Assumption Flag

Assumption

County Seat:
No
Area (mi²):
0.99
State:
Illinois

Assumption is a city located in Christian County, Illinois. Assumption has a 2026 population of 1,123. Assumption is currently declining at a rate of -0.27% annually and its population has decreased by -2.77% since the most recent census, which recorded a population of 1,155 in 2020.

1.1K
Total Population
1,134
Density (mi²)
-3 -0.27%
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)