Nankou is a town in the northwestern corner of Changping District, Beijing, China. It lies at the foot of part of the Taihang Mountain Range, which bounds the town to its north and west.
The town borders Badaling and Jingzhuang Towns to the north, Chengnan Subdistrict and Shisanling Town to the east, Machikou and Liucun Towns to the south, and Ruiyunguan Township to the west. In 2020, Nankou had 82,146 people under its administration.