4th Tennessee Cavalry Regiment may refer to:
- 4th Cavalry Regiment (United States), a cavalry regiment in the United States Army, active from 1855 to the present
- 4th Tennessee Cavalry Regiment (Starnes'-McLemore's), a cavalry regiment in the Confederate States Army during the American Civil War, active from May 1862 to April 26, 1865
- 4th Tennessee Cavalry Regiment (Union), a cavalry regiment in the Union Army during the American Civil War, active from July 1862 to July 12, 1865.
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