| Jeong Seong-hoon 정성훈 鄭成勳 | |
| Number: | 16 |
| Position: | First baseman/Third baseman |
| Birth Date: | 27 June 1980 |
| Birth Place: | Gwangju |
| Bats: | Right |
| Throws: | Right |
| Debutleague: | KBO |
| Debutdate: | April 5 |
| Debutyear: | 1999 |
| Debutteam: | Haitai Tigers |
| Finaldate: | October 16 |
| Finalyear: | 2018 |
| Finalteam: | Kia Tigers |
| Statleague: | KBO |
| Stat1label: | Batting average |
| Stat1value: | .293 |
| Stat2label: | Home runs |
| Stat2value: | 174 |
| Stat3label: | RBI |
| Stat3value: | 997 |
| Stat4label: | Hits |
| Stat4value: | 2,159 |
| Teams: |
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Jeong Seong-hoon (born June 27, 1980) is South Korean former professional baseball player. He represented the South Korea national baseball team at the 2006 World Baseball Classic.
After nine seasons with the LG Twins, Jeong was released by the team at the end of the 2017 season. He played one more season, for his original franchise, the Kia Tigers, in 2018, before retiring.
His 2,159 career hits makes him one of only 11 players to amass more than 2,000 hits in their KBO League careers.