Columbia Flag

Columbia

County:
Monroe County
County Seat:
No
Area (mi²):
10.55
State:
Illinois

Columbia is a city located in Monroe County, Illinois. Columbia has a 2026 population of 10,919. Columbia is currently declining at a rate of -0.67% annually and its population has decreased by -1.04% since the most recent census, which recorded a population of 11,034 in 2020.

10.9K
Total Population
1,035
Density (mi²)
-74 -0.67%
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)