Nanshi Subdistrict () is a subdistrict situated on the northwestern part of Heping District, Tianjin. it borders Gulou Subdistrict to its north, Guangfudao Subdistrict to its east, Quanyechang Subdistrict to its south, and Xingnan Subdistrict to its west. It had 33,874 inhabitants under its administration as of 2010.
The name Nanshi literally means "Southern City" or "Southern Market".
In 2021, Nanshi Subdistrict was composed of 9 communities. They are listed as follows: