Tongyu (Chinese: 通榆; pinyin: Tōngyú) is a county in the northwest of Jilin province, China, bordering Inner Mongolia to the south and west.

It is the southernmost county-level division of the prefecture-level city of Baicheng, and has a population of 350,000[when?]

residing in an area of 8,476 km2 (3,273 sq mi).

The town of Tongyu can be considered to include the areas of Kaitong and Yangjing described below.

This Jilin location article is a stub.