Yeung Sum, SBS, JP (Chinese: ??; born 22 November 1947 in Guangzhou, Guangdong with family roots in Zengcheng, Guangdong) is a Hong Kong politician and academic.
He served several terms as a Legislative Councillor and was the second chairman of the Democratic Party (DP), a pro-democracy political party in Hong Kong.
He is a lecturer in at the University of Hong Kong.