Clinton A. Puckett was a United States Marine who served as the 6th Sergeant Major of the Marine Corps from February 1, 1973, until he retired from active duty on May 31, 1975. He served in World War II, the Korean War and the Vietnam War; receiving the Navy Cross for extraordinary heroism for actions in Korea. He was the last Sergeant Major of the Marine Corps to have served in World War II.

The sergeant major of the Marine Corps is a billet, as well as a unique enlisted grade of rank, and is designated a special paygrade above E-9. The position also has a unique non-commissioned grade of rank insignia, in the United States Marine Corps. The holder of this rank and position is the most senior enlisted marine in the Marine Corps, unless an enlisted marine is serving as the senior enlisted advisor to the chairman, which is the case as of November 3, 2023.