Macoupin County, Illinois

Macoupin County
Macoupin County Courthouse in Carlinville
Location within the U.S. state of Illinois
Illinois's location within the U.S.
Coordinates: 39°16′N 89°55′W / 39.26°N 89.92°W / 39.26; -89.92
Country United States
State Illinois
Founded1829
Named afterMacoupin Creek
SeatCarlinville
Largest cityCarlinville
Area
  Total
868 sq mi (2,250 km2)
  Land863 sq mi (2,240 km2)
  Water4.7 sq mi (12 km2)  0.5%
Population
 (2020)
  Total
44,967
  Density52/sq mi (20/km2)
Time zoneUTC−6 (Central)
  Summer (DST)UTC−5 (CDT)
Congressional district13th
Websitewww.macoupincountyil.gov

Macoupin County is a county located in the U.S. state of Illinois. According to the 2020 census, it had a population of 44,967. The county seat is Carlinville.

The primary industry is agriculture, consisting of crops of corn (maize), soybeans, and some wheat.