Kim Hyun-sub (born 31 May 1985) is a male race walker from South Korea.
| Year | Competition | Venue | Position | Notes |
|---|---|---|---|---|
| Representing South Korea | ||||
| 2004 | World Junior Championships | Grosseto, Italy | 3rd | 10,000 m |
| World Race Walking Cup | Naumburg, Germany | 8th | 10 km | |
| 2005 | Universiade | Izmir, Turkey | 2nd | 20 km |
| Asian Championships | Incheon, South Korea | 2nd | 20 km[1] | |
| 2006 | Asian Games | Doha, Qatar | 2nd | 20 km |
| 2007 | World Championships | Osaka, Japan | 20th | 20 km |
| 2008 | Olympic Games | Beijing, PR China | 23rd | 20 km |
| World Race Walking Cup | Cheboksary, Russia | 20th | 20 km | |
| 2009 | East Asian Games | Hong Kong, PR China | 3rd | 20 km |
| World Championships | Berlin, Germany | 34th | 20 km | |
| World Championships | Daegu | 6th | 20 km | |