| Billy Sweetzer | |
| Fullname: | William Sweetzer[1] |
| Birth Date: | 15 February 1958 |
| Birth Place: | Toronto, Ontario, Canada |
| Position: | Defender / Midfielder |
| Youthyears1: | 1973–1975 |
| Youthclubs1: | Oxford United |
| Youthyears2: | 1975–1977 |
| Youthclubs2: | Queens Park Rangers |
| Years1: | 1977–1980 |
| Clubs1: | Brentford |
| Caps1: | 0 |
| Goals1: | 0 |
| Years2: | 1980–1981 |
| Clubs2: | Bracknell Town |
| Years3: | 1981 |
| Clubs3: | Tampa Bay Rowdies |
| Caps3: | 5 |
| Goals3: | 0 |
| Totalcaps: | 5 |
| Totalgoals: | 0 |
William Sweetzer (born 15 February 1958) is a Canadian former professional soccer player. He began his career in England as a youth player with both Oxford United and Queens Park Rangers, before he became a professional with Brentford – although he never made a league appearance.[2] He later played non-league football with Bracknell Town, before playing in the NASL for the Tampa Bay Rowdies in 1981. His brothers Gordon and Jimmy also played professional soccer.