| Madison Audobon | WI |
| Lutheran School of Theology at Chicago | IL |
| Long Island Pine Barrens Society | NY |
| Lone Tree Council | MI |
| Lobos of the Southwest | AZ |
| League of Women Voters of the US | DC |
| League of Conservation Voters | DC |
| Last Chance Audubon Society | MT |
| Large Carnivore Fund | MT |
| Larch Company | DC |
| LandWatch Monterey County | CA |
| Lake Champlain Committee | VT |
| KS Wild | OR |
| Key West Wildlife Center | FL |
| Key Deer Protection Alliance | FL |
| Kettle Range Conservation Group | WA |
| Kentucky Heartwood | KY |
| Kalmiopsis Audubon Society | OR |
| Juniata Valley Audubon Society | PA |
| Juniata Valley Audubon Society | PA |
| John Muir Project of Earth Island Institute | CA |
| John G. Shedd Aquarium | IL |
| Jane Goodall Institute for Wildlife Research | VA |
| Jackson Hole Conservation Alliance | WY |
| Izaak Walton League, Rapid City, South Dakota Chapter | SD |