Xinjiekou () is a subdistrict of Xicheng District (西åÂÂåº) of Beijing, China. As of 2020, the subdistrict has a total population of 84,866.
The subdistrict got its name from a section of road on the eastern portion of Xizhimennei Avenue, which used to be a river port but underwent land reclamation in 1438. The newly created land was settled, and recorded as Xinjiekou () in 1593.
By 2021, It is divided into the following village-level divisions: