Tazewell 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 128,485 people, with a population density of about 197.97 persons per square mile.
The county spans a total land area of 649.00 square miles (1,681.00 square kilometers). The administrative center and county seat is Pekin, which often serves as a hub for local governance and services. The largest city within the county by population is Pekin.
Geographically, Tazewell County experiences varied elevations, with its highest point at Deer Creek 755 ft and its lowest point at East Peoria 450 ft. The region operates in the UTC-6.