| Season | 2018 |
|---|---|
| Dates | 2 March – 2 December 2018 |
| Champions | Jeonbuk Hyundai Motors (6th title) |
| Relegated | Jeonnam Dragons |
| Champions League | Jeonbuk Hyundai Motors Gyeongnam FC Ulsan Hyundai Daegu FC |
| Matches played | 228 |
| Goals scored | 620 (2.72 per match) |
| Best Player | Marcão |
| Top goalscorer | Marcão (26 goals) |
| Biggest home win | Gangwon 7–0 Incheon (19 August 2018) |
| Biggest away win | Gyeongnam 0–4 Jeonbuk (11 April 2018) Seoul 0–4 Jeonbuk (20 May 2018) |
| Highest scoring | Jeonnam 6–4 Suwon (19 August 2018) |
| Longest winning run | 9 matches Jeonbuk Hyundai Motors |
| Longest unbeaten run | 10 matches Jeonbuk Hyundai Motors |
| Longest winless run | 14 matches Incheon United |
| Longest losing run | 6 matches Daegu FC |
| Highest attendance | 30,122 Seoul 2–1 Suwon (5 May 2018) |
| Lowest attendance | 290 Sangju 0–1 Gangwon (24 November 2018) |
| Average attendance | 5,381 |
← 2017 2019 → | |
The 2018 K League 1 was the 36th season of the top division of professional football in South Korea since its establishment in 1983, and the sixth season of the K League 1, former K League Classic. The K League Classic was changed its name to "K League 1" in this season. As the 2018 FIFA World Cup start on 14 June, the last round before stoppage will be held on 19–20 May. The league will resume games on 7 July.