2003 All Thailand Golf Tour
The 2003 All Thailand Golf Tour is the fifth season of the All Thailand Golf Tour, the main professional golf tour in Thailand since it was established in 1999.
Tournament results
The table below shows the 2003 schedule.| Date | Tournament | Location | Prize money men | Men's winner |
| 13 Apr | Singha Pattaya Open | Burapha Golf Club | 1,000,000 |  Thaworn Wiratchant |
| 22 Jun | TPC Championships | The Vintage Club | 1,000,000 |  Jim Johnson |
| 26 Jul | Singha Classic | Springfield Royal Country Club | 1,000,000 | Boonchu Ruangkit |
| 30 Jul | Cotto Open | Burapha Golf Club | 1,000,000 |  Simon Yates |