Korea National Championship 2008 was the cup competition of the second-tier N-League in South Korea in 2008. The 5th edition of Korea National Championship was held from July 9 to July 18 in Yanggu, Gangwon-do. 14 clubs from the N-League and amateurs Gumi Siltron and Icheon Hyundai Autonet participated for a total of 16 clubs.
Daejeon HNP FC won the competition by defeating Ansan Hallelujah on penalties in the final on 18 July 2008.