| Competition: | Hyundai Oilbank K League Classic |
| Season: | 2013 |
| Dates: | 2 March – 1 December 2013 |
| Winners: | Pohang Steelers (5th title) |
| Continentalcup1: | Champions League |
| Continentalcup1 Qualifiers: | Pohang Steelers Ulsan Hyundai Jeonbuk Hyundai Motors FC Seoul |
| Relegated: | Daejeon Citizen Daegu FC Gangwon FC |
| Best Player: | Kim Shin-wook |
| League Topscorer: | Dejan Damjanović Kim Shin-wook (19 goals each) |
| Matches: | 266 |
| Total Goals: | 676 |
| Biggest Home Win: | Gyeongnam 6–0 Daejeon (23 June 2013) |
| Biggest Away Win: | Gangwon 0–4 Jeju (10 August 2013) |
| Highest Scoring: | Suwon 5–4 Jeonbuk (26 June 2013) |
| Longest Wins: | 7 matches FC Seoul (7 July – 15 August 2013) |
| Longest Unbeaten: | 13 matches FC Seoul (7 July – 6 October 2013) |
| Longest Winless: | 19 matches Daejeon Citizen (7 April – 15 August 2013) |
| Longest Losses: | 8 matches Gangwon FC |
| Highest Attendance: | 43,681 Seoul 2–1 Suwon (3 August 2013) |
| Lowest Attendance: | 749 Seongnam 0–1 Jeonnam (1 September 2013) |
| Average Attendance: | 7,652 |
| Prevseason: | 2012 |
| Nextseason: | 2014 |
The 2013 K League Classic was the 31st season of the top division of South Korean professional football. The South Korean professional football league, K League, was split into two divisions since this year, and the top division was named the "K League Classic". Its fixtures were announced on 30 January,[1] and began on 2 March.
| Team | Outgoing | Manner | Date | Incoming | Date | Table | |
|---|---|---|---|---|---|---|---|
| Daegu FC |  Moacir Pereira | End of contract | 2 December 2012[2] |  Dang Seong-jeung | 2 December 2012 | Pre-season | |
| Daejeon Citizen | Yoo Sang-chul | End of contract | 2 December 2012 | Kim In-wan | 2 December 2012[3] | ||
| Seongnam Ilhwa Chunma | Shin Tae-yong | Resigned | 11 December 2012 | An Ik-soo | 13 December 2012 | ||
| Jeonbuk Hyundai Motors | Lee Heung-sil (caretaker) | Resigned | 11 December 2012 | Fabio Lefundes (caretaker) | 20 December 2012 | ||
| Suwon Samsung Bluewings | Yoon Sung-hyo | Resigned | 12 December 2012 | Seo Jung-won | 12 December 2012 | ||
| Busan IPark | An Ik-soo | Signed for Seongnam | 13 December 2012 | Yoon Sung-hyo | 17 December 2012 | ||
| Daegu FC | Dang Seong-jeung | Resigned | 23 April 2013 | Baek Jong-chul | 23 April 2013 | 14th | |
| Gyeongnam FC | Choi Jin-han | Resigned | 22 May 2013[4] | Song Kwang-hwan (caretaker) | 22 May 2013 | 11th | |
| Gyeongnam FC | Song Kwang-hwan (caretaker) | Resigned | 29 May 2013 |  Ilija Petković | 29 May 2013[5] | 11th | |
| Jeonbuk Hyundai Motors | Fabio Lefundes (caretaker) | End of contract | 28 June 2013 | Choi Kang-hee | 28 June 2013 | 7th | |
| Gangwon FC | Kim Hak-bum | Sacked | 10 August 2013 | Kim Yong-kab | 14 August 2013 | 13th |
Restricting the number of foreign players strictly to four per team, including a slot for a player from AFC countries. A team could use four foreign players on the field each game including a least one player from the AFC country.
-----Sangju Sangmu won 4–2 on aggregate and were promoted to the K League Classic, while Gangwon FC were relegated to the K League Challenge.
The 2013 K League Awards was held on 3 December 2013.
| Award | Winner | Club | |
|---|---|---|---|
| Most Valuable Player | Kim Shin-wook | Ulsan Hyundai | |
| Top goalscorer |  Dejan Damjanović | FC Seoul | |
| Top assist provider |  Mauricio Molina | FC Seoul | |
| Young Player of the Year | Ko Moo-yeol | Pohang Steelers | |
| FANtastic Player | Kim Shin-wook | Ulsan Hyundai | |
| Manager of the Year | Hwang Sun-hong | Pohang Steelers | |
| Special Award | Kwon Jung-hyuk | ||
| Best Referee | Yoo Seon-ho | — | |
| Best Assistant Referee | Son Jae-seon | — | |
| Fair Play Award | FC Seoul | ||
| Youth Team of the Year | Pohang Jecheol High School (Pohang Steelers) | ||
| Position | Winner | Club |
|---|---|---|
| Goalkeeper | Kim Seung-gyu | Ulsan Hyundai |
| Defenders | Adilson | FC Seoul |
| Kim Chi-gon | Ulsan Hyundai | |
| Kim Won-il | Pohang Steelers | |
| Lee Yong | Ulsan Hyundai | |
| Midfielders | Ko Moo-yeol | Pohang Steelers |
| Lee Myung-joo | Pohang Steelers | |
| Ha Dae-sung | FC Seoul | |
| Leonardo | Jeonbuk Hyundai Motors | |
| Forwards | Kim Shin-wook | Ulsan Hyundai |
| Dejan Damjanović | FC Seoul |
