Linquan County is a county-level division located in the northwestern part of Anhui Province, China. It serves as the westernmost county within Fuyang City and shares borders with Henan Province to its northwest, west, and southwest. The county covers an area of approximately 702 square miles (1,820 km2).
The region is characterized by the Quan River, a tributary of the Ying River that originates in Henan Province. The river flows through the county seat of Chengguan before moving along the northern border with Jieshou. According to the 2010 census, Linquan had a population of 1,543,218, making it the most populous rural county in China.