Borommaracha or Borom Racha (, ; ; "Supreme King"), or the extended version Borommarachathirat or Borom Rachathirat (, ; ; "Supreme King of High kings"), was a Thai royal title, and may refer to:
Borommarachathirat I (died 1388), third king of Ayutthaya Kingdom Borommarachathirat II (died 1448), king of Ayutthaya Borommarachathirat III (died 1491), king of Ayutthaya from 1488 to 1491 Borommarachathirat IV (died 1533), short-reigning king of Ayutthaya from 1529 to 1533 Taksin (1734–1782), known in some documents as Borommarachathirat IV
See also Barom Reachea (disambiguation), Khmer equivalent title Param (disambiguation) Rajadhi Raja (disambiguation)