| Willy Renz | |
| Fullname: | William K. Renz |
| Nationality: |  Germany |
| Birth Date: | 24 May 1913 |
| Birth Place: | Germany |
| Death Date: | May |
| Death Place: | Philadelphia |
| Years1: | ?-? |
| Clubs1: | Cake Bakers Sport Club |
| Nationalyears1: | ?-? |
| Nationalteam1: | United States |
| Nationalcaps1: | 3 |
| Manageryears1: | ?-? |
| Managerclubs1: | United States (Player-coach) |
William K. Renz (May 24, 1913 - May 1981) 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,[1] and was a playing-coach.[2] On club level he played for Cake Bakers Sport Club in the United States.