| Birth Date: | 16 September 1974 |
| Hangul: | 지성환 |
| Rr: | Ji Seonghwan |
| Mr: | Chi Sŏnghwan |
Ji Seong-hwan (born September 16, 1974) is a field hockey player from South Korea, who was a member of the Men's National Team that won the silver medal at the 2000 Summer Olympics in Sydney. In the final the Asians were beaten by title holders the Netherlands after penalty strokes. He is nicknamed Long Leg, and also competed at the 2004 Summer Olympics in Athens.