| Season | 2008 |
|---|---|
| Champions | Provincial Electricity Authority |
| Relegated | Bangkok Bank Customs Department Royal Thai Army |
| 2009 AFC Champions League | PEA |
| 2009 AFC Cup | Chonburi |
| Top goalscorer |  Anon Sangsanoi (BEC Tero Sasana) (20) |
| Biggest home win | Chula-Sinthana 5-0 Port Authority of Thailand |
| Biggest away win | Tobacco Monopoly 1-4 Krung Thai Bank Customs Department 1-4 Bangkok University Port Authority of Thailand 2-5 BEC Tero Sasana |
| Highest scoring | Chula-Sinthana 6-2 BEC Tero Sasana (8 goals) |
← 2007 2009 → | |
The 2008 Thai Premier League had 16 teams. It was the twelfth since its establishment. The first matches of the season were played on 18 February 2008, and the season ended on 11 October 2008. Three teams would be relegated to Thailand Division 1 League. The Champion in this season would qualify for the AFC Champions League 2009 qualification stage and the runner-up would be enter the AFC Cup 2009. The official name of the league at this time was Thailand Premier League.
Provincial Electricity Authority won their first championship after they changed their home stadium from Bangkok to Ayutthaya, where they have a bigger fan base. This season also saw the great successful team of Thai football league, Bangkok Bank relegated to Division 1 league after they were defeated by Chonburi in the final match of the season.
Defending champions Chonburi were pipped to the title after faltering against new Premier League side Samut Songkhram in the second to last game of the season. Samut finished in a creditable 7th place, one place above Chula United who also impressed in their first season back in the top flight.
Customs Department FC, the other newcomers along with, found life to difficult and dropped back into Division One at the first attempt.