| Billy Sleeth | |
| Fullname: | William Charles Sleeth |
| Birth Date: | 23 October 1979 |
| Birth Place: | Spokane, Washington, United States |
| Position: | Defender |
| Youthyears1: | 1998–2001 |
| Youthclubs1: | Washington Huskies |
| Years1: | 1999 |
| Clubs1: | Spokane Shadow |
| Years2: | 2000–2001 |
| Clubs2: | Seattle Sounders Select |
| Years3: | 2002 |
| Clubs3: | Chicago Fire |
| Caps3: | 13 |
| Goals3: | 0 |
| Years4: | 2003 |
| Clubs4: | Colorado Rapids |
| Caps4: | 0 |
| Goals4: | 0 |
| Years5: | 2004–2005 |
| Clubs5: | Seattle Sounders |
| Caps5: | 35 |
| Goals5: | 0 |
William Charles Sleeth (born October 23, 1979) is a former American soccer player.