Eureka, Illinois

Eureka
Location of Eureka in Woodford County, Illinois.
Location of Illinois in the United States
Coordinates: 40°42′56″N 89°16′31″W / 40.71556°N 89.27528°W / 40.71556; -89.27528
CountryUnited States
StateIllinois
CountyWoodford
Government
  MayorEric Lind
Area
  Total
2.73 sq mi (7.08 km2)
  Land2.68 sq mi (6.95 km2)
  Water0.05 sq mi (0.12 km2)
Elevation
768 ft (234 m)
Population
 (2020)
  Total
5,227
  Density1,947.47/sq mi (751.86/km2)
Time zoneUTC-6 (CST)
  Summer (DST)UTC-5 (CDT)
ZIP Code(s)
61530
Area code309
FIPS code17-24543
GNIS ID2394706
Websitewww.eurekaillinois.net

Eureka is a city and the county seat of Woodford County, Illinois, United States. The population was 5,295 at the 2010 census. Eureka is part of the Peoria metropolitan area.

Eureka is a small community centered on the intersection of what is now U.S. 24 and Illinois 117. It is also one of the towns along the Ronald Reagan Trail, a series of roads that connect towns in central Illinois that were of importance to Reagan's early life. President Reagan attended and graduated from Eureka College.