| Ko Myeong-seok | |
| Birth Date: | 27 September 1995 |
| Birth Place: | Seoul, South Korea |
| Position: | Defender |
| Height: | 1.88 m |
| Currentclub: | Daegu FC |
| Years1: | 2017 |
| Clubs1: | Bucheon 1995 |
| Caps1: | 28 |
| Goals1: | 2 |
| Years2: | 2018 |
| Clubs2: | Daejeon Hana Citizen |
| Caps2: | 34 |
| Goals2: | 1 |
| Years3: | 2019–2024 |
| Clubs3: | Suwon Samsung Bluewings |
| Caps3: | 74 |
| Goals3: | 4 |
| Years4: | 2020–2021 |
| Clubs4: | → Gimcheon Sangmu (loan) |
| Caps4: | 17 |
| Goals4: | 0 |
| Years5: | 2024- |
| Clubs5: | Daegu FC |
| Caps5: | 0 |
| Goals5: | 0 |
| Nationalyears1: | 2014 |
| Nationalteam1: | South Korea U-20 |
| Nationalcaps1: | 0 |
| Nationalgoals1: | 0 |
| Nationalyears2: | 2017-2018 |
| Nationalteam2: | South Korea U-23 |
| Nationalcaps2: | 3 |
| Nationalgoals2: | 0 |
| Pcupdate: | 5 December 2021 |
| Ntupdate: | 11 December 2019 |
| Hangul: | 고명석 |
| Rr: | Go Myeongseok |
| Mr: | Ko Myŏngsŏk |
Ko Myeong-seok (; born 27 September 1995) is a South Korean professional footballer who plays as a defender for Suwon Samsung Bluewings.
For the 2018 season, Ko signed for South Korean second division side Daejeon Hana Citizen due to their head coach, South Korea international Ko Jong-soo.[1]
Before the 2019 season, he signed for Suwon Samsung Bluewings in the South Korean top flight.
Before the 2024 season, he signed for Daegu FC in the South Korean top flight.