Bureau 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 35,503 people, with a population density of about 40.86 persons per square mile.
The county spans a total land area of 869.00 square miles (2,251.00 square kilometers). The administrative center and county seat is Princeton, which often serves as a hub for local governance and services. The largest city within the county by population is Princeton.
Geographically, Bureau County experiences varied elevations, with its highest point at Ohio 900 ft and its lowest point at Spring Valley 0 ft. The region operates in the UTC-6.