Data / Nonprofits / Indiana / Environment
Environment nonprofits in Indiana: 531 registered with the IRS
531 environment nonprofits are registered with the IRS in Indiana, 456 of them 501(c)(3) charities; the 135 that report revenue took in $88.1 million. The most are in Indianapolis (86), Fort Wayne (19), South Bend (18). The largest by revenue: Keep Indianapolis Beautiful Inc ($8.4 million), Central Indiana Land Trust Incorporated ($7.2 million), Acres Inc ($6.9 million).
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The 500 largest by revenue
| Organization | City | Type | Since | Revenue | Assets | Filing |
|---|---|---|---|---|---|---|
| Keep Indianapolis Beautiful Inc | Indianapolis | 501(c)(3) | 1981 | $8.4 million | $17.6 million | 2025-12 |
| Central Indiana Land Trust Incorporated | Indianapolis | 501(c)(3) | 1991 | $7.2 million | $36.4 million | 2024-12 |
| Acres Inc | Huntertown | 501(c)(3) | 1961 | $6.9 million | $46.5 million | 2025-06 |
| Shirley Heinze Land Trust Inc | Valparaiso | 501(c)(3) | 2003 | $4.9 million | $25.3 million | 2024-12 |
| Venues Parks & Arts Foundation Inc | South Bend | 501(c)(3) | 2011 | $4.8 million | $4 million | 2024-12 |
| Wabash River Enhancement Corp | Lafayette | 501(c)(3) | 2005 | $4.1 million | $12.2 million | 2024-12 |
| Sycamore Land Trust Incorporated | Bloomington | 501(c)(3) | 1992 | $3 million | $27.9 million | 2025-06 |
| The Hoosier Environmental Council Inc | Indianapolis | 501(c)(3) | 1985 | $3 million | $4.5 million | 2025-06 |
| Niches Land Trust Inc | Lafayette | 501(c)(3) | 1996 | $2.7 million | $19.5 million | 2024-12 |
| Holliday Park Foundation Inc | Indianapolis | 501(c)(3) | 1991 | $2.6 million | $8.2 million | 2025-06 |
| Indiana Association of Soil & Water | Indianapolis | 501(c)(3) | 1970 | $2.6 million | $1.6 million | 2025-09 |
| Wellfield Botanic Gardens Inc | Elkhart | 501(c)(3) | 2005 | $2.2 million | $22.2 million | 2024-12 |
| Indiana Dunes Environmental Learning Center Inc | Chesterton | 501(c)(3) | 1998 | $2.1 million | $2.9 million | 2025-09 |
| Mud Creek Conservancy Inc | Indianapolis | 501(c)(3) | 1995 | $1.8 million | $2.9 million | 2024-12 |
| Drive Clean Indiana Inc | St John | 501(c)(3) | 1999 | $1.7 million | $837,033 | 2024-12 |
| Conservation Technology Information Center Inc | W Lafayette | 501(c)(3) | 2005 | $1.2 million | $483,987 | 2025-09 |
| Southern Indiana Cooperative Weed Management Area Inc | Bedford | 501(c)(3) | 2009 | $1.2 million | $326,628 | 2025-12 |
| Wawasee Area Conservancy Foundation Inc | Syracuse | 501(c)(3) | 1991 | $1.1 million | $10.5 million | 2025-12 |
| Earth Charter Indiana Inc | Indianapolis | 501(c)(3) | 2005 | $1 million | $583,591 | 2024-12 |
| Rapha Road Inc | Noblesville | 501(c)(3) | 2019 | $1 million | $860,963 | 2025-12 |
| Save the Dunes Conservation Fund Inc | Michigan City | 501(c)(3) | 1994 | $931,531 | $2.7 million | 2024-12 |
| Red-Tail Land Conservancy Inc | Muncie | 501(c)(3) | 1999 | $890,229 | $5.2 million | 2024-12 |
| Falls of the Ohio Foundation Inc | Clarksville | 501(c)(3) | 1987 | $869,761 | $2.1 million | 2025-12 |
| Shafer & Freeman Lakes Environmental Conservation | Monticello | 501(c)(3) | 1992 | $847,400 | $28.6 million | 2025-12 |
| Indiana Conservation Fund | Indianapolis | 501(c)(3) | 2024 | $813,748 | $724,111 | 2024-12 |
| Upper White River Watershed Alliance Inc | Indianapolis | 501(c)(3) | 1999 | $812,613 | $321,625 | 2024-12 |
| Clear Lake Township Land Conservancy Inc | Fremont | 501(c)(3) | 1992 | $808,623 | $6.4 million | 2025-12 |
| Tri-State Watershed Alliance Inc | Fort Wayne | 501(c)(3) | 2014 | $782,794 | $121,563 | 2024-12 |
| Indiana Forest Alliance Inc | Indianapolis | 501(c)(3) | 2014 | $768,420 | $150,590 | 2024-12 |
| Blue Heron Ministries Inc | Angola | 501(c)(3) | 2021 | $699,744 | $1.1 million | 2024-12 |
| A Place Called Home Residental Living Inc | Indianapolis | 501(c)(3) | 2022 | $699,473 | $699,473 | 2023-12 |
| Indiana Water Environment Association Inc | Indianapolis | 501(c)(3) | 1980 | $594,489 | $321,942 | 2024-12 |
| Indiana Audubon Society Inc | Connersville | 501(c)(3) | 1940 | $569,749 | $3.4 million | 2025-12 |
| Utilicast Foundation | Carmel | 501(c)(3) | 2021 | $492,049 | $633,977 | 2025-12 |
| Geist Lake Coalition Inc | Fishers | 501(c)(3) | 2012 | $476,769 | $252,507 | 2025-12 |
| Alliance of Hazardous Materials Professionals Inc | New Albany | 501(c)(3) | 1996 | $421,794 | $332,980 | 2025-12 |
| Zionsville Parks Foundation Inc | Zionsville | 501(c)(3) | 2021 | $419,589 | $451,994 | 2024-12 |
| Oxbow Inc | Lawrenceburg | 501(c)(3) | 1986 | $412,904 | $4.2 million | 2024-12 |
| Little River Wetlands Project Inc | Fort Wayne | 501(c)(3) | 1991 | $404,761 | $3.3 million | 2025-12 |
| Wesselman Park Nature Society Inc | Evansville | 501(c)(3) | 1973 | $396,745 | $1.3 million | 2024-12 |
| Indiana Society of Professional Land Surveyors Inc | Indianapolis | 501(c)(6) | 2014 | $391,540 | $527,852 | 2025-06 |
| Wawasee Property Owners Association Inc | Syracuse | 501(c)(3) | 2004 | $379,968 | $914,928 | 2025-12 |
| Lake George Conservancy Inc | Fremont | 501(c)(3) | 2004 | $374,299 | $3.4 million | 2025-12 |
| Berne Commuinity Development Corporation | Berne | 501(c)(3) | 2003 | $357,310 | $3.8 million | 2025-12 |
| Ouabache Land Conservancy Inc | Terre Haute | 501(c)(3) | 2010 | $327,599 | $1.1 million | 2024-12 |
| Greater Terre Haute Chamber of Commerce Foundation Inc | Terre Haute | 501(c)(3) | 1999 | $319,397 | $271,590 | 2024-12 |
| Lake Maxinkuckee Environmental Fund Inc | Culver | 501(c)(3) | 1983 | $311,736 | $1.8 million | 2024-12 |
| Greater Indiana Clean Cities Inc | Fort Wayne | 501(c)(3) | 2004 | $271,967 | $64,069 | 2024-12 |
| Lake Heritage Parks Foundation Inc | Crown Point | 501(c)(3) | 2012 | $268,674 | $2.9 million | 2025-12 |
| Urban Seeds Inc | Evansville | 501(c)(3) | 2008 | $256,671 | $291,411 | 2024-12 |
| Park Pals Inc | Newburgh | 501(c)(3) | 2018 | $246,881 | $442,602 | 2025-12 |
| Canopybloomington Inc | Bloomington | 501(c)(3) | 2021 | $238,248 | $125,906 | 2025-12 |
| Indiana Native Plant Society Inc | Indianapolis | 501(c)(3) | 1998 | $231,705 | $391,515 | 2025-12 |
| Keep Evansville Beautiful Inc | Evansville | 501(c)(3) | 1980 | $231,597 | $240,003 | 2025-09 |
| Warrick Parks and Trails Foundation Inc | Newburgh | 501(c)(3) | 2020 | $218,465 | $257,373 | 2025-12 |
| People for Urban Progress | Indianapolis | 501(c)(3) | 2009 | $215,173 | $95,822 | 2024-12 |
| Lake Tippecanoe Property Owners Inc | Leesburg | 501(c)(3) | 2009 | $213,152 | $194,167 | 2025-12 |
| Gnaw Bone Camp Nature Preserve Inc | Nashville | 501(c)(3) | 2004 | $208,430 | $7.6 million | 2025-12 |
| South Adams Trails Inc | Berne | 501(c)(3) | 2007 | $206,175 | $1.5 million | 2024-12 |
| Overland Expo Foundation | Indianapolis | 501(c)(3) | 2020 | $202,559 | $382,534 | 2024-12 |
| The Parks Foundation of Hendricks County Inc | Danville | 501(c)(3) | 2009 | $194,428 | $151,844 | 2025-12 |
| Rethink Inc | Terre Haute | 501(c)(3) | 2015 | $192,359 | $232,583 | 2025-12 |
| Wabash River Development &BEAUTIFICATION Inc | Terre Haute | 501(c)(3) | 2015 | $187,213 | $257,158 | 2024-12 |
| Friends of the White River Inc | Indianapolis | 501(c)(3) | 1986 | $176,679 | $177,785 | 2025-12 |
| Indiana Land Protection Alliance | Indianapolis | 501(c)(3) | 2016 | $176,095 | $114,061 | 2024-12 |
| Carbon Neutral Indiana Inc | Indianapolis | 501(c)(3) | 2022 | $160,571 | $31,273 | 2025-12 |
| American Daffodil Society Inc | Unionville | 501(c)(3) | 1959 | $159,863 | $561,978 | 2024-12 |
| Preservation of the Res Inc | Mishawaka | 501(c)(3) | 1977 | $157,155 | $374,131 | 2025-12 |
| Izaak Walton League of America Inc | Griffith | 501(c)(3) | 1954 | $150,530 | $99,505 | 2024-12 |
| Webster Lake Conservation Association Inc | North Webster | 501(c)(3) | 1993 | $146,219 | $95,348 | 2025-12 |
| Heartwood Incorporated | Paoli | 501(c)(3) | 1992 | $144,134 | $142,953 | 2025-12 |
| Indianapolis Garden Club | Indianapolis | 501(c)(3) | 1963 | $143,122 | $418,258 | 2025-06 |
| Friends of Lake Monroe Inc | Bloomington | 501(c)(3) | 2018 | $138,411 | $130,019 | 2025-12 |
| Center for Sustainable Living Inc | Bloomington | 501(c)(3) | 2020 | $137,853 | $209,194 | 2024-12 |
| Lake Monroe Water Fund Inc | Bloomington | 501(c)(3) | 2021 | $137,502 | $95,759 | 2024-12 |
| Greenways Foundation Inc | Indianapolis | 501(c)(3) | 1992 | $128,709 | $198,123 | 2024-12 |
| Downtown Danville Partnership Inc | Danville | 501(c)(3) | 2024 | $120,636 | $56,335 | 2025-12 |
| Farmland Conservation Club Inc | Farmland | 501(c)(3) | 1999 | $113,542 | $547,027 | 2025-12 |
| Lake Maxinkuckee Association Inc | Culver | 501(c)(3) | 2005 | $113,410 | $69,639 | 2025-12 |
| Brotherhood Designs Foundation Corporation | McCordsville | 501(c)(3) | 2025 | $111,105 | $23,481 | 2025-12 |
| Trees Inc | Terre Haute | 501(c)(3) | 2025 | $108,649 | $206,555 | 2025-12 |
| Friends of Indiana Dunes Inc | Beverly SHRS | 501(c)(3) | 1987 | $104,271 | $392,142 | 2024-12 |
| Anabaptist Climate Collaborative Inc | Goshen | 501(c)(3) | 2024 | $104,099 | $29,039 | 2025-06 |
| Sustainable Connexions International Inc | Indianapolis | 501(c)(3) | 2014 | $103,728 | $102,320 | 2025-12 |
| Wabash River Defenders Inc | N Manchester | 501(c)(3) | 2016 | $99,609 | $61,493 | 2025-12 |
| Southwestern Indiana Master Gardener Association Inc | Inglefield | 501(c)(3) | 2001 | $95,567 | $424,474 | 2025-12 |
| Lafayette Tree Fund Inc | Lafayette | 501(c)(3) | 1994 | $93,976 | $109,549 | 2025-12 |
| Amos W Butler Audubon Society | Indianapolis | 501(c)(3) | 1973 | $92,589 | $537,638 | 2025-08 |
| Earth Day Indiana Inc | Indianapolis | 501(c)(3) | 1992 | $90,880 | $10,367 | 2025-12 |
| Indiana Forestry and Woodland Owners Association Inc | W Lafayette | 501(c)(3) | 2026 | $88,976 | $308,579 | 2025-09 |
| Izaak Walton League of America Inc | Huntertown | 501(c)(3) | 1985 | $88,374 | $295,365 | 2025-12 |
| Morse Waterways Association Inc | Cicero | 501(c)(3) | 2009 | $83,590 | $6,831 | 2025-12 |
| Community Sustainability Project | Goshen | 501(c)(3) | 1998 | $76,652 | $75,084 | 2025-12 |
| Botanical Society of South Bend LTD | South Bend | 501(c)(3) | 2007 | $75,956 | $34,362 | 2024-12 |
| Walnut Council | W Lafayette | 501(c)(3) | 2000 | $75,772 | $1.9 million | 2024-12 |
| Oxbow of Indiana Inc | Lawrenceburg | 501(c)(3) | 1998 | $72,601 | $3.5 million | 2024-12 |
| Gary Advocates for Responsible Development Inc | Gary | 501(c)(3) | 2024 | $71,947 | $94,865 | 2025-12 |
| Indiana Karst Conservancy | Indianapolis | 501(c)(3) | 1986 | $71,877 | $1.9 million | 2025-12 |
| Steuben County Lakes Council Inc | Angola | 501(c)(3) | 1973 | $71,251 | $147,337 | 2025-12 |
| Prairie Winds Nature Farm Inc | Lakeville | 501(c)(3) | 2016 | $71,192 | $1 | 2025-12 |
| Patton Park Incorporated | Martinsville | 501(c)(4) | 2014 | $70,338 | $47,209 | 2025-12 |
| Syracuse Lake Association Inc | Syracuse | 501(c)(3) | 1998 | $68,213 | $143,875 | 2025-12 |
| Friends of Pumpkinvine Nature Trail Inc | Elkhart | 501(c)(3) | 1992 | $67,199 | $259,839 | 2025-06 |
| Noblesville Bridge of Flowers Inc | Noblesville | 501(c)(3) | 2022 | $66,733 | $105,760 | 2024-12 |
| Old Northside Foundation Inc | Indianapolis | 501(c)(3) | 1991 | $66,355 | $581,639 | 2025-12 |
| Marion County Wellfield Education Corporation | Indianapolis | 501(c)(3) | 1998 | $65,860 | $90,107 | 2025-12 |
| Big Lake Association Inc | Columbia City | 501(c)(3) | 2021 | $64,364 | $124,126 | 2025-12 |
| United Neighborhoods of Evansville Inc | Evansville | 501(c)(3) | 2001 | $63,749 | $75,110 | 2025-12 |
| Izaak Walton League of America Inc | Hobart | 501(c)(3) | 1985 | $56,339 | $125,110 | 2022-12 |
| Warsaw Biblical Gardens | Warsaw | 501(c)(3) | 2016 | $54,425 | $460,909 | 2024-12 |
| Friends of the Panhandle Pathway Inc | Winamac | 501(c)(3) | 2019 | $52,472 | $832,908 | 2025-12 |
| Lost River Foundation Inc | W Baden SPRGS | 501(c)(3) | 2015 | $51,833 | $19,458 | 2024-12 |
| Silver Lake - Kosciusko Co - Conservation Foundation | Avon | 501(c)(3) | 2019 | $49,100 | $343 | 2025-12 |
| C O Mollenhour Conservation Camp Council Inc | Warsaw | 501(c)(3) | 2001 | $49,079 | $171,671 | 2024-12 |
| Center Lake Conservation Association Inc | Warsaw | 501(c)(3) | 2002 | $46,443 | $156,743 | 2025-12 |
| Union Mills Conservation Club | Union Mills | 501(c)(3) | 1999 | $45,803 | $363,483 | 2025-12 |
| Laporte Area Lake Association Inc | La Porte | 501(c)(3) | 2026 | $45,137 | $87,907 | 2017-12 |
| Veterans Memorial Park Inc | Crawfordsvlle | 501(c)(3) | 2024 | $44,299 | $91,025 | 2025-12 |
| Friends of McCormicks Creek State Park Inc | Spencer | 501(c)(3) | 2012 | $42,841 | $71,130 | 2024-12 |
| Indiana Recycling Coalition Inc | Indianapolis | 501(c)(3) | 1991 | $40,875 | $33,025 | 2025-12 |
| Wood-Land-Lakes Resource Conservation and Development Inc | Middlebury | 501(c)(3) | 1995 | $35,530 | $460,575 | 2024-12 |
| Jay County Conservation Club | Portland | 501(c)(3) | 2026 | $15,778 | $54,522 | 2025-12 |
| Pennsy Trails of Hancock County Inc | New Palestine | 501(c)(3) | 2016 | $15,501 | $88,820 | 2025-12 |
| Alliance of Indiana Rural Waterfoundation Inc | Franklin | 501(c)(3) | 2007 | $14,685 | $76,857 | 2024-12 |
| Walnut Council Foundation Inc | W Lafayette | 501(c)(3) | 2014 | $13,973 | $150,432 | 2025-12 |
| Friends of the Ohio River Greenway Incorporated | Jeffersonvlle | 501(c)(3) | 2010 | $13,603 | $20,761 | 2024-12 |
| FCVCC Education and Training Inc | Markleville | 501(c)(3) | 2013 | $11,568 | $41,650 | 2024-12 |
| Snider Alumni Football Network | Fort Wayne | 501(c)(3) | 2023 | $11,546 | $5,815 | 2023-12 |
| Friends of the Parks of Allen County Indiana Inc | Fort Wayne | 501(c)(3) | 2001 | $10,532 | $42,568 | 2025-12 |
| Arrow Head Country Resource Conservation and Development Area | Winamac | 501(c)(3) | 1979 | $9,451 | $169,008 | 2024-12 |
| Big Turkey Lake Conservancy Incorporated | Lagrange | 501(c)(3) | 2023 | $5,579 | $56,963 | 2025-12 |
| Spencer Co Memorial Forest Association Inc | Fulda | 501(c)(5) | 2023 | $5,188 | $138,782 | 2025-12 |
| Friends of Richland | Richland | 501(c)(3) | 2009 | $3,259 | $7,500 | 2025-12 |
| Land Stewards of Indianapolis | Indianapolis | 501(c)(3) | 2022 | $1,461 | $1,861 | 2024-12 |
| Indiana Smallmouth Alliance Incorporated | Indianapolis | 501(c)(3) | 2024 | $663 | $2,576 | 2025-12 |
| 12 Points Revitalization Initiative Inc | Terre Haute | 501(c)(3) | 2019 | $0 | $0 | 2025-12 |
| 3LB Ventures Inc | South Bend | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| 3oe Foundation Inc | Carmel | 501(c)(3) | 2020 | $0 | $0 | 2024-12 |
| Ace Conservation & Educational Club Inc | Martinsville | 501(c)(3) | 2008 | $0 | $0 | 2025-12 |
| Aline and Edgar Igleheart Foundation Inc | Evansville | 501(c)(3) | 2015 | $90.1 million | 2025-12 | |
| Allen County Master Gardener Association Inc | Fort Wayne | 501(c)(3) | 2022 | $0 | $0 | 2025-12 |
| American Volkssport Association Inc | Brookville | 501(c)(3) | 1987 | $0 | $0 | 2026-06 |
| American Wildlife Land Conservancy Inc | Brownsburg | 501(c)(3) | 2022 | $160,556 | 2025-12 | |
| Americus Area Community Coalition | Lafayette | 501(c)(4) | 2013 | $0 | $0 | 2025-12 |
| Apex Energy Foundation Inc | Franklin | 501(c)(3) | 2025 | |||
| April & Jeff Sayre Fund for Nature | South Bend | 501(c)(3) | 2022 | $30,134 | 2025-12 | |
| April Pulley Sayre Legacy Foundation Inc | South Bend | 501(c)(3) | 2025 | $10,652 | 2025-12 | |
| Art Nature Consortium Incorporated | Indianapolis | 501(c)(3) | 2021 | $0 | $0 | 2025-12 |
| Art Remains | Bloomington | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| Artists for Climate Awareness | Bloomington | 501(c)(3) | 2022 | $0 | $0 | 2026-06 |
| Bartholomew County Conservation Council Inc | Columbus | 501(c)(3) | 1999 | $0 | $0 | 2025-12 |
| Bass Illinois Railroad Quiet Zone Company | Fort Wayne | 501(c)(3) | 2025 | $0 | $0 | 2024-12 |
| Batesville Beautification League Inc | Batesville | 501(c)(3) | 2012 | $0 | $0 | 2025-12 |
| Beautify Beech Grove Committee | Beech Grove | 501(c)(3) | 2014 | $0 | $0 | 2025-12 |
| Beautify the Block Corp | Indianapolis | 501(c)(3) | 2023 | $0 | $0 | 2025-05 |
| Beech Grove Community Parks Corporation | Beech Grove | 501(c)(3) | 2022 | $0 | $0 | 2025-12 |
| Benton County Conservation Club | Oxford | 501(c)(3) | 2026 | $0 | $0 | 2025-12 |
| Beverly Shores Environmental Restoration Group | Beverly SHRS | 501(c)(3) | 2004 | $0 | $0 | 2024-12 |
| Big Creek Wildlife Foundation Inc | Evansville | 501(c)(3) | 2025 | $350,438 | 2024-12 | |
| Big Oaks Conservation Society Incorporated | Madison | 501(c)(3) | 2003 | $0 | $0 | 2025-09 |
| Blackford Greenway Inc | Hartford City | 501(c)(3) | 2004 | $0 | $0 | 2023-12 |
| Blackwater Turtle Refuge Inc | Churubusco | 501(c)(3) | 2022 | $500 | 2025-12 | |
| Bloomington Indiana Grotto | Bloomington | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Blueggs Environmental Education LTD | Newburgh | 501(c)(3) | 2016 | $0 | $0 | 2025-12 |
| Boone County Invasives Cooperative Inc | Zionsville | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| Boone County Master Gardeners Inc | Lebanon | 501(c)(3) | 2022 | $0 | $0 | 2025-12 |
| Bottleless Nation Charitable Foundation Inc | Indianapolis | 501(c)(3) | 2024 | $3,789 | 2025-12 | |
| Branch Cisma | Shelbyville | 501(c)(3) | 2024 | $0 | $0 | 2024-12 |
| Branchville Conservation Club Inc | Branchville | 501(c)(3) | 2023 | $0 | $0 | 2025-12 |
| Bremen Conservation Club Inc | Bremen | 501(c)(3) | 2007 | $0 | $0 | 2025-12 |
| Brightwood Concerned Citizens Neighborhood Organization | Indianapolis | 501(c)(3) | 2021 | $0 | $0 | 2024-07 |
| Brown County Native Woodlands Project Inc | Nashville | 501(c)(3) | 2008 | $0 | $0 | 2024-12 |
| Brown Faces Green Spaces Inc | Gary | 501(c)(3) | 2022 | $0 | $0 | 2025-12 |
| Bullfork Wildlife Preserve | Oldenburg | 501(c)(3) | 2008 | $0 | $0 | 2024-12 |
| Calumet Heritage Partnership Incorporated | Porter | 501(c)(3) | 2001 | $0 | $0 | 2025-12 |
| Can Lady Project | Indianapolis | 501(c)(3) | 2014 | $0 | $0 | 2025-12 |
| Carl G Fisher Society Inc | Indianapolis | 501(c)(3) | 2014 | $0 | $0 | 2023-12 |
| Carmel Cleanup Crew | Carmel | 501(c)(3) | 2021 | $0 | $0 | 2024-12 |
| Carmel Green Initiative Inc | Carmel | 501(c)(3) | 2011 | $0 | $0 | 2025-12 |
| Cedar Lake Enhancement Association Inc | Cedar Lake | 501(c)(3) | 1997 | $0 | $0 | 2024-12 |
| Central Indiana Technical and Environmental Society Inc | Martinsville | 501(c)(3) | 1991 | $0 | $0 | 2025-12 |
| Chapman Lakes Foundation Inc | Warsaw | 501(c)(3) | 2001 | $0 | $0 | 2024-12 |
| Cicero Friends of the Park Inc | Cicero | 501(c)(3) | 2007 | $0 | $0 | 2025-12 |
| Coffee Creek Watershed Conservancy Inc | Chesterton | 501(c)(3) | 2000 | $8.7 million | 2025-12 | |
| Columbus Downtown Inc | Columbus | 501(c)(3) | 2010 | |||
| Conservation Easement Holding Trust Inc | Valparaiso | 501(c)(3) | 2022 | $0 | $0 | 2025-12 |
| Covered Bridge Gateway Trails Association Inc | Rockville | 501(c)(3) | 2011 | $0 | $0 | 2025-12 |
| Danielle Cares for Chairs | Carmel | 501(c)(3) | 2017 | $0 | $0 | 2025-04 |
| Darlington Conservation Club Inc | Darlington | 501(c)(3) | 2004 | $0 | $0 | 2025-12 |
| Dekalb County Indiana Trails Inc | Auburn | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| Dunes-Calumet Audubon Society Inc | Wheeler | 501(c)(3) | 1992 | $0 | $0 | 2025-06 |
| Eagle Creek Nature Conservancy and Preservation Inc | Indianapolis | 501(c)(3) | 1999 | $2.1 million | 2025-12 | |
| Eagle Creek Preservation Inc | Indianapolis | 501(c)(3) | 2026 | |||
| Eagle Island Channel Restoration Association Inc | Rome City | 501(c)(3) | 2022 | $0 | $0 | 2025-12 |
| East Central Indiana Recycling and Reuse Hub Corporation | Richmond | 501(c)(3) | 2025 | $0 | $0 | 2024-12 |
| East Central Section of the Air & Waste Management Association | Martinsville | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| Eastern Whitewater Valley Land Trust Inc | Centerville | 501(c)(3) | 2017 | $0 | $0 | 2023-12 |
| Echo Hollow Park Foundation Inc | Plainfield | 501(c)(3) | 2026 | |||
| Eci Community Development Corporation | Muncie | 501(c)(3) | 2025 | $0 | $0 | 2026-05 |
| Eci Economic Development Alliance Inc | Muncie | 501(c)(3) | 2023 | $0 | $0 | 2025-12 |
| Eco Fest Inc | Fort Wayne | 501(c)(3) | 2022 | $0 | $0 | 2025-12 |
| Efert | Elkhart | 501(c)(3) | 2023 | $0 | $0 | 2025-12 |
| Elkhart Dahlia Society Inc | Elkhart | 501(c)(3) | 2020 | $0 | $0 | 2024-12 |
| Energy Matters Community Coalitionincorporated | Columbus | 501(c)(3) | 2007 | $0 | $0 | 2025-12 |
| Environmental Coalition of Youth | West Harrison | 501(c)(3) | 2021 | $0 | $0 | 2025-12 |
| Evansville Lapidary Society Inc | Evansville | 501(c)(4) | 2014 | $0 | $0 | 2025-12 |
| Family Earthday Celebration | Fountain City | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Fawn River Restoration and Conservation Charitable Trust | Angola | 501(c)(3) | 2012 | $290,340 | 2025-12 | |
| Fish & Royer Lakes Association Inc | Lagrange | 501(c)(3) | 2019 | $0 | $0 | 2024-12 |
| Five Lakes Consevation Assoc Inc | Wolcottville | 501(c)(4) | 2013 | $0 | $0 | 2025-10 |
| Fort Wayne Swimming Booster Club Inc | Fort Wayne | 501(c)(3) | 2020 | $0 | $0 | 2025-12 |
| Fort Wayne Water Foundation Inc | Fort Wayne | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Foundation for Sustainable Futures | Lanesville | 501(c)(3) | 2023 | $0 | $0 | 2025-12 |
| Four Seasons House and Garden Club | Crown Point | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| Fox Lake Preservation Foundation | Angola | 501(c)(3) | 2020 | $0 | $0 | 2024-09 |
| Friends Group of Hardy Lake Inc | Scottsburg | 501(c)(3) | 2008 | $0 | $0 | 2023-10 |
| Friends of Blue Grass Fwa Inc | Evansville | 501(c)(3) | 2020 | $0 | $0 | 2025-12 |
| Friends of Brown County State Park | Nashville | 501(c)(3) | 1999 | $0 | $0 | 2025-12 |
| Friends of Charlestown State Park | Charlestown | 501(c)(3) | 2017 | $0 | $0 | 2025-12 |
| Friends of Clifty Falls State Park | Madison | 501(c)(3) | 2022 | $0 | $0 | 2025-12 |
| Friends of Falls Park Inc | Pendleton | 501(c)(3) | 2019 | $0 | $0 | 2025-12 |
| Friends of Harmonie State Park Inc | New Harmony | 501(c)(3) | 2012 | $0 | $0 | 2024-12 |
| Friends of Lieber Sra | Cloverdale | 501(c)(3) | 2018 | $0 | $0 | 2025-01 |
| Friends of Lye Creek Prairie Burn I NC | Crawfordsvlle | 501(c)(3) | 2026 | |||
| Friends of Marott Woods Nature Preserve | Indianapolis | 501(c)(3) | 2020 | $0 | $0 | 2024-12 |
| Friends of Metea | Grabill | 501(c)(3) | 1991 | $0 | $0 | 2025-12 |
| Friends of Mississinewa Lake Inc | Peru | 501(c)(3) | 2022 | $0 | $0 | 2024-12 |
| Friends of Oases Botanic Gardens | Gary | 501(c)(3) | 2023 | $1 | 2025-12 | |
| Friends of Ouabache State Park Inc | Bluffton | 501(c)(3) | 2015 | $0 | $0 | 2026-05 |
| Friends of Pokagon Inc | Angola | 501(c)(3) | 2019 | $0 | $0 | 2025-12 |
| Friends of Potawatomi Conservatories Inc | South Bend | 501(c)(3) | 2025 | |||
| Friends of Recycling Inc | Paoli | 501(c)(3) | 2023 | $0 | $0 | 2025-12 |
| Friends of Sugar Creek Inc | Crawfordsvlle | 501(c)(3) | 2024 | $0 | $0 | 2024-12 |
| Friends of Versailles State Park Incorporated | Dillsboro | 501(c)(3) | 2016 | $0 | $0 | 2026-03 |
| Friends of the Eel River Trail Inc | Columbia City | 501(c)(3) | 2007 | $0 | $0 | 2025-12 |
| Friends of the RBNP Inc | Bloomington | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Friends of the St Joe River | South Bend | 501(c)(3) | 1995 | $0 | $0 | 2026-03 |
| Friends of the Upper Wabash Interpretive Services Inc | Andrews | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| Friends of the Vincennes Parks | Vincennes | 501(c)(3) | 2023 | $0 | $0 | 2024-12 |
| Fugit Township Community Engagement Inc | Greensburg | 501(c)(3) | 2023 | $0 | $0 | 2025-12 |
| Garden Club If Indiana | Underwood | 501(c)(4) | 2011 | $0 | $0 | 2026-03 |
| Garden Club of Indiana | Carmel | 501(c)(4) | 2011 | $0 | $0 | 2026-03 |
| Garden Club of Indiana | Carmel | 501(c)(4) | 2011 | $0 | $0 | 2026-03 |
| Garden Club of Indiana | Indianapolis | 501(c)(4) | 2011 | $0 | $0 | 2026-03 |
| Garden Club of Indiana | Indianapolis | 501(c)(4) | 2011 | $0 | $0 | 2026-03 |
| Garden Club of Indiana | Indianapolis | 501(c)(4) | 2011 | $0 | $0 | 2026-03 |
| Garden Club of Indiana | Indianapolis | 501(c)(4) | 2011 | $0 | $0 | 2026-03 |
| Garden Club of Indiana | Indianapolis | 501(c)(4) | 2011 | $0 | $0 | 2026-03 |
| Garden Club of Indiana | Indianapolis | 501(c)(4) | 2011 | $0 | $0 | 2026-03 |
| Garden Club of Indiana | Indianapolis | 501(c)(4) | 2011 | $0 | $0 | 2026-03 |
| Garden Club of Indiana | Indianapolis | 501(c)(4) | 2011 | $0 | $0 | 2026-03 |
| Garden Club of Indiana | Richmond | 501(c)(4) | 2011 | $0 | $0 | 2026-03 |
| Garden Club of Indiana | Hobart | 501(c)(4) | 2011 | $0 | $0 | 2026-03 |
| Garden Club of Indiana | Marion | 501(c)(4) | 2011 | $0 | $0 | 2026-03 |
| Garden Club of Indiana | Marion | 501(c)(4) | 2011 | $0 | $0 | 2026-03 |
| Garden Club of Indiana | Marion | 501(c)(4) | 2011 | $0 | $0 | 2026-03 |
| Garden Club of Indiana | Columbus | 501(c)(4) | 2011 | $0 | $0 | 2026-03 |
| Garden Club of Indiana | Columbus | 501(c)(4) | 2011 | $0 | $0 | 2026-03 |
| Garden Club of Indiana | Valparaiso | 501(c)(4) | 2011 | $0 | $0 | 2026-03 |
| Garden Club of Indiana | Syracuse | 501(c)(4) | 2011 | $0 | $0 | 2026-03 |
| Garden Club of Indiana | Pittsboro | 501(c)(4) | 2011 | $0 | $0 | 2026-03 |
| Garden Club of Indiana | Chesterton | 501(c)(4) | 2011 | $0 | $0 | 2026-03 |
| Garden Club of Indiana | Elkhart | 501(c)(4) | 2011 | $0 | $0 | 2026-03 |
| Garden Club of Indiana | Elkhart | 501(c)(4) | 2011 | $0 | $0 | 2026-03 |
| Garden Club of Indiana | Crown Point | 501(c)(4) | 2011 | $0 | $0 | 2026-03 |
| Garden Club of Indiana | La Porte | 501(c)(4) | 2011 | $0 | $0 | 2026-03 |
| Garden Club of Indiana | Monrovia | 501(c)(4) | 2011 | $0 | $0 | 2026-03 |
| Garden Club of Indiana | Monrovia | 501(c)(4) | 2011 | $0 | $0 | 2026-03 |
| Garden Club of Indiana | Seymour | 501(c)(4) | 2011 | $0 | $0 | 2026-03 |
| Garden Club of Indiana | Santa Claus | 501(c)(4) | 2011 | $0 | $0 | 2026-03 |
| Garden Club of Indiana | Munster | 501(c)(4) | 2011 | $0 | $0 | 2026-03 |
| Garden Club of Indiana | Lebanon | 501(c)(4) | 2011 | $0 | $0 | 2026-03 |
| Garden Club of Indiana | Connersville | 501(c)(4) | 2011 | $0 | $0 | 2026-03 |
| Garden Club of Indiana | Sullivan | 501(c)(4) | 2011 | $0 | $0 | 2026-03 |
| Garden Club of Indiana | Pendleton | 501(c)(4) | 2011 | $0 | $0 | 2026-03 |
| Garden Club of Indiana | Peru | 501(c)(4) | 2011 | $0 | $0 | 2026-03 |
| Garden Club of Indiana | Winamac | 501(c)(4) | 2011 | $0 | $0 | 2026-03 |
| Garden Club of Indiana | Winamac | 501(c)(4) | 2011 | $0 | $0 | 2026-03 |
| Garden Club of Indiana | Princeton | 501(c)(4) | 2011 | $0 | $0 | 2026-03 |
| Garden Club of Indiana | Greensburg | 501(c)(4) | 2011 | $0 | $0 | 2026-03 |
| Garden Club of Indiana | Clayton | 501(c)(4) | 2011 | $0 | $0 | 2026-03 |
| Garden Club of Indiana Inc | Chesterton | 501(c)(4) | 2011 | $0 | $0 | 2026-03 |
| Garden Club of Indiana Inc | Winamac | 501(c)(3) | 2011 | $0 | $0 | 2026-03 |
| Garden Club of Indiana Inc | Montgomery | 501(c)(4) | 2011 | $0 | $0 | 2026-03 |
| Garden Club of Indiana Inc | Montgomery | 501(c)(4) | 2011 | $0 | $0 | 2026-03 |
| Garden Club of Indiana Inc | Monon | 501(c)(4) | 2011 | $0 | $0 | 2026-03 |
| Garden Club of Indiana Inc | Jonesboro | 501(c)(4) | 2011 | $0 | $0 | 2026-03 |
| Garfield Park Master Gardeners Association | Indianapolis | 501(c)(3) | 2024 | |||
| George Rogers Clark Land Trust Inc | Charlestown | 501(c)(3) | 2012 | $0 | $0 | 2025-12 |
| Gordon Gives | Kokomo | 501(c)(3) | 2026 | |||
| Great Lakes Habitat and Reforestation Alliance | New Haven | 501(c)(3) | 2025 | $0 | $0 | 2024-12 |
| Greater Olin Lake Conservancy Incorporated | Wolcottville | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Green Thumb Garden Club of Princeton Indiana | Princeton | 501(c)(3) | 2001 | $0 | $0 | 2025-12 |
| Greenfield Conservation Club Inc | Greenfield | 501(c)(3) | 2019 | $0 | $0 | 2025-12 |
| Grovertown Community Conservation Club | Walkerton | 501(c)(4) | 1986 | $0 | $0 | 2025-12 |
| Growth Foundation Inc | Indianapolis | 501(c)(3) | 2016 | $0 | $0 | 2025-12 |
| Guardians of the Garden Master Gardeners Inc | Washington | 501(c)(3) | 2020 | $0 | $0 | 2025-12 |
| Hamilton County Urban Conservation Association Inc | Fortville | 501(c)(3) | 2008 | $0 | $0 | 2025-12 |
| Hancock County Herb Society Inc | Greenfield | 501(c)(3) | 2003 | $0 | $0 | 2025-06 |
| Hancock County Master Gardener Association Inc | Greenfield | 501(c)(3) | 2016 | $0 | $0 | 2025-12 |
| Harrison County Native Habitat Alliance Inc | Corydon | 501(c)(3) | 2021 | $0 | $0 | 2025-12 |
| Hartman Arboretum Inc | Evansville | 501(c)(3) | 2002 | $1.5 million | 2025-12 | |
| Henderson Helping Hands Inc | Indianapolis | 501(c)(3) | 2025 | $0 | $0 | 2025-01 |
| Herb Society of Central Indiana- Unit Herb Society of America Inc | Indianapolis | 501(c)(3) | 2023 | $0 | $0 | 2025-07 |
| Hereford Lake Conservation Society | Madison | 501(c)(3) | 2016 | $0 | $0 | 2025-12 |
| Highland Firefighters Association | Highland | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Holy Ghost Haven Foundation Inc | South Bend | 501(c)(3) | 2023 | $0 | $0 | 2026-01 |
| Homes By Grace Development LLC | Gary | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| Hoosier Conservancy | Angola | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Hoosier Heartland Resource Conservation and Development Counc | Greenwood | 501(c)(3) | 1984 | $0 | $0 | 2025-12 |
| Hoosier Hikers Council Inc | Martinsville | 501(c)(3) | 1995 | $0 | $0 | 2025-12 |
| Hoosier Hills Prescribed Burn Assoc Iation | Washington | 501(c)(3) | 2026 | |||
| Hoosier Lakes Conservation | Indianapolis | 501(c)(3) | 2026 | |||
| Hoosier Organic Marketing Education Inc | Bloomington | 501(c)(3) | 1996 | $0 | $0 | 2023-12 |
| Hoosier Releaf Inc | Fort Wayne | 501(c)(3) | 1993 | $0 | $0 | 2025-12 |
| Hsi Solar Foundation | Indianapolis | 501(c)(3) | 2024 | |||
| Hudson Lake Conservation Association Inc | New Carlisle | 501(c)(3) | 2024 | $0 | $0 | 2024-12 |
| Huntington County Chapter of the Izaak Walton League of America | Huntington | 501(c)(3) | 2023 | $0 | $0 | 2025-12 |
| Huntington County Master Gardeners Inc | Huntington | 501(c)(3) | 2010 | $0 | $0 | 2025-12 |
| Il Quga A10 | Brownsburg | 501(c)(3) | 2022 | $0 | $0 | 2025-12 |
| Indian Creek Trail Inc | Corydon | 501(c)(3) | 2000 | $0 | $0 | 2025-12 |
| Indiana Association of Professional Soil Classifiers Inc | Hanover | 501(c)(6) | 2001 | $0 | $0 | 2024-12 |
| Indiana Cave Survey Inc | Indianapolis | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| Indiana Chapter of the Air & Waste Management Association Inc | Martinsville | 501(c)(3) | 2002 | $0 | $0 | 2025-12 |
| Indiana Climbers Coalition Inc | Bloomington | 501(c)(3) | 2022 | $0 | $0 | 2025-12 |
| Indiana Composting Council Inc | Carmel | 501(c)(3) | 2026 | $0 | $0 | 2025-12 |
| Indiana Daylily-Iris Society Inc | Greenwood | 501(c)(3) | 2002 | $0 | $0 | 2025-12 |
| Indiana Energy Independence Fund | Indianapolis | 501(c)(3) | 2024 | $0 | $0 | 2024-12 |
| Indiana Fury Fastpitch Corporation | Camby | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Indiana Lakes Management Society Inc | Angola | 501(c)(3) | 2018 | $0 | $0 | 2025-12 |
| Indiana National Road Association Inc | Indianapolis | 501(c)(3) | 1995 | $0 | $0 | 2025-12 |
| Indiana Organic Growers Inc | Tipton | 501(c)(3) | 2003 | $0 | $0 | 2025-12 |
| Indiana Parks Alliance Inc | Indianapolis | 501(c)(3) | 2014 | $0 | $0 | 2025-12 |
| Indiana Phenology Co | Carmel | 501(c)(3) | 2019 | $0 | $0 | 2025-12 |
| Indiana Sassafras Audubon Society | Bloomington | 501(c)(3) | 2013 | $0 | $0 | 2026-05 |
| Indiana Society of Professional Land Surveyors Inc | Indianapolis | 501(c)(6) | 2014 | $0 | $0 | 2025-06 |
| Indiana Society of Professional Land Surveyors Inc | Indianapolis | 501(c)(6) | 2014 | $0 | $0 | 2025-06 |
| Indiana Society of Professional Land Surveyors Inc | Indianapolis | 501(c)(6) | 2014 | $0 | $0 | 2025-06 |
| Indiana Society of Professional Land Surveyors Inc | Indianapolis | 501(c)(6) | 2014 | $0 | $0 | 2025-06 |
| Indiana Society of Professional Land Surveyors Inc | Indianapolis | 501(c)(6) | 2014 | $0 | $0 | 2025-06 |
| Indiana Society of Professional Land Surveyors Inc | Indianapolis | 501(c)(6) | 2014 | $0 | $0 | 2025-06 |
| Indiana Society of Professional Land Surveyors Inc | Indianapolis | 501(c)(6) | 2014 | $0 | $0 | 2025-06 |
| Indiana Society of Professional Land Surveyors Inc | Indianapolis | 501(c)(6) | 2014 | $0 | $0 | 2025-06 |
| Indiana Society of Professional Land Surveyors Inc | Indianapolis | 501(c)(6) | 2014 | $0 | $0 | 2025-06 |
| Indiana Society of Professional Land Surveyors Inc | Indianapolis | 501(c)(6) | 2014 | $0 | $0 | 2025-06 |
| Indiana Vector Control Association Plan Administrator | Indianapolis | 501(c)(3) | 2017 | $0 | $0 | 2025-12 |
| Indianapolis Hosta Society Inc | Indianapolis | 501(c)(3) | 1999 | $0 | $0 | 2025-12 |
| Indy Beta Inc | Indianapolis | 501(c)(3) | 2018 | $0 | $0 | 2025-12 |
| Internodes Inc | W Lafayette | 501(c)(3) | 2026 | |||
| Izaak Walton League of America Inc | Logansport | 501(c)(3) | 1985 | $0 | $0 | 2025-12 |
| Jefferson Street Park Inc | Nashville | 501(c)(3) | 2018 | $0 | $0 | 2025-12 |
| Johnson Co Garden Club | Franklin | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Kankakee Wetlands Organic Gardens Inc | South Bend | 501(c)(3) | 2014 | $0 | $0 | 2024-12 |
| Keep Brown County Beautiful | Nashville | 501(c)(3) | 2015 | $1 | 2025-12 | |
| Keep New Albany Clean and Green | New Albany | 501(c)(3) | 2011 | $0 | $3,552 | 2024-12 |
| Keep Noblesville Beautiful Inc | Noblesville | 501(c)(3) | 2021 | $0 | $0 | 2025-12 |
| Keep Stockwell Beautiful Inc | Stockwell | 501(c)(3) | 2008 | $0 | $0 | 2025-12 |
| Ken Craig Community Garden Inc | Knox | 501(c)(3) | 2017 | $0 | $0 | 2025-12 |
| Kennedy Park Neighborhood Associati On Inc | South Bend | 501(c)(3) | 2026 | $0 | $0 | 2021-12 |
| Kings and Riches Equestrian Team Inc | Crown Point | 501(c)(3) | 2019 | $0 | $0 | 2025-12 |
| Knobstone Hiking Trail Association Inc | Martinsville | 501(c)(3) | 2023 | $0 | $0 | 2025-12 |
| Knox County Cisma | Vincennes | 501(c)(3) | 2018 | $0 | $0 | 2025-12 |
| Kola Climate Tech Hub Inc | South Bend | 501(c)(3) | 2024 | |||
| Kosciusko Water & Woodland Invasive Partnership | North Webster | 501(c)(3) | 2021 | $0 | $0 | 2025-12 |
| Lafayette Place Improvement Assoc | Fort Wayne | 501(c)(4) | 1999 | $0 | $0 | 2025-12 |
| Lagrange County Lakes Council Inc | Lagrange | 501(c)(3) | 2003 | $0 | $0 | 2023-12 |
| Lagrange County Tourism Foundation Inc | Shipshewana | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Lake County Master Gardeners Association Inc | Crown Point | 501(c)(3) | 2011 | $0 | $0 | 2025-12 |
| Lake Freeman Ski Club Inc | Indianapolis | 501(c)(3) | 2022 | $1 | 2025-12 | |
| Lake Maxinkuckee Conservancy Foundation Inc | Culver | 501(c)(3) | 2012 | $0 | $0 | 2025-12 |
| Lake Papakeechie Sustainability Initiative Inc | Wakarusa | 501(c)(3) | 2017 | $1 | 2025-12 | |
| Lake of the Woods McClish Lake Property Owners Association | Hudson | 501(c)(3) | 2022 | $0 | $0 | 2025-12 |
| Land of Limestone Master Gardeners | Bedford | 501(c)(3) | 2015 | $0 | $0 | 2025-12 |
| Laporte County Conservation Trust Inc | Valparaiso | 501(c)(3) | 1996 | $0 | $0 | 2024-12 |
| Laporte County Master Gardener Association | La Porte | 501(c)(3) | 2003 | $0 | $0 | 2025-12 |
| Lawrence County Rock Club Inc | Loogootee | 501(c)(3) | 2014 | $0 | $0 | 2025-12 |
| Leopold Conservation Club | Leopold | 501(c)(7) | 2025 | |||
| Let It Grow | Indianapolis | 501(c)(3) | 2026 | $0 | $0 | 2025-12 |
| Lindas Unique Angels 2 Inc | Indianapolis | 501(c)(3) | 2023 | $0 | $0 | 2024-12 |
| Little Lake Maxinkuckee Association | Culver | 501(c)(3) | 2015 | $0 | $0 | 2025-12 |
| Little Turkey Lake Community Inc | Stroh | 501(c)(3) | 2023 | $0 | $0 | 2026-06 |
| Little Turkey Lake Conservation Club | Fort Wayne | 501(c)(3) | 2023 | $0 | $0 | 2025-12 |
| Little Turtle Waterway Corporation | Logansport | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| Live Free USA | Munster | 501(c)(3) | 2012 | $0 | $0 | 2025-12 |
| Loon Lake Property Owners Assoc | Columbia City | 501(c)(4) | 1999 | $0 | $0 | 2025-08 |
| Lost Creek Township Conservation Club Inc | Seelyville | 501(c)(4) | 2004 | $0 | $0 | 2025-12 |
| MR John Grigsbys Memorial Park Limited | Gary | 501(c)(3) | 2025 | |||
| Madison County Master Gardener Association Inc | Anderson | 501(c)(3) | 2000 | $0 | $0 | 2025-12 |
| Main Street Westport in | Westport | 501(c)(3) | 2020 | $0 | $0 | 2025-04 |
| Maries Learning Academy | Indianapolis | 501(c)(3) | 2024 | |||
| Marion County Master Gardener Association | Indianapolis | 501(c)(3) | 2001 | $0 | $0 | 2025-12 |
| Marshall County Chapter of the Izaak Walton League of America | Argos | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Marshall County Conservation Club Co | Plymouth | 501(c)(3) | 2019 | $0 | $0 | 2025-12 |
| Marshall County Lakes and Waters Council Inc | Bremen | 501(c)(3) | 2025 | $0 | $0 | 2021-12 |
| Martin Missions - Yard Work Inc | Noblesville | 501(c)(3) | 2024 | |||
| Master Gardeners of Montgomery County | Crawfordsvlle | 501(c)(3) | 2023 | $0 | $0 | 2025-12 |
| McCutchanville Garden Club Inc | Evansville | 501(c)(3) | 2013 | $0 | $0 | 2025-12 |
| Medora Brick Plant and Historical Sites Inc | Medora | 501(c)(3) | 2017 | $0 | $0 | 2024-12 |
| Messick Lake and River Front Association Inc | Wolcottville | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| Miami County Master Gardener Association | Peru | 501(c)(3) | 2015 | $0 | $0 | 2025-12 |
| Michiana Master Gardeners Association Inc | Goshen | 501(c)(3) | 2000 | $0 | $0 | 2025-12 |
| Michiana Watershed Incorporated | South Bend | 501(c)(3) | 2002 | $0 | $0 | 2026-01 |
| Midwest Hydrogen Corridor Coalition Inc | Bloomington | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Miller Garden Club | Gary | 501(c)(3) | 2014 | $0 | $0 | 2025-12 |
| Monon 16 Community Garden | Indianapolis | 501(c)(3) | 2018 | $0 | $0 | 2024-12 |
| Monroe County - Identify and Reduce Invasive Species Inc | Ellettsville | 501(c)(3) | 2021 | $0 | $0 | 2025-12 |
| Monumental Movement Community Development Corp | Indianapolis | 501(c)(3) | 2022 | $0 | $0 | 2025-12 |
| Moonsville Conservation Club Inc | Anderson | 501(c)(3) | 2014 | $0 | $0 | 2026-04 |
| Mudpuppy Palace Inc | Mount Vernon | 501(c)(3) | 2022 | $0 | $0 | 2025-12 |
| Muncie Clean City Inc | Muncie | 501(c)(3) | 1978 | $0 | $0 | 2025-12 |
| Myanmar Refugee Education Fund Inc | Muncie | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| National Association for Competitive Mounted Orienteering I | Milton | 501(c)(3) | 2017 | $0 | $0 | 2025-12 |
| National Road Heritage Trail Inc | Plainfield | 501(c)(3) | 2010 | $0 | $0 | 2025-12 |
| New Alsace Conservation Club Inc | Sunman | 501(c)(4) | 2012 | $0 | $0 | 2025-12 |
| New Ross Conservation Club Inc | New Ross | 501(c)(3) | 2014 | $0 | $0 | 2025-12 |
| Newark Cemetery Fund Co | Solsberry | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Niches Endowment Foundation Inc | Lafayette | 501(c)(3) | 2008 | $0 | $0 | 2024-12 |
| Nineveh Heritage Committee Inc | Nineveh | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Noble County Master Gardener Association Incorporated | Albion | 501(c)(3) | 2014 | $0 | $0 | 2025-12 |
| North Harbour Garden Club | Noblesville | 501(c)(4) | 2011 | $0 | $0 | 2026-03 |
| Ocean-Aquarium Foundation LTD | Indianapolis | 501(c)(3) | 2017 | $0 | $0 | 2024-12 |
| Ohio River Scenic Route of Southern Indiana Inc | Jeffersonvlle | 501(c)(3) | 2014 | $0 | $0 | 2023-12 |
| Old Homestead Preservation Society Inc | Crown Point | 501(c)(3) | 2004 | $0 | $0 | 2025-12 |
| Our World of Wildlife Inc | Portage | 501(c)(3) | 2018 | $0 | $0 | 2025-12 |
| Outdoor Intervention Inc | Plainfield | 501(c)(3) | 2022 | $0 | $0 | 2025-12 |
| Owen County Garden Club | Poland | 501(c)(3) | 2024 | $0 | $0 | 2024-12 |
| P & J Neighborhood Cleanup Inc | South Bend | 501(c)(3) | 2026 | |||
| P4C Paddle Club Inc | Warsaw | 501(c)(3) | 2016 | $0 | $0 | 2025-12 |
| People Have A Right To Clothes Inc | W Lafayette | 501(c)(3) | 2026 | |||
| People for Pollinators Inc | Indianapolis | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| Pine Canyon Lake Conservancy Inc | South Bend | 501(c)(3) | 2026 | |||
| Plastic Reduction Alliance Incorporated | Chesterton | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Porter County Master Gardeners Association | Valparaiso | 501(c)(3) | 2004 | $0 | $0 | 2025-12 |
| Porterco Conservation Trust Inc | Chesterton | 501(c)(3) | 2017 | $0 | $0 | 2025-12 |
| Potawatomi Audubon Society | Michigan City | 501(c)(3) | 2018 | $0 | $0 | 2024-12 |
| Preserve Indiana Trails | Paoli | 501(c)(3) | 2018 | $0 | $0 | 2025-12 |
| Pretty Lake Conservation Club Inc | Wolcottville | 501(c)(3) | 2004 | $0 | $0 | 2025-12 |
| Pritchett-Berg Family Woods Foundation | Lizton | 501(c)(3) | 2021 | $304,074 | 2025-12 | |
| Private Water Natural Resources Association Inc | Russiaville | 501(c)(3) | 2020 | $0 | $0 | 2023-12 |
| Prosper Garden Foundation Corp | Indianapolis | 501(c)(3) | 2023 | $6,520 | 2025-12 | |
| Protect Our Woods | Paoli | 501(c)(3) | 2026 | 2004-05 | ||
| Protected Lands | North Judson | 501(c)(3) | 2025 | $0 | $0 | 2024-12 |
| Putnam County Master Gardener Association | Greencastle | 501(c)(3) | 2016 | $0 | $0 | 2026-01 |
| Quiet Parks International | Valparaiso | 501(c)(3) | 2023 | $0 | $0 | 2025-12 |
| Raising Funds | Fort Wayne | 501(c)(3) | 2021 | $0 | $0 | 2025-03 |
| Randolph County Invasive Species Exterminators | Winchester | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Rangeline Conservation Club Inc | Clinton | 501(c)(3) | 2018 | $0 | $0 | 2025-12 |
| Recycle-Hk | Whitestown | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Recyclemania Inc | Muncie | 501(c)(3) | 2012 | $0 | $0 | 2025-12 |
| Remington-Wolcott Community Development Inc | Remington | 501(c)(3) | 2009 | $0 | $0 | 2025-12 |
| Renewable Hope Inc | Pendleton | 501(c)(3) | 2021 | $0 | $0 | 2025-12 |
| Renewable Revolt Incorporated | Hammond | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| Renewables for Community Empowerment Inc | Greenfield | 501(c)(3) | 2025 | $0 | $0 | 2024-12 |
| Rensselaer Urban Forestry Council Inc | Rensselaer | 501(c)(3) | 2011 | $0 | $0 | 2025-12 |
| Return To Vital Roots Inc | New Albany | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| Roanoke Beautification Foundation Inc | Roanoke | 501(c)(3) | 1999 | $0 | $0 | 2024-12 |
| Sage Valley Inc | Worthington | 501(c)(3) | 2019 | $3,540 | 2024-12 | |
| Saint Beatrice Heart for the World Inc | Peru | 501(c)(3) | 2010 | $0 | $0 | 2025-12 |
| San Pierre Parks & Recreation Society | San Pierre | 501(c)(3) | 2020 | $0 | $0 | 2025-12 |
| Sargent Road Association Foundation Inc | Indianapolis | 501(c)(3) | 2019 | $0 | $0 | 2024-12 |
| Save Baugo Bay | Osceola | 501(c)(3) | 2026 | |||
| Save Maumee Grassroots Organization Inc | Fort Wayne | 501(c)(3) | 2014 | $0 | $0 | 2025-12 |
| Science Barn Inc | South Bend | 501(c)(3) | 2016 | $0 | $0 | 2025-12 |
| Second Time Around Nwi | Highland | 501(c)(3) | 2026 | |||
| Shipshewana Community Lake Improvement Association Inc | Shipshewana | 501(c)(3) | 1995 | $0 | $0 | 2023-12 |
| Simonton Lake Area Homeowners Association Inc | Elkhart | 501(c)(4) | 2019 | $0 | $0 | 2025-12 |
| Simonton Lake Preservation Trust Inc | Elkhart | 501(c)(3) | 2013 | $0 | $0 | 2023-12 |
| Simple & Sensible Recycling Inc | Poland | 501(c)(3) | 2026 | |||
| Sisloff International Foundation | New Albany | 501(c)(3) | 2024 | |||
| Smalltown Garden Club | Anderson | 501(c)(4) | 2004 | $0 | $0 | 2025-02 |
| Solarize Indiana Inc | Indianapolis | 501(c)(3) | 2019 | $0 | $0 | 2026-03 |
| South Bend Greenway Conservancy | South Bend | 501(c)(3) | 2023 | $0 | $0 | 2025-12 |
| South Bend-Elkhart Bird Alliance Inc | Mishawaka | 501(c)(3) | 1951 | $0 | $0 | 2025-12 |
| South Central Indiana Master Gardener Association Inc | Columbus | 501(c)(3) | 2021 | $0 | $0 | 2025-12 |
| South Chain Szmanda Lake Association | South Bend | 501(c)(3) | 2020 | $0 | $0 | 2025-12 |
| Southeastern Indiana Beekeepers Association | Brookville | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| Southern Indiana Daylily Hosta Daffodil & Iris Society | Bloomington | 501(c)(3) | 2020 | $0 | $0 | 2025-12 |
| Southern Indiana Trailways Inc | Bedford | 501(c)(3) | 2020 | $0 | $0 | 2025-12 |
| Southern Whitewater Valley Land Trust | Centerville | 501(c)(3) | 2016 | $0 | $0 | 2023-12 |
| Southwestern Indiana Citizens for Quality of Life | Santa Claus | 501(c)(3) | 2020 | $0 | $0 | 2025-12 |
| Speaks for Trees and More | Roanoke | 501(c)(3) | 2023 | $0 | $0 | 2025-12 |
| Spinnaker Cove Nature Preserve and Conservation Area Inc | Indianapolis | 501(c)(3) | 2002 | $96,485 | 2025-03 | |
| St Joseph River Association Inc | Elkhart | 501(c)(3) | 2010 | $0 | $0 | 2025-12 |
| St Joseph River Valley Fly Fishers Club Inc | South Bend | 501(c)(3) | 2004 | $0 | $0 | 2025-12 |
| Steuben County Lakes Council Land Trust Inc | Angola | 501(c)(3) | 2007 | $0 | $0 | 2025-12 |
| Steuben County Master Gardener Association Inc | Angola | 501(c)(3) | 2017 | $0 | $0 | 2025-12 |
| Still Waters Land Trust Inc | Avon | 501(c)(3) | 2022 | $23,426 | 2025-12 | |
| Stockbridge Audubon Society Inc | Fort Wayne | 501(c)(3) | 2015 | $0 | $0 | 2026-06 |
| Stone Lake Conservation Club Inc | Middlebury | 501(c)(3) | 2012 | $0 | $0 | 2025-12 |
| Streets of Monticello Association Inc | Monticello | 501(c)(3) | 2018 | $0 | $0 | 2025-12 |
| Sunnyside Master Gardener Association of Southern Indiana | New Albany | 501(c)(3) | 2011 | $0 | $0 | 2025-12 |
| Sustainable Earth Inc | Lafayette | 501(c)(3) | 1991 | $0 | $0 | 2023-12 |
| Sycamore Audubon Society | W Lafayette | 501(c)(3) | 2001 | $0 | $0 | 2024-12 |
| The Bloomington Garden Club | Bloomington | 501(c)(4) | 2014 | $0 | $0 | 2025-08 |
| The Garden Club of Indiana Inc | Indianapolis | 501(c)(4) | 2011 | $0 | $0 | 2026-03 |
| The Indiana Flower Growers Association | W Lafayette | 501(c)(5) | 2017 | $0 | $0 | 2024-12 |
| Thistle & Timber Foundation Inc | Westville | 501(c)(3) | 2025 | |||
| Tippecanoe Lake Trails Inc | Leesburg | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Traders Point Environmental Renewal Inc | Indianapolis | 501(c)(3) | 2021 | $0 | $0 | 2024-12 |
| Trees Indiana Inc | Fort Wayne | 501(c)(3) | 2007 | $0 | $0 | 2026-01 |
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.