| Birth Date: | 8 July 1982 |
| Birth Place: | Yeongam, South Korea |
| Sport: | Athletics |
| Event: | 50km Race Walk |
Park Chil-Sung (pronounced as /ko/; born 8 July 1982) is a South Korean race walker.
| Representing | ||||||
|---|---|---|---|---|---|---|
| 2003 | Universiade | Daegu, South Korea | 5th | 20 km | 1:24:45 | |
| 2004 | Athens, Greece | 41st | 20 km | 1:32:41 | ||
| 2005 | Universiade | Izmir, Turkey | 6th | 20 km | 1:27:24 | |
| 2007 | World Championships | Osaka, Japan | 15th | 20 km | 1:26:08 | |
| Universiade | Bangkok, Thailand | 2nd | 20 km | 1:24:42 | ||
| 2008 | Olympic Games | Beijing, China | 33rd | 20 km | 1:25:07 | |
| 2009 | Universiade | Belgrade, Serbia | 10th | 20 km | 1:24:16 | |
| World Championships | Berlin, Germany | 25th | 20 km | 1:24:01 | ||
| Asian Championships | Guangzhou, PR China | 3rd | 20 km | 1:24:51 | ||
| 2010 | Asian Games | Guangzhou, China | – | 20 km | DQ | |
| 2011 | World Championships | Daegu, South Korea | – | 20 km | DNF | |
| 6th | 50 km | 3:47:13 | ||||
| 2012 | Olympic Games | London, United Kingdom | – | 20 km | DNF | |
| 13th | 50 km | 3:45:55 (NR) | ||||
| 2014 | Asian Games | Incheon, South Korea | bgcolor=silver | 2nd | 50 km | 3:49:15 |
| 2015 | World Championships | Beijing, China | 23rd | 50 km | 3:56:42[1] | |
| 2016 | Olympic Games | Rio de Janeiro, Brazil | – | 50 km | DQ | |
| 2017 | World Championships | London, United Kingdom | 29th | 50 km | 3:59:46 | |
| 2018 | Asian Games | Jakarta, Indonesia | – | 50 km | DQ | |