Effingham Flag

Effingham

County Seat:
Yes
Area (mi²):
10.889
State:
Illinois

Effingham is a city located in Effingham County, Illinois. Effingham has a 2026 population of 12,434. It is also the county seat of Effingham County. Effingham is currently growing at a rate of 0.85% annually and its population has increased by 0.86% since the most recent census, which recorded a population of 12,328 in 2020.

12.4K
Total Population
1,142
Density (mi²)
105 0.85%
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)