List of prime ministers of Thailand

Top left: Phraya Manopakorn Nitithada was the first prime minister of Thailand.
Top right: Plaek Phibunsongkhram was the longest-serving prime minister.
Bottom left: Yingluck Shinawatra was the first female prime minister of Thailand.
Bottom right: Paetongtarn Shinawatra is the second female, the youngest (at the age of 37) and the incumbent prime minister.

The prime minister of Thailand (Thai: นายกรัฐมนตรี; RTGS: Nayok Ratthamontri; IPA: [naː.jók rát.tʰà.mon.triː], literally 'chief minister of state') is the head of government of Thailand. The prime minister is also the chairman of the cabinet of Thailand and represents the government at home and the country abroad.

The post of prime minister had existed in some forms throughout the history of Thailand, the most known form was the Samuhanayok post. This position emerged during the Ayutthaya Kingdom as part of the centralization of government.

The modern post of prime minister has existed since the Siamese revolution of 1932 and Siam's first constitution. Throughout the post's existence, it has mostly been occupied by military leaders from the Royal Thai Army, three holding the rank of field marshal and seven the rank of general.

The current prime minister is Paetongtarn Shinawatra, leader of the Pheu Thai Party, who assumed the office on 16 August 2024. A member of the Shinawatra political family, she is the youngest person and the second woman to hold the office.

Note: The list includes leaders of military juntas and acting prime ministers. However, they are not counted in the official list as provided by the Royal Thai Government.