Cass 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 13,695 people, with a population density of about 36.42 persons per square mile.
The county spans a total land area of 376.00 square miles (974.00 square kilometers). The administrative center and county seat is Virginia, which often serves as a hub for local governance and services. The largest city within the county by population is Beardstown.
Geographically, Cass County experiences varied elevations, with its highest point at Ashland 633 ft and its lowest point at Beardstown 445 ft. The region operates in the UTC-6.