Kingdom of Siam

Kingdom of Siam may refer to:

• Sukhothai Kingdom (1238–1351)
• Ayutthaya Kingdom (1351–1767)
• Thonburi Kingdom (1768–1782)
• Rattanakosin Kingdom (1782–1932)
• Thailand before 24 June 1939 and again from 8 September 1945 to 20 July 1949