| Sierra Forest Legacy | CA |
| Sierra Club, Missouri Chapter | MO |
| Sierra Club John Muir | WI |
| Sierra Club | DC |
| Shark Stewards | CA |
| Seattle Audubon Society | WA |
| Sea Turtle Conservancy | FL |
| Sea Shepherd Legal | WA |
| Save The Manatee | FL |
| SAVE THE FROGS! | CA |
| Save Our Wild Salmon | WA |
| Save Our Sky Blue Waters | MN |
| Save Our Allegheny Ridges | PA |
| Save Our Allegheny Ridges | PA |
| Save America's Forests | DC |
| Santa Fe Presbyterian Church | OK |
| Santa Barbara Urban Creeks Council | CA |
| SandyHook SeaLife Foundation | NJ |
| sandiegoeco.org | CA |
| San Bruno Mountain Watch | CA |
| Rumpf Law Offices | WI |
| Rogue Valley Audubon Society | OR |
| Rocky Mountain Wild | CO |
| Rockbridge Area Conservation Council | VA |
| Rock Creek Conservancy, Inc. | MD |
| Riverhead Foundation | NY |
| Restore the North Woods | ME |
| Restore Point Reyes Seashore | CA |
| Resource Renewal Institute | CA |
| Red Panda Network | OR |
| Raptor Research Foundation | WA |
| Rainforest Action Network | CA |
| R Mason Fine Arts | HI |
| Quality Parks | NY |
| Public Employees for Environmental Responsibility | MD |
| Project Coyote | CA |
| Primate Conservation Inc. | RI |
| Presbyterians for Earth Care | NC |
| Predator Defense | OR |
| Potomac Valley Audubon Society | WV |
| Planning and Conservation League & PCL Foundation | CA |
| Pilchuck Audubon Society | WA |
| Pike Assoc/Born Free USA | DC |
| Physicians for Social Responsibility | DC |
| Performing Animals Welfare Society | CA |
| People and Pollinators Action Network | CO |
| People and Carnivores | MT |
| Pennsylvania Wildlife Federation | PA |
| Pennsylvania Trout | PA |
| Pennsylvania Society for Ornithology | PA |
| Pennsylvania Society for Ornithology | PA |
| Pennsylvania Audubon | PA |
| PennEnvironment | PA |
| Pelican Island Audubon Society | FL |
| Pelecanus Inc | Long Beach, CA |
| Pegasus Foundation | MA |
| Peace and Justice Center | VT |
| Payne County Audubon Society | OK |
| Panthera | NY |
| Pandas International | CO |
| Pacific Rivers Council | OR |
| Oregon Wild | OR |
| Oregon Natural Desert Association | OR |
| Orange County People for Animals | CA |
| OneNature | MD |
| One World One Ocean | CA |
| Ohio Valley Environmental Coalition | WV |
| Oceana | DC |
| Ocean State Action | RI |
| Ocean Preservation Society | CA |
| Ocean Alliance | MA |
| NYC Plover Project | NY |
| NY4WHALES | NY |
| NRDC | DC |
| Northwest Center for Alternatives to Pesticides | OR |
| Northern Virginia Bird Alliance | VA |
| Northern Jaguar Project | AZ |
| Northern Flint Hills Audubon Society | KS |
| Northern California Council, Fly Fishers International | CA |
| Northern Alaska Environmental Center | AK |
| Northeast Pennsylvania Audubon Society | PA |
| North Coast Environmental Center | CA |
| North Central Washington Audubon Society | WA |
| North Cascades Conservation Council | WA |
| New York Turtle and Tortoise Society | NY |
| New York State Wildlife Rehabilitation Council | NY |
| New Jersey Environmental Lobby | NJ |
| New Jersey Audubon Society | NJ |
| New England Wildflower Society | MA |
| Nevada Wildlife Federation | NV |
| Neshaminy Creek Watershed Association | PA |
| Nature Abounds | PA |
| Natural Resources College, UW SP | WI |
| Natural Areas Association | PA |
| Native Plant Society of Oregon | OR |
| Native Plant Society of Oregon | OR |
| Native Plant Conservation Campaign | CA |
| National Wolfwatcher Coalition | MN |
| National Wildlife Refuge Association | DC |
| National Recreation & Parks Assoc | VA |
