 | This article includes a list of general references, but it lacks sufficient corresponding inline citations. (April 2021) |
| Season | 2009 |
|---|---|
| Champions | Police United |
| Promoted | Police United Royal Thai Army Sisaket |
| Relegated | Surat Thani Thai Airways-Ban Bueng Nakhon Sawan |
| Top goalscorer |  Wutthipong Kerdkul(Rattana Bundit) (27) |
| Biggest home win | Police United 16-1 Nakhon Sawan |
| Biggest away win | Nakhon Sawan 0-8 Royal Thai Air Force |
| Highest scoring | Police United 16-1 Nakhon Sawan |
← 2008 2010 → | |
The 2009 Thai League Division 1 has 16 teams.