Knox County, Illinois

Knox County, Illinois
Location within the U.S. state of Illinois
Coordinates: 40°56′N 90°13′W / 40.93°N 90.21°W / 40.93; -90.21
Country United States
State Illinois
Founded1825
Named afterHenry Knox
SeatGalesburg
Largest cityGalesburg
Government
 • Board ChairmanJared Hawkinson
Area
 • Total
720 sq mi (1,900 km2)
 • Land716 sq mi (1,850 km2)
 • Water3.4 sq mi (8.8 km2)  0.5%
Population
 (2020)
 • Total
49,967
 • Estimate 
(2024)
48,716
 • Density69.8/sq mi (26.9/km2)
Time zoneUTC−6 (Central)
 • Summer (DST)UTC−5 (CDT)
Congressional district17th
Websiteknoxcountyil.gov

Knox County is a county in the U.S. state of Illinois. According to the 2020 census, it had a population of 49,967. Its county seat is Galesburg. Knox County comprises the Galesburg, IL Micropolitan Statistical Area.