Shangnan County (simplified Chinese: 商南县; traditional Chinese: 商南縣; pinyin: Shāngnán Xiàn) is a county in the east of Shaanxi province, China, bordering the provinces of Henan to the east and Hubei to the south. It is the easternmost county-level division of the prefecture-level city of Shangluo, and has an area of 2,307 km² (891 sq mi) and a population of 230,000 as of 2004.

Shangnan County has 1 subdistrict and 8 towns.