- Tanzania, , Tanzania, (Administrative Boundary)1
- Tillamook Bay, Oregon, United States, (Hydrographic)1
- Tillamook, Oregon, United States, (Administrative Boundary)1
- Tuscany, Tuscany, Italy, (Administrative Boundary)1
- Türkiye, , Türkiye, (Administrative Boundary)1
- Uganda, , Uganda, (Administrative Boundary)1
- Umpqua National Forest, Oregon, United States, (Vegetation)1
- United States, , United States, (Administrative Boundary)1
- Valdez-Cordova, Alaska, United States, (Administrative Boundary)1
- Walla Walla River, Washington, United States, (Hydrographic)1
- Washington, United States1
- Washington, Washington, United States, (Administrative Boundary)1
- Weippe Prairie, Idaho, United States, (Hypsographic)1
- West Fork Smith River, Oregon, United States, (Hydrographic)1
- Westport, Town of Westport, Fairfield County, Connecticut, United States1
- Whidbey Island, Island County, Washington, United States1
- Yosemite National Park, California, United States, (Area)1