| Organization | Address | State / Province | |
|---|---|---|---|
| Tortoise Group | NV Map It | NV | |
| Trevor Zoo | NY Map It | NY | |
| Trout Unlimited | VA Map It | VA | |
| Trout Unlimited (Oak Brook Chapter) | IL Map It | IL | |
| Trout Unlimited Virginia | VA Map It | VA | |
| Tucson Audubon Society | AZ Map It | AZ | |
| Tuolumne River Preservation Trust | CA Map It | CA | |
| Turner Endangered Species Fund | MT Map It | MT | |
| Turtle Island Restoration Network | CA Map It | CA | |
| Union of Concerned Scientists | DC Map It | DC | |
| Unitarian Universalist Ministry for Earth | OR Map It | OR | |
| Unitarian Universalists for the Ethical Treatment of Animals | VT Map It | VT | |
| United Church of Christ EcoAction | TX Map It | TX | |
| United Plant Savers | VA Map It | VA | |
| Upper Missouri Breaks Audubon Society | MT Map It | MT | |
| US PIRG | DC Map It | DC | |
| Vermont Audubon Society | VT Map It | VT | |
| Vernal Pool Association | MA Map It | MA | |
| Vet Voice Foundation | OR Map It | OR | |
| Virginia Forest Watch | VA Map It | VA | |
| Virginia Herpetological Society | VA Map It | VA | |
| Virginia Society of Ornithology | VA Map It | VA | |
| VOICE for Animals | ME Map It | ME | |
| Voices of Wildlife in NH | NH Map It | NH | |
| Walker Lake Working Group | NV Map It | NV | |
| Organization | Address | State / Province |
