List of Thai flags
This is a list of flags used in Thailand.
National flag
| Flag | Date | Use | Description | Usage |
| 1917–present | Flag of Thailand | Five horizontal stripes of red, white, blue, white and red, the middle stripe twice as wide as the others. The flag were colors standardized in 2017. | National flag |
Royal flags
Royal standards
Personal royal flags
Royal Thai Government flags
Naval flags
| Flag | Date | Use | Description |
| 1917– | Naval Jack | A national flag with the emblem of Royal Thai Navy in the center: a chakra inserted with an anchor under the Thai royal crown. The design is identical to Thai naval unit colours. Note that all Thai Army, Navy and Air Force unit colours called "Thong Chai Chalermphol. | |
| 1917– | Naval Ensign | A red disc containing a white elephant in regalia centred on the national flag. |
Military flags
Police flag
Religious flags
Diplomatic flags
Provincial flags
Historical flags
Flags of Thailand
| Flag | Date | Use | Description |
| c. 1680–1782 | Ensign of Siam | A red plain rectangular flag. | |
| 1782–1817 | State ensign of Siam | Red flag with a white chakra. | |
| 1817–1843 | State ensign of Siam | Red flag with a white elephant inside the chakra. | |
| 1843–1916 | Flag of Siam | A white elephant facing to the hoist in the red flag. Called in Thai language "Thong Chang . | |
| 1916–1917 | State flag and ensign of Siam | Red flag with a white elephant in regalia. | |
| 1916–1917 | Former ensign of Siam | Five horizontal stripes flag like the "Trairanga but the middle stripe is red. | |
| 1917–present | Last flag of Siam and current flag of Thailand | Five horizontal stripes of red, white, blue, white and red, the middle stripe twice as wide as the others. |