Scott County, Illinois

Scott County, Illinois
Location within the U.S. state of Illinois
Coordinates: 39°39′N 90°29′W / 39.65°N 90.48°W / 39.65; -90.48
Country United States
State Illinois
Founded1839
Named afterScott County, Kentucky
SeatWinchester
Largest cityWinchester
Area
 • Total
253 sq mi (660 km2)
 • Land251 sq mi (650 km2)
 • Water1.9 sq mi (4.9 km2)  0.7%
Population
 (2020)
 • Total
4,949
 • Estimate 
(2024)
4,880
 • Density19.7/sq mi (7.61/km2)
Time zoneUTC−6 (Central)
 • Summer (DST)UTC−5 (CDT)
Congressional district15th
Websitescottcoil.gov

Scott County is a county located in the U.S. state of Illinois. According to the 2020 census, it had a population of 4,949, making it the fourth-least populous county in Illinois. Its county seat is Winchester.

Scott County is part of the Jacksonville, IL Micropolitan Statistical Area, which is also included in the Springfield-Jacksonville-Lincoln, IL Combined Statistical Area.