Menard County, Illinois

Menard County, Illinois
Menard County Courthouse, Petersburg, Illinois
Location within the U.S. state of Illinois
Coordinates: 40°02′N 89°48′W / 40.03°N 89.8°W / 40.03; -89.8
Country United States
State Illinois
Founded1839
Named afterPierre Menard
SeatPetersburg
Largest cityPetersburg
Area
 • Total
315 sq mi (820 km2)
 • Land314 sq mi (810 km2)
 • Water1.0 sq mi (2.6 km2)  0.3%
Population
 (2020)
 • Total
12,297
 • Estimate 
(2024)
11,963
 • Density39.2/sq mi (15.1/km2)
Time zoneUTC−6 (Central)
 • Summer (DST)UTC−5 (CDT)
Congressional district15th
Websitewww.menardcountyil.com

Menard County is a county in the U.S. state of Illinois. According to the 2020 United States census, it had a population of 12,297. Its county seat is Petersburg. Menard County is part of the Springfield, Illinois metropolitan area.