Chau Seng (Khmer: ចៅ សេង, 15 March 1929 – 1977) was a Cambodian left-wing politician.
Seng was a Khmer Krom. Born in commune of Tri Tôn, Châu Đốc Province, Cochinchina (in present-day An Giang Province, Vietnam). He was a cousin of Chau Sen Cocsal Chhum. Educated in France, in Paris, he became a communist. On his return to Cambodia, he had become Norodom Sihanouk's private secretary.[1] He joint the Sangkum on 13 April 1957 together with Hou Yuon and Hu Nim. In the same year, Chau Seng was elected a member of National Assembly. After that he was appointed under-secretary, and later secretary of state for education. In 1967, he was rector of the Buddhist University.[2] Seng made a national attempt at Cambodianization, however it was failed.[3]