Eureka Flag

Eureka

County:
Woodford County
County Seat:
No
Area (mi²):
2.737
State:
Illinois

Eureka is a city located in Woodford County, Illinois. Eureka has a 2026 population of 5,189. Eureka is currently declining at a rate of -0.35% annually and its population has decreased by -0.54% since the most recent census, which recorded a population of 5,217 in 2020.

5.2K
Total Population
1,896
Density (mi²)
-18 -0.35%
Growth

Nearby Cities

Sources

  1. US Census State Population Estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  2. US Census County Population Estimates - Most recent county estimates from the Census Bureau's Population Estimates Program
  3. American Community Survey (2009 - 2013)
  4. Census QuickFacts
  5. Historical Populations of States and Counties (1790 - 1990)