Yu Sung-yup (Korean: ???, born 25 January 1960) is a South Korean politician who is a member of National Assembly at Jeongeup since 2008 (also at Gochang since 2016).
He formerly served the mayor of Jeongeup from 2002 to 2006.
As a former member of Party for Democracy and Peace, he was the party's Vice President from 2018 to 2019, and parliamentary leader from May to August 2019.