| Honorific Prefix: | General |
| Sunthorn Kongsompong | |
| Honorific Suffix: | MPCh MWM ThChW |
| Native Name Lang: | th |
| Birth Date: | 1 August 1931 |
| Birth Place: | Bangkok, Krung Thep, Siam |
| Death Place: | Bangkok, Thailand |
| Children: | Apirat Kongsompong |
| Allegiance: |  Thailand |
| Office: | Prime Minister de facto of Thailand |
| Predecessor: | Chatichai Choonhavan |
| Successor: | Anand Panyarachun |
| Office2: | Chairman of the National Peacekeeping Council |
| Termstart: | 23 February 1991 |
| Termend: | 1 March 1991 |
| Termstart2: | 24 February 1991 |
| Termend2: | 7 April 1992 |
| Predecessor2: | Office established |
| Successor2: | Office abolished |
| Office3: | Supreme Commander of the Armed Forces |
| Termstart3: | 1 April 1990 |
| Termend3: | 30 September 1991 |
| Predecessor3: | Chavalit Yongchaiyudh |
| Successor3: | Suchinda Kraprayoon |
| Office4: | Commander-in-Chief of the Royal Thai Army |
| Termstart4: | 31 March 1990 |
| Termend4: | 7 April 1992 |
| Predecessor4: | Chavalit Yongchaiyudh |
| Successor4: | Isarapong Noonpakdee |
Sunthorn Kongsompong (Thai: สุนทร คงสมพงษ์,, in Thai pronounced as /sǔn.tʰɔːn kʰoŋ.sǒm.pʰoŋ/; 1 August 1931 – 2 August 1999) was the de facto head of government of Thailand from 1991 to 1992, after a military coup d'etat led by Sunthorn and General Suchinda Kraprayoon deposed the government of Prime Minister Chatichai Choonhavan on 23 February 1991. The generals accused Chatichai of corruption, and established the National Peacekeeping Council (NPKC) as an interim administration, with Sunthorn as chairman. Anand Panyarachun was appointed prime minister in March 1991, but the administration of the country was also executed by the NPKC.
Sunthorn left the political office following the May 1992 constitution promulgation, which prohibited members of the military from executing the premier's office.[1]
His son was Apirat Kongsompong, who from 2018 to 2020 was Commander in Chief of the Royal Thai Army.