Zhashui County (simplified Chinese: 柞水县; traditional Chinese: 柞水縣; pinyin: Zhàshuǐ Xiàn) is a county in the south-central part of Shaanxi province, China.

It is under the administration of the prefecture-level city of Shangluo, and has an area of 2,322 km2 (897 sq mi) and a population of 160,000 as of 2004.

[1] As of 2020, Zhashui County has 1 Subdistricts and 8 Towns and 1 Townships under its administration.

[2] Zhashui is served by the Xi'an–Ankang Railway.