Tianzhu is a town in the southwestern corner of Shunyi District, Beijing, China. It borders several other towns and townships: Nanfaxin and Houshayu to the south, Renhe and Liqiao to the west, and Jinzhan and Sunhe to the north, with Konggang Subdistrict to the east. The town also surrounds Capital Airport Subdistrict on three sides.
According to the 2020 census, Tianzhu had a population of 32,979 residents. Its position adjacent to Beijing Capital International Airport and the surrounding subdistricts places it within the airport area of northeastern Beijing.