| Yoo Byung-ok | |
| Birth Date: | 2 March 1964 |
| Birth Place: | South Korea |
| Position: | Defender |
| Youthclubs1: | Hanyang University |
| Years1: | 1987–1991 |
| Caps1: | 101 |
| Goals1: | 0 |
| Years2: | 1992–1995 |
| Caps2: | 82 |
| Goals2: | 0 |
| Totalcaps: | 183 |
| Totalgoals: | 0 |
| Nationalyears1: | 1983 |
| Nationalteam1: | South Korea U-20 |
| Nationalcaps1: | 6 |
| Nationalgoals1: | 0 |
| Nationalyears2: | 1984–1986 |
| Nationalteam2: | South Korea |
| Nationalcaps2: | 28 |
| Nationalgoals2: | 0 |
| Hangul: | 유병옥 |
| Rr: | Yu Byeongok |
| Mr: | Yu Pyŏngok |
Yoo Byung-ok (born 2 March 1964) is a South Korean football defender who played for South Korea in the 1986 FIFA World Cup.[1] He also played for Hanyang University.