| Hong Seong-yo | |
| Fullname: | Hong Seong-yo (홍성요) |
| Birth Date: | 26 May 1979 |
| Birth Place: | South Korea |
| Height: | 1.85 m |
| Position: | Defender |
| Years1: | 2002–2007 |
| Years2: | 2005–2006 |
| Years3: | 2008–2011 |
| Clubs1: | Chunnam Dragons |
| Clubs2: | → Gwangju Sangmu (army) |
| Clubs3: | Busan I'Park |
| Caps1: | 16 |
| Caps2: | 17 |
| Caps3: | 45 |
| Goals1: | 0 |
| Goals2: | 0 |
| Goals3: | 2 |
| Pcupdate: | 25 July 2011 |
Hong Seong-yo (; born May 26, 1979) is a South Korean football player. He played for Chunnam Dragons, Gwangju Sangmu and Busan I'Park formerly.