Montgomery 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 30,652 people, with a population density of about 43.54 persons per square mile.
The county spans a total land area of 704.00 square miles (1,823.00 square kilometers). The administrative center and county seat is Hillsboro, which often serves as a hub for local governance and services. The largest city within the county by population is Litchfield.
Geographically, Montgomery County experiences varied elevations, with its highest point at Nokomis 670 ft and its lowest point at Litchfield 0 ft. The region operates in the UTC-6.