DeKalb Flag

DeKalb

County:
DeKalb County
County Seat:
No
Area (mi²):
17.824
State:
Illinois

DeKalb is a city located in DeKalb County, Illinois. DeKalb has a 2026 population of 40,491. DeKalb is currently growing at a rate of 0.43% annually and its population has increased by 0.66% since the most recent census, which recorded a population of 40,224 in 2020.

40.5K
Total Population
2,272
Density (mi²)
174 0.43%
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)