Menard 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 12,486 people, with a population density of about 39.76 persons per square mile.
The county spans a total land area of 314.00 square miles (813.00 square kilometers). The administrative center and county seat is Petersburg, which often serves as a hub for local governance and services. The largest city within the county by population is Petersburg.
Geographically, Menard County experiences varied elevations, with its highest point at Tallula 620 ft and its lowest point at Petersburg 0 ft. The region operates in the UTC-6.