Niujie is a subdistrict in Xicheng District in southwest Beijing, China. The name "Niujie" can refer to the street Niujie or to the neighborhood Niujie. The subdistrict was previously in Xuanwu District before the district was merged into Xicheng District in 2010. As of 2020, its total population is 51,410.

Xicheng is a district of the city of Beijing. Its 32 square kilometers (12 sq mi) cover the western half of the old city, and has 1,106,214 inhabitants. Its postal code is 100032. Xicheng is subdivided into 15 subdistricts of the city proper of Beijing. The former Xuanwu District was merged into Xicheng in July 2010.