Rungroj Thainiyom (Thai: รุ่งโรจน์ ไทยนิยม, RTGS: Rungrot Thainiyom, born 16 December 1986) is a para table tennis player from Thailand. He has won a gold medal at the 2012 Summer Paralympics and a bronze medal at the 2016 Summer Paralympics. He was the first Thai to win a Paralympic gold medal in table tennis. He has muscular dystrophy.