T
- Tarkington (1922–1923)
- Taunton (1901–1903)
- Taunton (1904–1905)
- Templar (1917–1924)
- Templeton-Dubrie (1910)
- Terraplane (1932–1939)
- Terwilliger (see Empire Steamer (1904))
- Texan (1920–1922)
- Thomas (1902–1919)
- Thomas-Detroit (1906–1908)
- Thompson (1901–1907)
- Thompson Electric (1901)
- Thomson (1900–1903)
- Thor (1907-1909)
- Thresher Electric (1900)
- Tiffany Electric (1913–1914)
- Tiger (1914–1915)
- Tincher (1903–1909)
- Tinkham (1898–1899)
- Toledo (1901–1903)
- Tonawanda (see Towanda Electric)
- Torbensen (1902–1906)
- Touraine (1912–1916)
- Tourist (1902–1910)
- Towanda Electric (1902–1904)
- Tractmobile (1900–1902)
- Trask-Detroit (1922–1923)
- Traveler (1907–1908)
- Traveler (1910–1911)
- Traveler (1913–1914)
- Traveler (1924–1925)
- Trebert (1907–1908)
- Tribune (1917)
- Tricolet (1904–1906)
- Trimoto (or Tri-Motor) (1900–1901)
- Trinity Steamer (see Keene Steamobile)
- Triumph (1907–1912)
- Trumbull (1914–1915)
- Tucker (1946–1949)
- Tulsa (1918–1922)
- Twin City (1914)
- Twombly (1910–1911)
- Twombly (1913–1915)
- Twyford (1899–1902, 1904–1907)
Read more about this topic: List Of Defunct Automobile Manufacturers Of The United States