Montgomery County, Illinois

Not to be confused with Montgomery, Illinois.

Montgomery County
County
Montgomery County Courthouse, Hillsboro
Montgomery County Courthouse, Hillsboro
Map of Illinois highlighting Montgomery County
Location within the U.S. state of Illinois
Map of the United States highlighting Illinois
Illinois's location within the U.S.
Coordinates: 39°14′N 89°29′W / 39.23°N 89.48°W / 39.23; -89.48
Country United States
State Illinois
Founded1821
Named forRichard Montgomery
SeatHillsboro
Largest cityLitchfield
Area
 • Total
710 sq mi (1,800 km2)
 • Land704 sq mi (1,820 km2)
 • Water6.0 sq mi (16 km2)  0.8%
Population
 (2020)
 • Total
28,288
 • Density40/sq mi (15/km2)
Time zoneUTC−6 (Central)
 • Summer (DST)UTC−5 (CDT)
Congressional district15th
Websitewww.montgomeryco.com

Montgomery County is a county located in the U.S. state of Illinois. According to the 2020 census, it had a population of 28,288.[1] Its county seat is Hillsboro.[2][3]

  1. ^ "Montgomery County, Illinois". United States Census Bureau. Retrieved June 10, 2023.
  2. ^ "Hillsboro Illinois". City of Hillsboro. Retrieved February 15, 2012.
  3. ^ "Find a County". National Association of Counties. Retrieved June 7, 2011.