2015 K League Challenge
| Season | 2015 | 
|---|---|
| Champions | Sangju Sangmu  (2nd title)  | 
| Promoted | Sangju Sangmu  Suwon FC  | 
| Matches played | 220 | 
| Goals scored | 593 (2.7 per match) | 
| Best Player | Johnathan | 
| Top goalscorer | Johnathan  (26 goals)  | 
| Biggest home win | Gangwon 4–0 Bucheon  (4 April 2015) Seoul E 4-0 Chungju (16 May 2015) Sangju 4–0 Chungju (13 June 2015) Daegu 5–1 Sangju (23 September 2015)  | 
| Biggest away win | Goyang 0–5 Sangju  (13 May 2015)  | 
| Highest scoring | Gangwon 4–4 Seoul E  (22 November 2015)  | 
| Highest attendance | 20,157  Daegu 2–1 Gangwon (29 March 2015)  | 
| Lowest attendance | 249  Goyang 1–0 Gangwon (10 June 2015)  | 
| Average attendance | 1,606 | 
← 2014  2016 →   | |
The 2015 K League Challenge was the third season of the K League 2, the second-highest division in the South Korean football league system. Champions and winners of promotion playoffs could be promoted to the K League Classic.