McLean County, Illinois

McLean County, Illinois
Location within the U.S. state of Illinois
Coordinates: 40°29′N 88°51′W / 40.49°N 88.85°W / 40.49; -88.85
Country United States
State Illinois
FoundedDecember 25, 1830
Named afterJohn McLean
SeatBloomington
Largest cityBloomington
Area
 • Total
1,186 sq mi (3,070 km2)
 • Land1,183 sq mi (3,060 km2)
 • Water2.9 sq mi (7.5 km2)  0.2%
Population
 (2020)
 • Total
170,954
 • Estimate 
(2024)
172,069
 • Density144.5/sq mi (55.80/km2)
Time zoneUTC−6 (Central)
 • Summer (DST)UTC−5 (CDT)
Congressional districts16th, 17th
Websitewww.mcleancountyil.gov

McLean County is a U.S. county in the east central region of Illinois, and is the largest county by land area in the state. According to the 2020 Census, it had a population of 170,954. Its county seat is Bloomington. McLean County is included in the Bloomington–Normal, IL Metropolitan Statistical Area.