Sanya Dharmasakti (Thai: สัญญา ธรรมศักดิ์, RTGS: Sanya Thammasak, pronounced [sǎn.jāː tʰām.mā.sàk]; 5 April 1907 – 6 January 2002) was a Thai jurist, university professor and politician. He served as the 12th Prime Minister of Thailand from 1973 to 1975.