Dr. Ko Chung Sen (Chinese: 許崇信; Pe̍h-ōe-jī: Khó͘ Chông-sìn; born 1968) is a Malaysian surgeon and politician of Chinese descent. He was the Perak State Legislative Assemblyman for Kepayang from 2018 to 2022. He is a member of the Democratic Action Party (DAP), a component in the Pakatan Harapan (PH) coalition. A surgeon by profession, he received BAO cum laude from Trinity College in Dublin. He became a fellow of the Royal College of Surgeons in Ireland in 1999.