John Beardsley (1816-1906) was an American colonel who commanded the 9th New York Cavalry Regiment during the American Civil War and also commanded the Cavalry Brigade of the I Corps of the Army of Virginia before resigning after a series of controversies during his military career.
- Occupation
- military officer
- Citizenship
- United States
- Born
- October 12, 1816
- Died
- February 18, 1906
