Home History
| Thailand Division 2 | 2021/09/04 12:00 | Chiangmai FC v Rayong FC | L | 2-1 |
| Europe Friendlies | 2021/07/03 09:30 | Trat FC v Rayong FC | W | 0-1 |
| Thailand Premier League | 2021/03/28 11:00 | Rayong FC v Chonburi | D | 1-1 |
| Thailand Premier League | 2021/03/21 10:00 | Bangkok United v Rayong FC | L | 4-1 |
| Thailand Premier League | 2021/03/17 11:00 | Rayong FC v Police Tero FC | W | 6-1 |
| Thailand Premier League | 2021/03/13 12:00 | Sukhothai FC v Rayong FC | L | 5-1 |
| Thailand Premier League | 2021/03/09 12:00 | Rayong FC v Prachuap FC | L | 1-3 |
| Thailand Premier League | 2021/03/06 12:00 | Trat FC v Rayong FC | D | 0-0 |
Away History
| Thailand Division 2 | 2021/09/04 11:00 | Lampang FC v Muangkan Utd | D | 1-1 |
| Thailand Cup | 2021/04/03 11:00 | Chiangrai Utd v Muangkan Utd | L | 2-1 |
| Thailand Division 3 | 2021/03/21 08:30 | Muangkan Utd v Lamphun Warrior FC | W | 2-1 |
| Thailand Division 3 | 2021/03/14 11:00 | Lamphun Warrior FC v Muangkan Utd | L | 2-0 |
| Thailand Division 3 | 2021/03/07 09:00 | Muangkan Utd v Bangkok FC | W | 2-0 |
| Thailand Division 3 | 2021/02/28 09:00 | North Bangkok University v Muangkan Utd | D | 0-0 |
| Thailand Division 3 | 2021/02/21 09:00 | Krabi FC v Muangkan Utd | W | 0-1 |
| Thailand Division 3 | 2021/02/14 09:00 | Muangkan Utd v Raj Pracha | D | 1-1 |