| Season | 2012 |
|---|---|
| Champions | Ratchaburi |
| Promoted | Ratchaburi Suphanburi Bangkok United |
| Relegated | Phattalung JW Rangsit Raj Pracha Chanthaburi |
| Top goalscorer |  Lee Tuck (23 goals) |
| Biggest home win | FC Phuket 8–1 Chanthaburi (24 June 2012) |
| Biggest away win | Chanthaburi 1–9 Ratchaburi (30 May 2012) |
| Highest scoring | Chanthaburi 1–9 Ratchaburi (30 May 2012) (10 goals) |
| Highest attendance | 8,814 Suphanburi vs Saraburi, 20 October 2012 |
| Lowest attendance | 100 Krabi vs Air Force United 12 August 2012 |
← 2011 2013 → | |
2012 Thai League Division 1 (known as Yamaha League 1 for sponsorship reasons) is the 15th season of the League since its establishment in 1997. It is the feeder league for the Thai Premier League. A total of 18 teams will compete in the league this season.