J
- Jackson (1903–1923)
- Jacquet Flyer (1921)
- Jaeger (1932–1933)
- James (1909–1911)
- Janney (1906)
- Jarvis-Huntington (1912)
- Jaxon Steam (1903)
- Jeannin (1908)
- Jeffery (1902–1917)
- Jenkins (1907–1912)
- Jewell (1906–1907; Jewel 1908-1909)
- Jewett (1922–1927)
- Johnson (1905–1912)
- Jones (1914–1920)
- Jones-Corbin (1903–1907)
- Jonz (1909–1912)
- Jordan (1916–1931)
- JPL (1913)
- Julian (1918, 1925)
- Junior R (1924)
Read more about this topic: List Of Defunct Automobile Manufacturers Of The United States