| Birth Date: | 11 January 1985 |
| Birth Place: | China |
| Height: | 172 cm |
| Weight: | 59 kg |
| Sport: | Table tennis |
| Club: | Korean Air |
| Show-Medals: | yes |
Seok Ha-jung (also Seok Ha-jeong 석 하정, born January 11, 1985, as Shi Lei) is a Chinese-born South Korean table tennis player. She won four bronze medals at major international competitions: two at the 2009 East Asian Games and one each at the 2010 Asian Games and 2012 World Championships. Her team placed fourth at the 2012 Summer Olympics. Her world ranking varied from 12 to 65 between 2008 and 2014, peaking in early 2011.