Peoria 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 183,433 people, with a population density of about 295.86 persons per square mile.
The county spans a total land area of 620.00 square miles (1,606.00 square kilometers). The administrative center and county seat is Peoria, which often serves as a hub for local governance and services. The largest city within the county by population is Peoria.
Geographically, Peoria County experiences varied elevations, with its highest point at Peoria Heights 789 ft and its lowest point at Norwood 0 ft. The region operates in the UTC-6.