Kingdom of Siam may refer to:
*
Sukhothai Kingdom (1238–1351)
*
Ayutthaya Kingdom (1351–1767)
*
Thonburi Kingdom
The Thonburi Kingdom ( th, ธนบุรี) was a major Siamese kingdom which existed in Southeast Asia from 1767 to 1782, centered around the city of Thonburi, in Siam or present-day Thailand. The kingdom was founded by Taksin the Great, ...
(1768–1782)
* Rattanakosin Kingdom (1782–1932)
* Thailand before 24 June 1939 and again from 8 September 1945 to 20 July 1949
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