Cairo Flag

Cairo

County Seat:
Yes
Area (mi²):
6.987
State:
Illinois

Cairo is a city located in Alexander County, Illinois. Cairo has a 2026 population of 1,523. It is also the county seat of Alexander County. Cairo is currently declining at a rate of -2.75% annually and its population has decreased by -11.25% since the most recent census, which recorded a population of 1,716 in 2020.

1.5K
Total Population
218
Density (mi²)
-43 -2.75%
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)