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Data / Nonprofits / Tennessee / Environment

Environment nonprofits in Tennessee: 784 registered with the IRS

784 environment nonprofits are registered with the IRS in Tennessee, 776 of them 501(c)(3) charities; the 112 that report revenue took in $613.1 million. The most are in Memphis (450), Nashville (49), Knoxville (32). The largest by revenue: Ducks Unlimited Inc ($380.3 million), Ducks Unlimited Inc ($65.8 million), Highlander Research & Education Center Inc ($24.2 million).

SpecStream is the live web data engine for teams and agents. It reads the IRS register of exempt organizations as the IRS updates it, and this page is that reading. Ask for the nonprofits you need by place, cause and size, with their latest Form 990 figures and websites, and they arrive in your sheet, CRM, Slack or agent.

The 500 largest by revenue

OrganizationCityTypeSinceRevenueAssetsFiling
Ducks Unlimited IncMemphis501(c)(3)1956$380.3 million$449.9 million2025-06
Ducks Unlimited IncMemphis501(c)(3)1956$65.8 million$02025-06
Highlander Research & Education Center IncNew Market501(c)(3)1963$24.2 million$38 million2025-09
Wetlands America Trust IncMemphis501(c)(3)1985$19.5 million$201 million2025-06
Sevier Solid Waste IncPigeon Forge501(c)(3)1989$11.1 million$45.6 million2025-06
Cumberland River Compact IncNashville501(c)(3)1998$9.6 million$35.9 million2025-03
Southern Conservation CorpMcMinnville501(c)(3)2003$8 million$36 million2025-12
Tennessee Wildlife Federation IncorporatedNashville501(c)(3)1951$6.6 million$7.4 million2025-06
Southern Alliance for Clean EnergyKnoxville501(c)(3)1985$5.4 million$12 million2025-12
Land Trust for Tennessee IncNashville501(c)(3)1999$5 million$26.7 million2025-03
Union Sportsmens AllianceSpring Hill501(c)(3)2013$4.9 million$6.3 million2024-12
Tennessee State Parks ConservancyNashville501(c)(3)2021$4.8 million$5.2 million2025-06
Memphis Botanic Garden Foundation IncMemphis501(c)(3)1972$4.8 million$18.4 million2025-06
Saving Nature IncKnoxville501(c)(3)2019$4.8 million$1.9 million2025-12
Friends of Radnor LakeNashville501(c)(3)1973$4.6 million$6.5 million2025-06
Clinch-Powell Resource Conservation and Development AreRutledge501(c)(3)1990$4.4 million$9.1 million2025-09
Tennessee River Gorge Trust IncChattanooga501(c)(3)1986$3.8 million$26.6 million2024-12
Great Smoky Mountain InstituteTownsend501(c)(3)2001$3.3 million$9.7 million2025-07
Wolf River Conservancy IncMemphis501(c)(3)1985$3.2 million$23.2 million2024-12
Ijams Nature Center IncKnoxville501(c)(3)1978$2.6 million$4.9 million2024-12
Appalachian-Northeast Tenn Resource Conservation and Development CouncJohnson City501(c)(3)1995$2.5 million$1.5 million2025-12
Reflection Riding Arboretum and Nature CenterChattanooga501(c)(3)1978$2.5 million$7.7 million2024-12
East Tennessee Clean Fuels CoalitionKnoxville501(c)(3)2026$2.4 million$1.1 million2025-09
Harpeth ConservancyBrentwood501(c)(3)2000$1.9 million$1.7 million2025-03
American Mathematical Association of Two Year Colleges IncMemphis501(c)(3)1991$1.5 million$2.6 million2024-12
Tennessee Environmental CouncilNashville501(c)(3)1975$1.3 million$352,9812024-12
Foothills Land ConservancyRockford501(c)(3)1986$1.3 million$19.8 million2025-12
Big River Park ConservancyMemphis501(c)(3)2021$1.2 million$1.3 million2024-12
GreenspacesChattanooga501(c)(3)2011$1.2 million$319,2772024-12
Franklin S Charge IncFranklin501(c)(3)2005$1.1 million$6.7 million2025-12
Conservation Fisheries IncKnoxville501(c)(3)1993$1.1 million$1.1 million2025-09
Knoxville Botanical Gardens and ArboretumKnoxville501(c)(3)2002$1 million$3 million2024-12
Gulf and Caribbean Fisheries Institute IncPiney Flats501(c)(3)2022$874,150$331,6662025-09
Lookout Mountain ConservancyChattanooga501(c)(3)1992$859,030$3.8 million2024-12
Protect Our AquiferMemphis501(c)(3)2019$858,907$1.6 million2025-12
Statewide Organizing for Community Empowerment Resource ProjectKnoxville501(c)(3)1984$844,141$541,6912024-12
Friends of Shelby Park IncNashville501(c)(3)2008$801,405$2.8 million2025-12
Southeastern Cave Conservancy IncSignal MTN501(c)(3)1991$717,482$6.3 million2026-04
Urban Green LabNashville501(c)(3)2011$696,565$288,6562025-12
Friends of Mill Ridge ParkAntioch501(c)(3)2017$672,904$1.6 million2024-12
Young Gifted & GreenMemphis501(c)(3)2019$606,981$775,9342025-08
Metro Nashville Parks FoundationNashville501(c)(3)2016$595,781$1.5 million2025-12
Trees KnoxvilleKnoxville501(c)(3)2017$533,475$144,0602025-12
Rock the Ocean FoundationNashville501(c)(3)2013$507,888$431,3972024-12
One Million WellsMemphis501(c)(3)2017$477,412$272,1842024-12
Keep the Tennessee River BeautifulKnoxville501(c)(3)2018$453,131$255,7892024-06
WaterwaysChattanooga501(c)(3)2004$446,192$357,0032024-12
Keep Knoxville Beautiful IncKnoxville501(c)(3)1980$412,096$413,9952025-06
Chattanooga Audubon SocietyChattanooga501(c)(3)1954$384,523$1 million2025-12
Tennessee Advanced Energy Business CouncilKnoxville501(c)(3)2014$378,450$78,9182024-12
Discover Life in America IncGatlinburg501(c)(3)2000$360,833$328,2042025-12
City GrazingBristol501(c)(3)2017$353,251$177,8982024-12
Tennessee Wildlife Officers AssociationJoelton501(c)(4)2012$351,059$202,0092025-06
Tennessee Forestry Foundation IncNashville501(c)(3)2022$326,330$13,3872024-12
Run4waterCastalin SPGS501(c)(3)2012$313,316$156,8882025-12
Green Interchange IncNashville501(c)(3)2020$245,355$12,3192025-12
Rural Resources IncorporatedGreeneville501(c)(3)1994$234,593$804,6962024-12
Friends of South Cumberland State ParkMonteagle501(c)(3)1994$224,177$649,2322025-06
Spring Hill Little LeagueSpring Hill501(c)(3)2022$206,509$220,2472025-09
Narrow Ridge CenterWashburn501(c)(3)1992$189,012$760,0882024-12
Black Bear Solar Institute CorporationJohnson City501(c)(3)2011$180,072$901,2702025-12
Little Garden Club of MemphisMemphis501(c)(3)1982$163,468$462,3402025-05
American Friends of Durrell Wildlife Conservation Trust IncMemphis501(c)(3)2014$157,190$86,5212024-12
The Garden Club of NashvilleNashville501(c)(3)1983$153,758$343,4542025-06
Hardwood Forest Foundation IncCollierville501(c)(3)1991$152,174$88,7182024-12
Center for A Holistic EcologyHohenwald501(c)(3)2004$149,657$89,4042025-12
256 FoundationNashville501(c)(3)2024$134,718$109,0162024-12
Tennessee Federation of Garden Clubs IncKnoxville501(c)(3)1970$134,331$833,0352026-03
Tennessee Urban Forest CouncilNashville501(c)(3)1995$133,704$43,3422024-12
Nashville Tree Conservation CorpsNashville501(c)(3)2020$128,866$223,0652025-12
Friends of Lick CreekNashville501(c)(3)2023$128,763$59,9202024-12
Keep Blount BeautifulAlcoa501(c)(3)1992$128,165$186,8792025-06
Tennessee Naturalist ProgramNashville501(c)(3)2012$117,702$103,5392025-12
Sowing JusticeMemphis501(c)(3)2025$110,551$3,9422021-12
Middle-West Tennessee Clean Fuels CoalitionKnoxville501(c)(3)2011$109,288$97,1412025-09
Horticultural Society of Middle TennesseeNashville501(c)(3)1985$106,729$42,6582026-03
Friends of Seven Islands State Birding Park IncKnoxville501(c)(3)2015$99,546$152,7322025-12
Oak Ridge Environmental Peace AllianceOak Ridge501(c)(3)2000$98,006$104,1852025-06
Short Mt SanctuaryLiberty501(c)(3)2001$94,945$404,3932023-12
Fuqua Head Memorial Event IncSpringfield501(c)(3)2023$92,489$25,4892025-12
Knoxville Garden Club IncKnoxville501(c)(3)1969$90,115$266,5342025-06
Tennessee Weed Science SocietyKnoxville501(c)(3)2014$79,950$36,7382025-12
Garden Club of Lookout MountainLookout MTN501(c)(3)1973$72,868$177,8132025-06
Smoky Mountains Hiking Club IncorporatedKnoxville501(c)(3)2000$72,044$656,3182025-12
Swan Conservation TrustSummertown501(c)(3)1994$71,293$1.8 million2025-12
Water for Africa IncFranklin501(c)(3)2022$70,538$2,7082025-12
Cleveland-Bradley Kab IncCleveland501(c)(3)1991$70,080$70,9372025-06
Southeast Tennessee Resource Conservation and Development AssocCleveland501(c)(3)1975$68,146$73,1872024-12
Montgomery County Conservation ClubClarksville501(c)(3)2007$67,462$292,0162024-12
Friends of the Cumberland TrailPikeville501(c)(3)2006$64,864$230,9352025-12
McMinn County High School Band Booster AssociationAthens501(c)(3)2025$60,945$17,4672025-06
Parks & Recreation Foundation of Sevierville IncSevierville501(c)(3)2021$55,980$68,2762025-06
Herb Society of NashvilleNashville501(c)(3)1989$55,694$199,4782025-06
Duck River Conservancy IncNashville501(c)(3)2024$54,864$10,0752025-12
Friends of Warriors Path State Park IncKingsport501(c)(3)2022$54,012$63,9842025-06
Foundation for Environmental Agriculture EducationVonore501(c)(3)1994$51,060$394,1262025-12
Memphis Garden ClubMemphis501(c)(3)1968$47,795$144,5762025-06
Friends of the TrailsCrossville501(c)(3)2015$46,913$60,1812025-12
Keep Morristown Hamblen BeautifulMorristown501(c)(3)2017$44,449$85,2192025-06
Friends of Fall Creek Falls State ParkSpencer501(c)(3)1996$41,229$151,5272024-12
Blue Ridge Guide AssociationBristol501(c)(3)2022$26,678$20,9592025-12
Perennial Plant Society ofNashville501(c)(3)2000$26,150$101,6232025-12
Tennessee Off Road ConservationLebanon501(c)(3)2021$18,989$11,2012024-12
Seeds of Growth IncClarksville501(c)(3)2025$10,738$4,3232025-12
Five Rivers Resource Conservation and Development AssociationSpringfield501(c)(3)1992$8,343$35,1422025-12
Obed Watershed Community AssociationCrossville501(c)(3)2005$7,813$137,3822025-12
Friends of Cove Lake State Recreational Park IncCaryville501(c)(3)1997$7,312$53,2412025-12
Responsible Stewardship IncHarriman501(c)(3)2022$3,710$52,1272025-12
Sawyer Mason FoundationFriendsville501(c)(3)2022$3,623$21,0152024-12
Citizens for Brentwood Green Space IncBrentwood501(c)(3)2005$2,606$16,3032025-12
United To Protect the PlateauMonteagle501(c)(3)2020$600$14,4192025-12
3 Rivers WoodDel Rio501(c)(3)2025
A Way Up Community OrganizationNashville501(c)(3)2025
Advocates for the Oak Ridge ReservationOak Ridge501(c)(3)2002$0$02025-12
American Public Energy Consortium IncMemphis501(c)(3)2021$0$02025-12
Ana-GenesisBartlett501(c)(3)2023$0$02025-12
Annas Honey HeartChattanooga501(c)(3)2026
Appalachian Center for the Environm EntChattanooga501(c)(3)2026
Appalachian Conservation Institute LLCChattanooga501(c)(3)2024$6.2 million2025-12
Appalachian Farm Arts Heritage FoundationMosheim501(c)(3)2025$0$02025-12
Appalachian Foothills Fruits and NutsCleveland501(c)(3)2021$0$02025-12
Auburntown Historical SocietyAuburntown501(c)(3)2010$0$02024-12
Backwater Gardens Lake Maintenance Association IncMemphis501(c)(3)2015$0$02025-12
Bells Bend Conservation CorridorNashville501(c)(3)2014$0$02025-12
BetternatureCollierville501(c)(3)2024$0$02025-04
Big Fork Historical CemeteryChattanooga501(c)(3)2023$0$02025-12
Blount County Master GardenersMaryville501(c)(3)2022$0$02025-12
Boone Watershed Partnership IncMilligan501(c)(3)2007$0$02025-12
Branches of Hope IncRogersville501(c)(3)2026$0$02025-12
Braxton Lee Homestead Foundation IncAshland City501(c)(3)2019$0$02024-12
Bruno and Selma Gernt Foundation IncAllardt501(c)(3)2024$12024-12
Buffalo-Duck River Resource Conservation & Development AssociationCenterville501(c)(3)1994$0$02026-03
Build for BeesKnoxville501(c)(3)2021$8,1992025-12
Cadeau VertKnoxville501(c)(3)2023$0$02025-12
Camden Cal RipkinCamden501(c)(3)2026
Cannon Events AssociationWoodbury501(c)(3)2022$0$02024-12
Centervillegarden ClubCenterville501(c)(5)2018$0$02025-12
Chattanooga Aquatic Project and Personal DevelopmentChattanooga501(c)(3)2020$0$02024-12
Chattanooga Botanical GardenChattanooga501(c)(3)2025
Chattanooga Food Forest CoalitionChattanooga501(c)(3)2026
Cheatham County Master Gardeners IncAshland City501(c)(3)2019$0$02025-12
Cherokee Forest Voices IncJohnson City501(c)(3)2014$0$02025-12
Cherokee Lake Users AssociationTalbott501(c)(3)2014$0$02025-12
Cherokee Removal Park - Blythe Ferry IncBirchwood501(c)(3)2011$0$02025-12
Chickasaw Gardens Greentrees IncMemphis501(c)(3)1998$0$02025-12
Citizens for Clean Air Water and FoodSummertown501(c)(3)2020$0$02025-12
Clean Water Expected in East TennesseeCosby501(c)(3)2013$0$02024-10
Climate Wise IncNashville501(c)(3)2026$0$02025-12
Coal Creek Watershed Foundation IncKnoxville501(c)(3)2001$181,9562025-12
Columbia Dam NowColumbia501(c)(3)2025$0$02025-12
Community Beautification & Improvement ProjectSoddy Daisy501(c)(3)2021$0$02025-12
Congressional Energy Engagement FoundationOoltewah501(c)(3)2023$0$02023-12
Connected GardensStraw Plains501(c)(3)2026
Cooper Young Garden ClubMemphis501(c)(3)2020$0$02025-12
Coro Lakes Preservation SocietyCordova501(c)(3)2021$203,4672025-06
Covington Pike Association IncMemphis501(c)(3)2017$12025-12
Cultivate WholenessKnoxville501(c)(3)2018$0$02025-12
Cumberland ClearOneida501(c)(3)2025$0$02025-12
Cumberland County Master Gardeners IncCrossville501(c)(3)2020$0$02025-12
Cumberland-Harpeth Audubon Society C/o Frances DuvallNashville501(c)(3)1994$0$02026-06
Darksky TennesseeBartlett501(c)(3)2025$0$02025-12
Deep Culture IncNashville501(c)(3)2020$0$02024-06
Dolan Gardens FoundationSignal MTN501(c)(3)1997$169,1992025-12
Drakes Creek Watershed FoundationHendersonvlle501(c)(3)2026
Duck River Watershed Education Committee IncShelbyville501(c)(3)2011$0$02026-06
Duck River Watershed Society IncManchester501(c)(3)2021$0$02025-12
Duck Unlimited IncMemphis501(c)(3)1956
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Ducks Unlimited IncMemphis501(c)(3)1956
Ducks Unlimited IncMemphis501(c)(3)1956
Ducks Unlimited IncMemphis501(c)(3)1956
Ducks Unlimited IncMemphis501(c)(3)1956
Ducks Unlimited IncMemphis501(c)(3)1956

Every nonprofit in Tennessee

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.