Anton Medan, birth name Tan Hok Liang (10 October 1957 – 15 March 2021), born in Tebing Tinggi, was an Indonesian robber and gambling tycoon who converted to Islam and became a preacher in 1992. He later established a mosque, Masjid Jami' Tan Hok Liang, in , Cibinong, Bogor. Prior to his conversion to Islam, he grew up amid the dark politics of Indonesia. It was during Suharto's New Order rule when gangsters were used in politics, business and government agencies.