John Mansfield was an American lawyer and Republican politician. He was the 15th lieutenant governor of California. During the American Civil War, he was a Union Army officer serving in the 2nd Wisconsin Infantry Regiment in the famous Iron Brigade of the Army of the Potomac. He took command of the regiment during the first day of the Battle of Gettysburg and remained in command until the regiment was disbanded in the fall of 1864. After the war, he received an honorary brevet to brigadier general.
- Occupation
- politician, lawyer
- Position held
- Lieutenant Governor of California
- Citizenship
- United States
- Born
- August 1822
