Lee County, Illinois

Lee County
Lee County Courthouse
Location within the U.S. state of Illinois
Illinois's location within the U.S.
Coordinates: 41°45′N 89°18′W / 41.75°N 89.3°W / 41.75; -89.3
Country United States
State Illinois
FoundedFebruary 27, 1839
Named afterHenry Lee III
SeatDixon
Largest cityDixon
Area
  Total
729 sq mi (1,890 km2)
  Land725 sq mi (1,880 km2)
  Water4.1 sq mi (11 km2)  0.6%
Population
 (2020)
  Total
34,145
  Estimate 
(2023)
33,654
  Density47/sq mi (18/km2)
Time zoneUTC−6 (Central)
  Summer (DST)UTC−5 (CDT)
Congressional district16th
Websitewww.leecountyil.com

Lee County is a county located in the U.S. state of Illinois. According to the 2020 census, it has a population of 34,145. Its county seat is Dixon. The Dixon, IL Micropolitan Statistical Area includes all of Lee County.