Nhiek Tioulong (Khmer: ??? ?????; 23 August 1908 – 9 June 1996) was a Cambodian army officer and politician who served as Acting Prime Minister of Cambodia from 13 February 1962 to 6 August 1962.
He was a prominent politician during the tenure of Prince Norodom Sihanouk.
He also served as Minister for Foreign Affairs in the 1960s and repeatedly as governor of provinces in Cambodia.
Tioulong fathered seven daughters, one of whom was future lawmaker Tioulong Saumura, who would go on to marry prominent opposition leader Sam Rainsy.