| Thai FA Cup | |
| Year: | 2013 |
| Country: | Thailand |
| Dates: | 13 March 2013 – 10 November 2013 |
| Num Teams: | 86 |
| Champions: | Buriram United |
| Count: | 3 |
| Runner-Up: | Bangkok Glass |
| Matches: | 85 |
| Goals: | 253 |
| Top Goal Scorer: | Kirati Keawsombat 5 goals |
| Prevseason: | 2012 |
| Nextseason: | 2014 |
The Thai FA Cup 2013 (th|มูลนิธิไทยคม เอฟเอคัพ) is the 20th season of Thailand knockout football competition. The tournament is organized by the Football Association of Thailand.
The cup winner is guaranteed a place in the 2014 AFC Champions League Play-off.
| Round | Date | Matches | width=100 | Clubs ! | New entries this round |
|---|---|---|---|---|---|
| Qualifying first round | 13 March 2013 | 10 | 20 → 10 | 20 (Regional League Division 2 and Other CUP) | |
| Qualifying Second Round | 3 April 2013 | 20 | 30 + 10 → 20 | 30 (Regional League Division 2 and Other CUP) | |
| First round | 10 April 2013 | 10 | 20 → 10 | ||
| Second Round | 24 April 2013 | 14 | 10 + 18 → 14 | ||
| Third Round | 26 June 2013 | 16 | 14 + 18 → 16 | 18 2013 Thai Premier League | |
| Fourth Round | 10 July 2013 | 8 | 16 → 8 | ||
| Quarterfinals | 28 August 2013 | 4 | 8 → 4 | ||
| Semifinals | 25 September 2013 | 2 | 4 → 2 | ||
| Final | 10 November 2013 | 1 | 2 → 1 | ||
| Total | 86 clubs | ||||
|colspan="3" style="background-color:#99CCCC"|3 April 2013|-|-|-|-|-|-|-|-|-|-|-|-|}
1 Samut Sakhon Boorana won because Phayao withdrew
2 Lampang won because Pluak Daeng withdrew
|colspan="3" style="background-color:#99CCCC"|10 April 2013|-|-|-|-|-|-|-|-|-|}
1 Nara United won because Samut Sakorn Boorana refused to travel to the deep south and therefore forfeited the tie
2 Phattalung won because Mukdahan withdrew
1 Bangkok won because Sisaket was suspended
2 Match was abandoned at 45' (1–0) due to floodlight failure; completed on June 27
See main article: 2013 Thai FA Cup Final.