Illinois City Flag

Illinois City

County Seat:
No
Area (mi²):
0.457
State:
Illinois

Illinois City is a CDP located in Rock Island County, Illinois. Illinois City has a 2025 population of 46. Illinois City is currently growing at a rate of 6.98% annually but its population has decreased by -20.69% since the most recent census, which recorded a population of 58 in 2020.

46
Total Population
101
Density (mi²)
3 6.98%
Growth

Illinois City Population

Illinois City Population

Data after 2023 is projected based on recent change

Demographics

The racial composition of Illinois City includes 100% White, and smaller percentages for and multiracial populations.

Population by Race

Race
Population
Percentage (of total)
White18100%

Illinois City Marital Status

OverallMalesFemales0%10%20%30%40%50%60%70%80%90%100%

Married

Widowed

Divorced

Separated

Never Married

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)