| Competition: | STC Cup Korea National League |
| Season: | 2006 |
| Winners: | Goyang Kookmin Bank (3rd title) |
| Best Player: | Choi Jung-min |
| League Topscorer: | Kim Young-hoo (19 goals) |
| Matches: | 112 |
| Total Goals: | 310 |
| Biggest Home Win: | Kookmin 7 - 0 Gangneung (3 June 2006) |
| Biggest Away Win: | KHNP 1 - 5 Korail (3 October 2006) |
| Highest Scoring: | Hummel 3 - 6 HMD (12 September 2006) |
| Longest Wins: | 5 matches Goyang Kookmin Bank |
| Longest Unbeaten: | 10 matches Goyang Kookmin Bank |
| Longest Winless: | 10 matches Icheon Hummel Korea Seosan Citizen |
| Longest Losses: | 6 matches Gangneung City |
| Prevseason: | 2005 |
| Nextseason: | 2007 |
The 2006 Korea National League was the fourth season of the Korea National League. It was divided into two stages, and the winners of each stage qualified for the championship playoff.
----Goyang Kookmin Bank won 2–0 on aggregate.
| Award | Winner | Club | |
|---|---|---|---|
| Most Valuable Player |  Choi Jung-min | Goyang Kookmin Bank | |
| Top goalscorer | Kim Young-hoo | Hyundai Mipo Dockyard | |
| Top assist provider | Lee Sung-kil | Gimpo Hallelujah | |
| Manager of the Year | Lee Woo-hyung | Goyang Kookmin Bank | |
| Fair Play Award | Hyundai Mipo Dockyard | ||
| Position | Winner | Club |
|---|---|---|
| Goalkeeper | Kim Tae-young | Goyang Kookmin Bank |
| Defenders | Ha Yong-woo | Daejeon KHNP |
| Lee Chang-keun | Icheon Hummel Korea | |
| Yoon Keun-ho | Seosan Citizen | |
| Yoo Jin-oh | Gangneung City | |
| Midfielders | Kim Ki-beom | Busan Transportation Corporation |
| Choi Myung-sung | Changwon City | |
| Oh Jung-seok | Suwon City | |
| Cho Sung-won | Incheon Korail | |
| Forwards | Kim Young-hoo | Hyundai Mipo Dockyard |
| Park Do-hyun | Gimpo Hallelujah |