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 2026 population of 22. Illinois City is currently growing at a rate of 4.76% annually and its population has decreased by 0% since the most recent census, which recorded a population of 0 in 2020.

The median age in Illinois City is 25.5 years: 62.1 years for males, and 25.4 years for females. For every 100 females there are 78.0 males.

22
Total Population
48
Density (mi²)
1 4.76%
Growth

Illinois City Population

Illinois City Population

Data after 2023 is projected based on recent change

Year ↓
Population
Growth
Annual Change
20262214.76%
202521210.53%

Median Age

Overall: 25.5 years
Female: 25.4 years
Male: 62.1 years

Illinois City Adults

There are 73 adults, (16 of whom are seniors) in Illinois City.

Sex Ratio

Female: 41 (56.2%)
Male: 32 (43.8%)

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)
White73100%
Race
Population ↓
Percentage (of total)
White73100%

Illinois City Marital Status

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)