Harold E. Sergent is an American former basketball player who starred at Morehead State University before embarking on a career with the Phillips 66ers of the Amateur Athletic Union.

A point guard from Kentucky, Sergent led Ashland High School to a state championship as a senior in 1960–61.

That season's state title run was later chronicled in a book entitled Teamwork: Ashland's 1961 Championship Basketball Season; it is considered one of the greatest high school teams in state history.

Sergent then enrolled at Morehead State to play for the Eagles for four years.

After college, Sergent played for the Phillips 66 Oilers (commonly known as the Phillips 66ers) in the Amateur Athletic Union, which at the time was the premier amateur basketball league in the United States.