| Nom du Parc | Etat/Ville | Type du Parc |
| Tallgrass Prairie National Preserve | Kansas (Strong City) | National Preserve |
| Thaddeus Kosciuszko National Memorial | Pennsylvanie (Philadelphia) | National Memorial |
| The Old Stone House | Columbia (district) (Washington) | |
| Theodore Roosevelt Birthplace National Historic Site | New York (New York) | National Historic Site |
| Theodore Roosevelt Inaugural National Historic Site | New York (Buffalo) | National Historic Site |
| Theodore Roosevelt Island | Columbia (district) (Washington) | |
| Theodore Roosevelt National Park | Dakota du Nord (Medora, 15 miles au sud de Watford City) | National Park |
| Thomas Jefferson Memorial | Columbia (district) (Washington) | Memorial |
| Thomas Stone National Historic Site | Maryland (Port Tobacco) | National Historic Site |
| Timpanogos Cave National Monument | Utah (American Fork) | National Monument |
| Timucuan Ecological & Historic Preserve | Floride (Jacksonville) | Ecological & Historic Preserve |
| Tonto National Monument | Arizona (Globe) | National Monument |
| Touro Synagogue National Historic Site | Rhode Island (Newport) | National Historic Site |
| Trail Of Tears National Historic Trail | Oklahoma (De l'Alabama au Tennessee) | National Historic Trail |
| Tumacácori National Historical Park | Arizona (Tumacácori) | National Historical Park |
| Tupelo National Battlefield | Mississippi (Tupelo) | National Battlefield |
| Tuskegee Airmen National Historic Site | Alabama (Tuskegee) | National Historic Site |
| Tuskegee Institute National Historic Site | Alabama (Tuskegee Institute) | National Historic Site |
| Tuzigoot National Monument | Arizona (Camp Verde) | National Monument |
