2013 Korea National League
The 2013 Korea National League season was the eleventh season of the Korea National League. The 2013 season operated with ten clubs because four clubs were dropped out from the league. Goyang KB Kookmin Bank FC had merged with Ansan H FC. Ansan H FC moved to Goyang and changed club name to Goyang Hi FC at a time. Ansan H FC, Suwon City FC and Chungju Hummel FC participated in the newly-formed 2013 K League Challenge. The postseason playoff consisted of four teams. The league began on 9 March 2013 and ended on 23 November 2013 with the final playoff game.
Team changes from last season
;Parted in K League Challenge newly formed.- Ansan H FC
- Chungju Hummel FC
- Suwon City FC
;Name changed
- Daejeon KHNP FC → Gyeongju KHNP FC
2013 season teams
- Busan Transportation Corporation FC
- Changwon City FC
- Cheonan City FC
- Gangneung City FC
- Gimhae City FC
- Gyeongju Korea Hydro & Nuclear Power FC
- Incheon Korail FC
- Mokpo City FC
- Ulsan Hyundai Mipo Dockyard Dolphin FC
- Yongin City FC
| Team | Location | Stadium | Stadium capacity |
| Busan Transportation Corporation | Busan | Busan Gudeok Stadium | |
| Changwon City | Changwon | Changwon Football Center | |
| Cheonan City | Cheonan | Cheonan Stadium | |
| Gangneung City | Gangneung | Gangneung Stadium | |
| Gimhae City | Gimhae | Gimhae Stadium | |
| Gyeongju Korea Hydro & Nuclear Power | Gyeongju | Gyeongju Civic Stadium | |
| Incheon Korail | Incheon | Incheon Munhak Stadium | |
| Mokpo City | Mokpo | Mokpo International Football Center | |
| Ulsan Hyundai Mipo Dockyard Dolphin | Ulsan | Ulsan Stadium | |
| Yongin City | Yongin | Yongin Football Center |