William K. Renz (May 24, 1913 – May 1981)[1] was an American male handball player.

He was a member of the United States men's national handball team.

He was part of the team at the 1936 Summer Olympics, playing 3 matches,[2] and was a playing-coach.

[3] On club level he played for Cake Bakers Sport Club in Philadelphia, Pennsylvania.

This biographical article related to American handball is a stub.