| name | image | type | Context | date effective | Language | location | date signed | Country | continent | depositary |
|---|---|---|---|---|---|---|---|---|---|---|
| Agreement for the Control of Opium Smoking in the Far East | 22/04/1937 | Bangkok | 27/11/1931 | Thailand | Asia | |||||
| Bowring Treaty |  | Unspecified | Thai language | 18/04/1855 | Thailand | Asia | ||||
| Siamese–American Treaty of Amity and Commerce | Unspecified | 24/06/1837 | Thai language | 14/04/1836 | Thailand | Asia | ||||
| Anglo-Siamese Treaty of 1909 | Transfer of Kelantan, Tringganu, Kedah and Perlis to Great Britain. | 09/07/1909 | English language | 10/03/1909 | Thailand | Asia | ||||
| Australian–Thai Peace Treaty | Peace | 03/04/1946 | Thailand | Asia |