 | $388,503 | $84,732 | 2025-12 |
| Sawtooth Botanical Garden Inc | Ketchum | 501(c)(3) | 1995 | $370,774 | $1.9 million | 2024-12 |
| Craters of the Moon Natural History Association Inc | Arco | 501(c)(3) | 1961 | $361,490 | $891,468 | 2025-09 |
| Idaho Association of Soil Conservation Districts Inc | Boise | 501(c)(3) | 1993 | $302,251 | $451,927 | 2025-06 |
| Terragraphics International Foundation Inc | Moscow | 501(c)(3) | 2013 | $293,626 | $386,659 | 2024-12 |
| Friends of Deer Flat Wildlife Refuge | Nampa | 501(c)(3) | 2006 | $291,108 | $213,068 | 2025-09 |
| Valley Advocates for Responsible Development Inc | Driggs | 501(c)(3) | 2003 | $290,912 | $384,535 | 2025-12 |
| Southwest Idaho Resource Conservation & Development RC&D Co | Meridian | 501(c)(3) | 1995 | $255,877 | $198,696 | 2024-12 |
| Friends of Scotchman Peaks Wilderness Inc | Sandpoint | 501(c)(3) | 2007 | $242,154 | $244,329 | 2025-09 |
| Model Forest Policy Program Inc | Sagle | 501(c)(3) | 2010 | $230,995 | $142,995 | 2024-12 |
| Trans Cascadia Inc | Dalton GDNS | 501(c)(3) | 2020 | $229,395 | $21,196 | 2024-12 |
| Idaho Organization of Resource Councils Inc | Boise | 501(c)(3) | 2015 | $228,317 | $205,853 | 2024-12 |
| Treasure Valley Canopy Network Inc | Boise | 501(c)(3) | 2022 | $214,161 | $107,992 | 2023-12 |
| Harris Ranch Wildlife Mitigation Association Inc | Boise | 501(c)(3) | 2014 | $209,655 | $441,150 | 2025-12 |
| Wildlens Inc | Boise | 501(c)(3) | 2011 | $191,058 | $37,204 | 2025-12 |
| Patagonian Land Conservation Trust Inc | Boise | 501(c)(3) | 2012 | $185,179 | $21,403 | 2024-12 |
| Idaho Foundation for Parks and Lands | Boise | 501(c)(3) | 1975 | $173,840 | $20.7 million | 2025-12 |
| Lemhi Regional Land Trust | Salmon | 501(c)(3) | 2006 | $171,001 | $3.3 million | 2025-06 |
| Friends of the Clearwater Inc | Moscow | 501(c)(3) | 1996 | $155,887 | $83,109 | 2024-12 |
| Full Circle Education Incorporated | Victor | 501(c)(3) | 2012 | $153,882 | $41,514 | 2025-12 |
| Portneuf Greenway Foundation Inc | Pocatello | 501(c)(3) | 1993 | $151,919 | $257,309 | 2024-12 |
| Idaho Coalition of Land Trusts | Boise | 501(c)(3) | 2015 | $148,671 | $166,715 | 2025-06 |
| Idaho Solid Waste Association Inc | Boise | 501(c)(3) | 2014 | $136,545 | $96,197 | 2025-12 |
| Treasure Valley Clean Cities Coalition Inc | Boise | 501(c)(3) | 2007 | $126,707 | $181,563 | 2025-12 |
| Idaho Sustainability and Energy Coalition | Ammon | 501(c)(3) | 2021 | $123,034 | $144,873 | 2025-12 |
| Boise Urban Garden School | Boise | 501(c)(3) | 2004 | $121,511 | $218,655 | 2025-12 |
| The Snake River Alliance Education Fund Inc | Boise | 501(c)(3) | 1984 | $111,965 | $174,686 | 2025-12 |
| Idaho Energy Freedom | Boise | 501(c)(4) | 2024 | $105,600 | $40,524 | 2025-12 |
| Teton Valley Community Recycling Incorporated | Driggs | 501(c)(3) | 1997 | $104,873 | $133,570 | 2025-12 |
| North American Lily Society Inc | Bonners Ferry | 501(c)(3) | 1966 | $103,994 | $683,602 | 2024-12 |
| Eureka Institute Inc | Sandpoint | 501(c)(3) | 2012 | $103,660 | $27,420 | 2024-12 |
| Idaho Sfi Implementation Committee Inc | Boise | 501(c)(3) | 2012 | $101,731 | $64,631 | 2025-12 |
| Surface Water Coalition Inc | Twin Falls | 501(c)(4) | 2023 | $99,333 | $800,032 | 2024-12 |
| Treasure Valley Water Users Association | Meridian | 501(c)(4) | 2015 | $98,569 | $23,309 | 2025-12 |
| Idaho Concrete and Aggregate Producers Association Inc | Boise | 501(c)(6) | 2024 | $97,339 | $78,970 | 2025-12 |
| Kootenai Environmental Alliance | Coeur Dalene | 501(c)(3) | 2025 | $96,979 | $150,832 | 2020-12 |
| Concerned Citizens Protecting the Spokane River | Post Falls | 501(c)(3) | 2025 | $95,963 | $21,359 | 2025-12 |
| Idaho Smart Growth Inc | Boise | 501(c)(3) | 2000 | $86,048 | $20,218 | 2024-12 |
| Lake City Trail Builders Association | Coeur D Alene | 501(c)(3) | 2017 | $85,362 | $34,955 | 2025-12 |
| Reuse Market Inc | Boise | 501(c)(3) | 2009 | $82,572 | $159,709 | 2024-12 |
| Apex Alliance Inc | Meridian | 501(c)(3) | 2022 | $80,021 | $2.6 million | 2024-12 |
| Friends of Prairiescape Incorporated | Moscow | 501(c)(3) | 2021 | $78,622 | $27,209 | 2025-12 |
| Yellowstone To Uintas Connection | Paris | 501(c)(3) | 2012 | $78,387 | $8,437 | 2025-12 |
| Henrys Fork Wildlife Alliance Inc | Ashton | 501(c)(3) | 2019 | $77,228 | $73,986 | 2024-12 |
| Malad Valley Irrigating Company | Malad City | 501(c)(3) | 2022 | $73,240 | $109,330 | 2026-01 |
| Nimiipuu Ecosystems Restoration Inc | Lapwai | 501(c)(3) | 2021 | $68,044 | $44,169 | 2025-12 |
| Pulaski Users Group Inc | Stanley | 501(c)(3) | 2021 | $67,248 | $59,868 | 2025-12 |
| Idaho Business for the Outdoors | Boise | 501(c)(3) | 2017 | $62,615 | $76,733 | 2025-12 |
| Eastern Idaho Water Coalition Inc | Blackfoot | 501(c)(3) | 2008 | $62,464 | $20,026 | 2025-12 |
| Orton Botanical Garden Inc | Twin Falls | 501(c)(3) | 2020 | $61,046 | $504,998 | 2025-12 |
| Ketchum Community Development Corporation | Ketchum | 501(c)(3) | 2007 | $56,786 | $1 million | 2024-12 |
| Magic Valley Land Trust Inc | Kimberly | 501(c)(3) | 2000 | $53,338 | $162,777 | 2025-12 |
| Dry Creek Historical Society Inc | Boise | 501(c)(3) | 2006 | $49,095 | $39,563 | 2025-12 |
| Kieshas Preserve Inc | Paris | 501(c)(3) | 2024 | $47,918 | $600,539 | 2025-12 |
| Henrys Lake Foundation | Island Park | 501(c)(3) | 2022 | $47,343 | $217,660 | 2025-12 |
| Boise River Enhancement Network Inc | Boise | 501(c)(3) | 2018 | $44,994 | $112,661 | 2025-12 |
| Rock Creek Alliance Inc | Sandpoint | 501(c)(3) | 1999 | $42,658 | $107,646 | 2024-12 |
| Idaho Washington Aquifer Collaborative Inc | Post Falls | 501(c)(3) | 2023 | $36,011 | $24,818 | 2025-12 |
| Boise Valley Snowmobile Association Inc | Boise | 501(c)(3) | 2016 | $21,767 | $8,542 | 2025-12 |
| Riseline Foundation Inc | Ketchum | 501(c)(3) | 2026 | $11,500 | $11,500 | 2025-12 |
| Targhee Trail Riders | Island Park | 501(c)(3) | 2023 | $499 | $16,787 | 2025-12 |
| 208 Cleanup Inc | Meridian | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Arbor Day Organization of North Idaho Inc | Coeur D Alene | 501(c)(3) | 2026 | $0 | $0 | 2025-12 |
| B On 33 - Beautifying Our Byways Inc | Victor | 501(c)(3) | 2025 | |||
| Between the Mountains Garden Club | Salmon | 501(c)(3) | 2025 | |||
| Big Payette Lake Water Quality Council | McCall | 501(c)(3) | 2019 | $0 | $0 | 2025-12 |
| Billion Tree Project Inc | Eagle | 501(c)(3) | 2022 | $0 | $0 | 2025-12 |
| Bonner County Master Gardener Association | Ponderay | 501(c)(3) | 2010 | $0 | $0 | 2025-12 |
| Bright Sky Water Association Inc | Athol | 501(c)(12) | 2023 | $0 | $0 | 2026-08 |
| Cedar Springs Community Water Inc | Sagle | 501(c)(3) | 2024 | $0 | $0 | 2024-12 |
| Citizens for Healthy Rivers Inc | Lewiston | 501(c)(3) | 2026 | |||
| Clade Foundation Inc | Franklin | 501(c)(3) | 2022 | $277,423 | 2025-12 | |
| Clean Energy Opportunities Inc | Boise | 501(c)(4) | 2023 | $0 | $0 | 2025-12 |
| Clearwater Collective Inc | Kamiah | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Cloudsledge Conservation Trust | Hope | 501(c)(3) | 1998 | $10.3 million | 2025-12 | |
| Coeur Dalene Garden Club | Coeur D Alene | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| Coeur Dalene Glass Recycling Company | Coeur D Alene | 501(c)(3) | 2014 | $0 | $0 | 2025-12 |
| Conservation Opportunities | Viola | 501(c)(3) | 2020 | $0 | $0 | 2025-09 |
| Conservation Science Institute Inc | Boise | 501(c)(3) | 2023 | $0 | $0 | 2023-12 |
| Desolation Vanguard Incorporated | Kuna | 501(c)(3) | 2024 | $0 | $0 | 2023-12 |
| Discover Idaho Wilderness | Rigby | 501(c)(3) | 2023 | $1 | 2023-12 | |
| Evening Star Lane Water Association | Athol | 501(c)(12) | 2023 | $0 | $0 | 2025-12 |
| Feed the Family | Boise | 501(c)(3) | 2014 | $0 | $0 | 2024-01 |
| Foundation for Ada Canyon Trail Systems Inc | Nampa | 501(c)(3) | 1994 | $0 | $0 | 2025-08 |
| Franklin Domestic Water Users | Boise | 501(c)(12) | 2015 | $0 | $0 | 2023-12 |
| Friends of Blue Heart Springs Inc | Buhl | 501(c)(3) | 2025 | $0 | $0 | 2024-12 |
| Friends of Edson Fichter Nature Area | Pocatello | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| Friends of Idaho State Parks Inc | Boise | 501(c)(3) | 2013 | $0 | $0 | 2025-12 |
| Friends of Morrison Knudsen Nature Center | Boise | 501(c)(3) | 2015 | $0 | $0 | 2025-12 |
| Friends of Murgoitio Park Inc | Boise | 501(c)(3) | 2021 | $0 | $0 | 2023-12 |
| Friends of North Idaho Trails Inc | Hayden | 501(c)(3) | 2023 | $0 | $0 | 2025-12 |
| Friends of the Pend Doreille Bay Trail Inc | Sandpoint | 501(c)(3) | 2011 | $0 | $0 | 2025-12 |
| Garden Clubs of Idaho Inc | Nampa | 501(c)(3) | 2010 | $0 | $0 | 2025-06 |
| Golden Garden Club | Boise | 501(c)(3) | 2019 | $0 | $0 | 2026-06 |
| Hailey Parks Foundation Inc | Hailey | 501(c)(3) | 2003 | $0 | $0 | 2025-12 |
| Hayden Lake Watershed Association | Hayden | 501(c)(3) | 2010 | $0 | $0 | 2025-12 |
| High Resolution Rivers | Boise | 501(c)(3) | 2019 | $0 | $0 | 2025-12 |
| Hill and Valley Garden Club | Kendrick | 501(c)(3) | 2018 | $0 | $0 | 2026-01 |
| Idaho Clean Energy Association Inc | Boise | 501(c)(3) | 2014 | $0 | $0 | 2026-01 |
| Idaho Clinicians for Climate and Health | Boise | 501(c)(3) | 2023 | $0 | $0 | 2025-12 |
| Idaho Falls Community Garden Association Inc | Idaho Falls | 501(c)(3) | 1996 | $0 | $0 | 2025-12 |
| Idaho Forest Owners Association Education Foundation | Coeur D Alene | 501(c)(3) | 2017 | $0 | $0 | 2025-12 |
| Idaho Forest Restoration Partnership Inc | Boise | 501(c)(3) | 2021 | $25,323 | 2025-12 | |
| Idaho Interfaith Power & Light | Caldwell | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| Idaho Outdoor Association | Boise | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| Idaho Overland Association | Idaho Falls | 501(c)(3) | 2022 | $19,609 | 2025-12 | |
| Idaho River Kids Inc | Boise | 501(c)(3) | 2003 | $0 | $0 | 2025-03 |
| Idaho Section American Nuclear Society Inc | Idaho Falls | 501(c)(3) | 1982 | $0 | $0 | 2025-06 |
| Idaho Section of the Society for Range Management Inc | Jerome | 501(c)(3) | 1995 | $0 | $0 | 2025-12 |
| Idaho Single Track Alliance | Idaho Falls | 501(c)(3) | 2020 | $0 | $0 | 2025-12 |
| Idaho Tree Farm Program | Rathdrum | 501(c)(3) | 2018 | $0 | $0 | 2025-12 |
| Idaho Water Education Foundation Inc | Boise | 501(c)(3) | 1995 | $0 | $0 | 2025-12 |
| Ilc Foundation Inc | St Maries | 501(c)(3) | 2026 | |||
| Indoor Exposure Index Index Inc | Nampa | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Institute of Ecolonomics | Nampa | 501(c)(3) | 2015 | $1,570 | 2025-06 | |
| Kinnikinnick Native Plant Society | Sandpoint | 501(c)(3) | 2005 | $0 | $0 | 2025-06 |
| Kootenai Land and Resource Conservation Trust | Coeur D Alene | 501(c)(3) | 2012 | $0 | $0 | 2025-12 |
| La Fuerza Del Buzo | Pocatello | 501(c)(3) | 2022 | $0 | $0 | 2026-01 |
| Lakefront Property Owners Environmental Association Inc | Spirit Lake | 501(c)(3) | 2014 | $0 | $0 | 2025-12 |
| Land To Sea Conservancy | Moyie Springs | 501(c)(3) | 2008 | $746,922 | 2024-12 | |
| Lava Lake Institute for Science and Conservation Inc | Hailey | 501(c)(3) | 2005 | $11,709 | 2024-12 | |
| Lifeafterbikes Inc | Hailey | 501(c)(3) | 2023 | $1,233 | 2025-12 | |
| Long Valley Garden Club of Idaho | McCall | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| Love the Wild Foundation Inc | Idaho Falls | 501(c)(3) | 2017 | $0 | $0 | 2025-12 |
| Lower Vance and Payne Ditch Company | Idaho Falls | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| Lucky Duck Foundation Inc | Salmon | 501(c)(3) | 2023 | $406,301 | 2025-12 | |
| Lugorico | Twin Falls | 501(c)(3) | 2023 | $0 | $0 | 2025-12 |
| Magic Valley Beekeepers Organization | Twin Falls | 501(c)(3) | 2017 | $0 | $0 | 2025-12 |
| Marsing Beautification Project | Marsing | 501(c)(3) | 2023 | $0 | $0 | 2025-12 |
| Mesa Park Irrigation Company | Fruitland | 501(c)(12) | 2019 | $0 | $0 | 2023-12 |
| Mid-Snake Resource Conservation and Development Council | Twin Falls | 501(c)(3) | 1996 | $0 | $0 | 2025-12 |
| Miners Ditch Company | Blackfoot | 501(c)(12) | 2026 | $0 | $0 | 2025-12 |
| Modie Park Conservancy | Lewiston | 501(c)(3) | 2016 | $93,744 | 2025-12 | |
| Moore Community Association Inc | Moore | 501(c)(3) | 2014 | $0 | $0 | 2025-12 |
| Northern Rockies Invasive Plant Council Inc | Moscow | 501(c)(3) | 2009 | $0 | $0 | 2024-12 |
| Northern Rockies Trail Project | Sandpoint | 501(c)(3) | 2026 | |||
| Not in Wilderness Coalition | Challis | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Oregon Trail Botanical Garden Foundation Inc | Burley | 501(c)(3) | 2001 | $0 | $0 | 2025-12 |
| Owyhee Cattlemans Heritage Foundation Inc | Murphy | 501(c)(3) | 2002 | $0 | $0 | 2025-12 |
| Owyhee Gardeners Inc | Caldwell | 501(c)(3) | 2019 | $0 | $0 | 2025-06 |
| Palouse Audubon Society Inc | Moscow | 501(c)(3) | 2005 | $0 | $0 | 2026-06 |
| Palouse Basin Water Summit Inc | Moscow | 501(c)(3) | 2017 | $0 | $0 | 2025-12 |
| Panhandle Nordic Club Inc | Hayden | 501(c)(3) | 2010 | $0 | $0 | 2025-05 |
| Panhandle Parks Foundation Inc | Coeur D Alene | 501(c)(3) | 2004 | $0 | $0 | 2025-12 |
| Payette Endowment Lands Alliance Inc | McCall | 501(c)(3) | 2021 | $0 | $0 | 2025-12 |
| Pipers Peak | Ketchum | 501(c)(3) | 2022 | $0 | $0 | 2025-12 |
| Polum Bolum Inc | Caldwell | 501(c)(3) | 2025 | $0 | $0 | 2024-12 |
| Portneuf Resource Council Inc | Pocatello | 501(c)(3) | 2022 | $0 | $0 | 2025-12 |
| Prairie Falcon Audubon | Twin Falls | 501(c)(3) | 2009 | $0 | $0 | 2025-12 |
| Priest River Valley Back Country Ho Rsemen Inc | Priest River | 501(c)(3) | 2026 | |||
| R B Sage Water Users Association | Middleton | 501(c)(12) | 2025 | $0 | $0 | 2025-12 |
| Resource Conservation and Information Institute Inc | Boise | 501(c)(3) | 2023 | $1.8 million | 2024-12 | |
| Rotary Earth Network | Boise | 501(c)(3) | 2026 | $0 | $0 | 2025-12 |
| Sacred Mountain Foundation | Pocatello | 501(c)(3) | 2002 | $214,761 | 2026-03 | |
| Salmon School Garden Project Inc | Salmon | 501(c)(3) | 2025 | |||
| Samaritians Gift Inc | Challis | 501(c)(3) | 2022 | $0 | $0 | 2025-12 |
| Sandpoint Transition Initiative Inc | Sandpoint | 501(c)(3) | 2009 | $0 | $0 | 2025-12 |
| Save the South Fork Salmon Inc | McCall | 501(c)(3) | 2020 | $0 | $0 | 2025-12 |
| Sawtooth Coalition | Stanley | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Silver Bee Community Garden | Kellogg | 501(c)(3) | 2014 | $0 | $0 | 2025-12 |
| Snake River Audubon Society | Idaho Falls | 501(c)(3) | 2001 | $0 | $0 | 2026-06 |
| Society for Ecologica Restoration - Great Basin Chapter | Boise | 501(c)(3) | 2015 | $0 | $0 | 2025-12 |
| Soda Springs Community Garden Inc | Soda Springs | 501(c)(3) | 2024 | $0 | $0 | 2024-12 |
| Soil Republic Inc | Cambridge | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| Southern Idaho Eastern Oregon Corrosion Committee | Boise | 501(c)(3) | 2015 | $0 | $0 | 2026-06 |
| Southwest Idaho Dahlia Society | Caldwell | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| Tavos Bicycle Shop | Boise | 501(c)(3) | 2023 | $0 | $0 | 2026-04 |
| Teton Valley Back Country Horsemen | Driggs | 501(c)(3) | 2022 | $0 | $0 | 2025-12 |
| The Idaho Association of Plant Pathology | Rupert | 501(c)(3) | 2011 | $0 | $0 | 2025-12 |
| The Idaho Society for Energy and Environmental Education | Boise | 501(c)(3) | 2000 | $0 | $0 | 2025-12 |
| The Idaho State Horticultural Society Inc | Caldwell | 501(c)(5) | 2014 | $0 | $0 | 2025-12 |
| The@adventurers Guild Inc | Post Falls | 501(c)(3) | 2026 | |||
| Timberline Booster Club Incorporated | Weippe | 501(c)(3) | 2014 | $0 | $0 | 2026-06 |
| Tom Evans Foundation | Coeur D Alene | 501(c)(3) | 2022 | $1.6 million | 2025-12 | |
| Tracking Talons Global Inc | Boise | 501(c)(3) | 2026 | |||
| Treasure Valley Beekeepers Club Fou Ndation Inc | Eagle | 501(c)(3) | 2026 | |||
| Trees Idaho Incorporated | Boise | 501(c)(3) | 2026 | |||
| Tvcgcoop Inc | Boise | 501(c)(3) | 2026 | |||
| Walking With Western Wildflowers Inc | Sagle | 501(c)(3) | 2021 | $0 | $0 | 2023-12 |
| Water Is Life Inc | Pocatello | 501(c)(3) | 2024 | |||
| Water Reuse Foundation Inc | Boise | 501(c)(3) | 2026 | |||
| Watershed Guardians Inc | Pocatello | 501(c)(3) | 2017 | $0 | $0 | 2025-12 |
| West Side Lateral | Payette | 501(c)(12) | 2018 | $0 | $0 | 2025-12 |
| Western Forest Insect Work Conference | Hayden | 501(c)(3) | 2000 | $0 | $0 | 2025-12 |
| Western Mining Preservation | Post Falls | 501(c)(3) | 2023 | $0 | $0 | 2025-12 |
| Wilderness History and Open Access Inc | Boise | 501(c)(3) | 2014 | $0 | $0 | 2025-12 |
| Wilderness Science Education Inc | McCall | 501(c)(3) | 2000 | $0 | $0 | 2025-12 |
| Wildlands Defense | Hailey | 501(c)(3) | 2014 | $0 | $0 | 2025-12 |
| Zero Waste Boise Institute Inc | Boise | 501(c)(3) | 2018 | $0 | $0 | 2023-12 |
Read from the IRS Exempt Organizations Business Master File, updated by the IRS on October 24, 2026 and rebuilt here every morning. Revenue and assets are from each organization's latest filing as the IRS lists it; the IRS record is the official one. Organizations only: no people are named on these pages.