| Billy Smyth | |
| Fullname: | William Thomas Smyth |
| Birth Date: | c. 1925 |
| Birth Place: | Belfast, Northern Ireland |
| Death Date: | 14 January |
| Death Place: | Belfast, Northern Ireland |
| Position: | Goalkeeper |
| Youthclubs1: | Balmoral United |
| Youthyears2: | 1943–1944 |
| Youthclubs2: | Distillery |
| Years1: | 1944–1955 |
| Clubs1: | Distillery |
| Years2: | 1955–1956 |
| Clubs2: | Ards |
| Nationalyears1: | 1948–1953 |
| Nationalteam1: | Northern Ireland |
| Nationalcaps1: | 4 |
| Nationalgoals1: | 0 |
William Thomas Smyth (c. 1925 – 14 January 2005) was a Northern Irish footballer who played as a goalkeeper.
Born in Belfast, Smyth played for Balmoral United, Distillery and Ards.[1] He also earned four caps for the Northern Ireland national team.[1]