| 1000 Friends of Iowa | Des Moines | C | $132K |
| Agriculture's Clean Water Alliance | Ankeny | C | $1.18M |
| Allamakee County Conservation | Lansing | D | $32K |
| Appanoose Conservation Foundation | Centerville | F | −$23K |
| Back to Ground Natural Burial | Iowa City | F | $9,154 |
| Benton County Conservation Foundation | Vinton | B | $124K |
| Brunswick-Topsham Land Trust Inc | Des Moines | C | $2.90M |
| Build a Better Belmond | Belmond | D | $1.70M |
| Carroll County Conservation | Carroll | C | $46K |
| Carter Lake Preservation Society Inc | Carter Lake | F | $36 |
| Cedar Valley Arboretum & Botanic | Waterloo | C | $300K |
| Cedar Valley Trails Partnership | Cedar Falls | B | $62K |
| Clean Energy Districts of Iowa | Decorah | D | $1.74M |
| Clinton County Conservation | Grand Mound | D | $298K |
| Conservation Foundation of Dickinson County | Okoboji | C | $6.44M |
| Dallas County Conservation Foundation | Perry | D | $81K |
| Deb and Jeff Hansen Foundation | WDM | F | $1.90M |
| Des Moines Chapter of the Izaak Walton League | Des Moines | B | $219K |
| Des Moines Founders Garden Club | WDM | C | $29K |
| Dickinson County Conservation Endowment Inc | Lake Park | A | $22K |
| Driftless Water Defenders | Iowa City | C | $86K |
| Dubuque Arboretum Association Inc | Dubuque | D | $660K |
| Dubuque County Gardeners Inc | Asbury | C | $5,203 |
| Earthmind Practice | Iowa City | B | $59K |
| Eastern Iowa Conservation Foundation | Dubuque | C | $271K |
| Energy Association of Iowa Schools | Creston | C | $238K |
| Five Island Trail Corporation | Emmetsburg | C | $92K |
| Forest City Enhancement | Forest City | D | $76K |
| Friends of Blood Run | Larchwood | C | $176K |
| Friends of Calkins Nature Area | Iowa Falls | D | $81K |
| Friends of Carlisle Parks Inc | Carlisle | C | $18K |
| Friends of Clay County Conservation | Spencer | F | $81K |
| Friends of Iowa County Conservation Foundation | Williamsburg | D | $12K |
| Friends of Jackson Co Conservation | Maquoketa | C | $102K |
| Friends of Lake Darling State Park | Brighton | D | $59K |
| Friends of Lake Panorama | Panora | C | $79K |
| Friends of Marshall County Conservation | Marshalltown | D | $21K |
| Friends of the Yellow River State | Harpers Ferry | C | $57K |
| Friends of Webster County | Fort Dodge | D | $116K |
| Friends of Winnebago County Conservation Found Inc | Forest City | C | $204K |
| Golden Hills Resource Conservation and Development | Oakland | A | $784K |
| Great March for Climate Action | Des Moines | F | $101K |
| Greater Des Moines Botanical Garden | Des Moines | D | $11.84M |
| Green Schools National Network Inc | Iowa City | D | $791K |
| Grindstone Lake Foundation Inc | Cedar Rapids | F | $14K |
| Growing Green Communities Inc | Des Moines | D | $5,033 |
| Holiday Lights at the Lake Inc | Coralville | B | $185K |
| Ida County Conservation Foundation | Ida Grove | C | $52K |
| Indian Creek Nature Center | Cedar Rapids | D | $1.92M |
| Indian Creek Nature Center Charitable | Cedar Rapids | F | $189K |
| Iowa Agriculture Water Alliance | Ankeny | B | $3.40M |
| Iowa Arboretum Inc | Madrid | C | $1.06M |
| Iowa Association for Energy Efficiency | Pleasant Hill | A | $70K |
| Iowa Business for Clean Energy | WDM | D | $527K |
| Iowa Confluence Water Trails | Des Moines | D | $10.43M |
| Iowa Conservation Education Coalition | Ackley | C | $11K |
| Iowa Division of the Izaak Walton League of America Inc | Des Moines | D | $107K |
| Iowa Environmental Council | Des Moines | A | $1.88M |
| Iowa Great Lakes Beautification Pro | Okoboji | D | $274K |
| Iowa Great Lakes Foundation | Des Moines | D | $280K |
| Iowa Interfaith Power and Light | Des Moines | B | $236K |
| Iowa Native Plant Society | Urbandale | C | $9,726 |
| Iowa Natural Heritage Foundation | Des Moines | B | $53.25M |
| Iowa Nutrient Research and Education | Des Moines | B | $1.10M |
| Iowa Recycling Association Incorporated | Davenport | B | $71K |
| Iowa Stormwater Education Partnership | Des Moines | C | $304K |
| Iowa Valley Resource Conservation & | Amana | B | $1.63M |
| Izaak Walton League of America Inc | Newton | C | $238K |
| Izaak Walton League of America Inc | Davenport | B | $98K |
| Izaak Walton League of America Inc Linn County | Cedar Rapids | C | $162K |
| Izaak Walton League Ottumwa Chapter | Ottumwa | D | $51K |
| Jefferson County Farmers and Neighbors | Fairfield | C | $119K |
| Keep Iowa Beautiful | Johnston | B | $614K |
| Keep Scott County Beautiful | Davenport | C | $16K |
| Leopold Landscape Alliance | Burlington | D | $67K |
| Limestone Bluffs Resource Conservation and Development Inc | Mechanicsvlle | C | $46K |
| Linn County Community Action Fund | Cedar Rapids | C | $53K |
| Mason City Foundation | Mason City | D | $909K |
| Muscatine Arboretum Association | Muscatine | B | $60K |
| N-Compass Inc | Marion | C | $169K |
| Nahant Marsh Education Center | Davenport | C | $1.44M |
| New Horizons Inc | New Hampton | C | $143K |
| Newton Arboretum and Botanical Gardens Inc | Newton | F | $506K |
| Northern Iowa River Greenbelt Assoc | Belmond | D | $37K |
| Pathfinders RC&D | Fairfield | A | $2.41M |
| Pella Garden Club Inc | Pella | C | $3,222 |
| Rathbun Land and Water Alliance | Centerville | D | $226K |
| Resource Conservation and | Postville | B | $1.18M |
| Shelby County Trails Board Inc | Harlan | F | $132K |
| Sioux County Conservation Foundation | Hawarden | F | $213K |
| Soil and Water Conservation Society | Ankeny | B | $1.44M |
| Southwest Iowa Nature Trails | Imogene | D | $352K |
| Sustainable Iowa Land Trust | West Branch | C | $539K |
| Swana Iowa Society of Solid Waste Operat | Storm Lake | A | $176K |
| Technical Services Providers | Ames | C | $6,740 |
| The Association for the Preservation of | Clear Lake | D | $19K |
| The Conservation Foundation of | Fairfield | C | $113K |
| The Federated Garden Clubs of Iowa | Knoxville | C | $25K |
| The Spirit of Okoboji | Okoboji | D | $2.57M |
| Trees Forever Inc | Marion | A | $3.66M |
| Water Professionals International | Urbandale | A | $3.67M |
| Waters Edge Nature Center Foundation | Algona | C | $23K |
| Whiterock Conservancy | Coon Rapids | C | $1.36M |
| William G Stowe Foundation | Des Moines | D | $618K |
| Winneshiek Energy District | Decorah | C | $170K |
| Woodbury Co Conservation Foundation | Sioux City | C | $137K |
| Worth County Conservation | Northwood | C | $46K |
Charity Clarity