Yu Sung-yup (Korean: 유성엽, born 25 January 1960) is a South Korean politician who was the Member of the National Assembly for Jeongeup from 2008 (also for Gochang from 2016) to 2020. He was also the co-presidents of the Minsaeng Party, serving with Park Joo-hyun. He formerly served the mayor of Jeongeup from 2002 to 2006. As a former member of the Party for Democracy and Peace, he was the party's vice president from 2018 to 2019 and the parliamentary leader from May to August 2019.