| Competition: | Sonata K League |
| Season: | 2010 |
| Winners: | FC Seoul (4th title) |
| Continentalcup1: | Champions League |
| Continentalcup1 Qualifiers: | FC Seoul Jeju United Suwon Samsung Bluewings Jeonbuk Hyundai Motors |
| Best Player: | Kim Eun-jung |
| League Topscorer: | Yoo Byung-soo (22 goals) |
| Matches: | 210 |
| Total Goals: | 604 |
| Biggest Home Win: | Seongnam 6–0 Incheon (14 March 2010) |
| Biggest Away Win: | Suwon 1–5 Jeonbuk (7 November 2010) |
| Highest Scoring: | Busan 5–3 Jeonnam (29 August 2010) |
| Longest Wins: | 6 matches Jeju United |
| Longest Unbeaten: | 10 matches FC Seoul |
| Longest Losses: | 6 matches Suwon Samsung Bluewings |
| Highest Attendance: | 60,747 Seoul 4–0 Seongnam (5 May 2010) |
| Lowest Attendance: | 1,019 Gwangju 0–1 Jeonnam (3 November 2010) |
| Average Attendance: | 10,941 |
| Prevseason: | 2009 |
| Nextseason: | 2011 |
The 2010 K League, officially known as Sonata K-League 2010, was the 28th season of the K League. It was sponsored by Hyundai Motor Company, and was held from 27 February to 5 December 2010.
The K League match-fixing scandal, the biggest incident in history of South Korean football, occurred in this season, and was revealed in 2011. 15 matches were fixed by 47 players, and they were banned for life from working in football.
| Team | Outgoing | Manner | Date | Incoming | Date | Table | |
|---|---|---|---|---|---|---|---|
| FC Seoul |  Şenol Güneş | End of contract | 25 November 2009[1] | Nelo Vingada | 14 December 2009[2] | Pre-season | |
| Daegu FC |  Byun Byung-joo | Resigned | 8 December 2009[3] | Lee Young-jin | 22 December 2009[4] | ||
| Pohang Steelers |  Sérgio Farias | Signed for Al-Ahli | 27 December 2009[5] | Waldemar Lemos | 3 January 2010[6] | ||
| Pohang Steelers | Waldemar Lemos | Sacked | 10 May 2010[7] | Park Chang-hyun | 10 May 2010[8] | 12th | |
| Suwon Samsung Bluewings | Cha Bum-kun | Resigned | 6 June 2010[9] | Yoon Sung-hyo | 15 June 2010[10] | 15th | |
| Incheon United |  Ilija Petković | Resigned | 8 June 2010[11] | Kim Bong-gil | 24 June 2010 | 6th | |
| Gyeongnam FC | Cho Kwang-rae | Signed for South Korea | 28 July 2010[12] | Kim Gwi-hwa | 28 July 2010[13] | 5th | |
| Incheon United | Kim Bong-gil | Caretaker | 22 August 2010 | Huh Jung-moo | 22 August 2010[14] | 9th | |
| Gwangju Sangmu | Lee Kang-jo | Resigned | 31 October 2010 | Lee Soo-chul | 31 October 2010 | 15th |
See main article: 2010 K League Championship.
The K League Players' Player of the Year was published by Korean edition of FourFourTwo in summer, and was not an official award of the K League, but 148 players participated in the selection process.[15]
| Award | Winner | Club | |
|---|---|---|---|
| Most Valuable Player | Kim Eun-jung | Jeju United | |
| Top goalscorer | Yoo Byung-soo | Incheon United | |
| Top assist provider | Koo Ja-cheol | Jeju United | |
| Rookie of the Year | Yoon Bit-garam | Gyeongnam FC | |
| FANtastic Player | Koo Ja-cheol | Jeju United | |
| Manager of the Year | Park Kyung-hoon | Jeju United | |
| Special Award | Kim Yong-dae | FC Seoul | |
| Kim Byung-ji | Gyeongnam FC | ||
| Back Min-chul | Daegu FC | ||
| Yoo Byung-seop | — | ||
| Ahn Sang-gi | — | ||
| Best Referee | Choi Myung-yong | — | |
| Best Assistant Referee | Jung Hae-sang | — | |
| Team of the Year | FC Seoul | ||
| Fair Play Award | Gangwon FC | ||
| Youth Team of the Year | Maetan High School (Suwon Samsung Bluewings) | ||
| Players' Player of the Year |  Dejan Damjanović | FC Seoul | |
| Team | Stadium | Matches | Highest | Lowest | Average | |
|---|---|---|---|---|---|---|
| Busan IPark | 14 | 4,393 | ||||
| Jeonnam Dragons | 14 | 12,004 | ||||
| Daegu FC | Daegu Stadium Daegu Civil Stadium | 14 | 4,946 | |||
| Daejeon Citizen | 14 | 8,577 | ||||
| FC Seoul | 14 | 30,849 | ||||
| Gangwon FC | Gangneung Stadium Chuncheon Stadium | 14 | 9,537 | |||
| Gwangju Sangmu | 14 | 3,782 | ||||
| Gyeongnam FC | 14 | 12,501 | ||||
| Incheon United | 14 | 8,571 | ||||
| Jeju United | 14 | 5,404 | ||||
| Jeonbuk Hyundai Motors | 14 | 14,300 | ||||
| Pohang Steelers | 14 | 11,174 | ||||
| Seongnam Ilhwa Chunma | 14 | 4,129 | ||||
| Suwon Samsung Bluewings | 14 | 26,163 | ||||
| Ulsan Hyundai | 14 | 7,786 | ||||
| Total | 210 | 10,941 | ||||
