Rock Island Arsenal Flag

Rock Island Arsenal

County Seat:
No
Area (mi²):
1.572
State:
Illinois

Rock Island Arsenal is a CDP located in Rock Island County, Illinois. Rock Island Arsenal has a 2026 population of 423. Rock Island Arsenal is currently growing at a rate of 4.19% 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 Rock Island Arsenal is 39.3 years: 46.2 years for males, and 27.5 years for females. For every 100 females there are 119.6 males.

423
Total Population
269
Density (mi²)
17 4.19%
Growth

Rock Island Arsenal Population

Rock Island Arsenal Population

Data after 2023 is projected based on recent change

Year ↓
Population
Growth
Annual Change
2026423174.19%
2025406174.37%

Median Age

Overall: 39.3 years
Female: 27.5 years
Male: 46.2 years

Rock Island Arsenal Adults

There are 277 adults, (14 of whom are seniors) in Rock Island Arsenal.

Sex Ratio

Female: 214 (45.5%)
Male: 256 (54.5%)

Demographics

The racial composition of Rock Island Arsenal includes 38.51% White, 8.72% other race, and smaller percentages for Black or African American and multiracial populations.

Population by Race

Race
Population ↓
Percentage (of total)
Two or more races24552.13%
White18138.51%
Other race418.72%
Black or African American30.64%
Race
Population ↓
Percentage (of total)
Other race296.17%
Two or more races71.49%
Race
Population ↓
Percentage (of total)
Two or more races23850.64%
White18138.51%
Other race122.55%
Black or African American30.64%

Rock Island Arsenal 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)