Songxi County (simplified Chinese: 松溪县; traditional Chinese: 松溪縣; pinyin: Sōngxī Xiàn) is a county under the administration of the prefecture-level city of Nanping, in the northwest of Fujian province, People's Republic of China, bordering Zhejiang province to the east. Its county seat is located at Songyuan Subdistrict.

The area is served by Songxi railway station.