Macoupin 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 49,019 people, with a population density of about 56.73 persons per square mile.
The county spans a total land area of 864.00 square miles (2,238.00 square kilometers). The administrative center and county seat is Carlinville, which often serves as a hub for local governance and services. The largest city within the county by population is Carlinville.
Geographically, Macoupin County experiences varied elevations, with its highest point at Modesto 685 ft and its lowest point at Palmyra 0 ft. The region operates in the UTC-6.