Fuyun County, also known as Koktokay County, is a county located in the Altay Prefecture of the Xinjiang Uyghur Autonomous Region in China. It covers a total area of 32,237 square kilometers and has a population of approximately 80,000 residents.
The administrative seat of Fuyun County is situated in Ku Ertix Town. The region is home to the Koktokay National Geopark, which is located in Koktokay Town. Transportation to the area is served by Fuyun Keketuohai Airport, and the county uses the postal code 836100.