Perry County is a county located in the U.S. state of Illinois. As of the most recent data available, the county has a population of approximately 23,094 people, with a population density of about 52.37 persons per square mile.
The county spans a total land area of 441.00 square miles (1,142.00 square kilometers). The administrative center and county seat is Pinckneyville, which often serves as a hub for local governance and services. The largest city within the county by population is Du Quoin.
Geographically, Perry County experiences varied elevations, with its highest point at Tamaroa 505 ft and its lowest point at Pinckneyville 439 ft. The region operates in the UTC-6.