Carroll 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 16,674 people, with a population density of about 37.55 persons per square mile.
The county spans a total land area of 444.00 square miles (1,150.00 square kilometers). The administrative center and county seat is Mount Carroll, which often serves as a hub for local governance and services. The largest city within the county by population is Savanna.
Geographically, Carroll County experiences varied elevations, with its highest point at Shannon 925 ft and its lowest point at Thomson 600 ft. The region operates in the UTC-6.