Nantai Temple (simplified Chinese: 南台寺; traditional Chinese: 南臺寺; pinyin: Nántaí Sì) is a Buddhist temple located on Mount Heng, in Nanyue District of Hengyang, Hunan, China. It is considered the ancestral temple of Caodong school, Fayan school and Yunmen school, and has also been classified as a National Key Buddhist Temple in Han Chinese Area in 1983.