Thomas Mann Randolph Jr. (October 1, 1768 – June 20, 1828) was a planter, soldier, and politician from Virginia. He served as a member of both houses of the Virginia General Assembly, a Representative in the U.S. Congress, and as the 21st Governor of Virginia, from 1819-1822.He married Martha Jefferson, the oldest daughter of Thomas Jefferson, third President of the United States. They had eleven children who survived childhood.