Hejing County is a county-level division located in the central-southern region of the Tian Shan mountains in Xinjiang, China. It is situated in the northwestern part of the Bayingolin Mongol Autonomous Prefecture and serves as its northernmost county-level division.
The county is positioned approximately 190 km (120 mi) south of Ürümqi City and 80 km (50 mi) north of Korla City. It shares borders with 15 different cities and counties, a geographic characteristic that makes it the most bordered county in the world.