William Guy Hardwick (May 30, 1910 – January 15, 1993) was an American politician and lawyer who served as the 18th lieutenant governor of Alabama from 1955 to 1959 as a member of the Democratic Party.
Hardwick subsequently graduated from the University of Alabama, where he also obtained a law degree in 1933.
Hardwick was re-elected to the Alabama House of Representatives in 1942, though he resigned to enter the United States Air Force that same year, enlisting as a second lieutenant.
Hardwick served as a member of the Alabama Senate in 1946, representing the counties of Henry and Houston.
Hardwick married Dorothy Creel in Dothan, Alabama, on September 18, 1936.