Tiantongyuannan Subdistrict (Chinese: 天通苑南街道; pinyin: Tiāntōngyuànnán Jiēdào) is a subdistrict on the southern side of Changping District, Beijing, China.

It borders Tiantongyuanbei Subdistrict in the north and east, Laiguangying Township and Aoyuncun Subdistrict in the south, Dongsheng and Dongxiaokou Towns in the west.

[1] The subdistrict was created in 2012.

It took its name from Tiantongyuan, the community that it makes up the southern part of.

[2] As of 2021, Tiantongyuannan Subdistrict was composed of 16 subdivisions, of which 15 were communities, and 1 was a village:[3]