Rock Island Arsenal CDP, Illinois Demographics & Population 2026

Population Overview

Rock Island Arsenal CDP is a small community located in Illinois. The total population is 372. It ranks as the 1023rd most populous out of 1,445 cities and towns in Illinois.

Age Demographics

The median age in Rock Island Arsenal CDP is 43.1 years. This is 11% higher than the state median of 38.9 years. With 34.9% of the population under 18, Rock Island Arsenal CDP has a notably young demographic profile, suggesting a family-oriented community.

Economy, Income & Housing

The median household income in Rock Island Arsenal CDP is $53,472. This is 35% lower than the state median of $81,702. Compared to the national median of $78,538, household income here is 32% lower. The poverty rate stands at 0.0%. This is 100% lower than the state poverty rate of 11.7%. This exceptionally low poverty rate indicates strong economic prosperity across the community. The unemployment rate is 23.8%. This is 311% higher than the state rate of 5.8%. 0.0% of occupied housing units are owner-occupied. This homeownership rate is 100% lower than the state average of 66.8%.

Race & Ethnicity

Rock Island Arsenal CDP is a highly diverse community where no single racial or ethnic group constitutes a majority of the population. Hispanic or Latino residents account for 8.9%. The White (non-Hispanic) population (22.0%) is well below the state average of 58.8%. The Black or African American population (0.8%) is well below the state average of 13.6%. The Hispanic or Latino population (8.9%) is well below the state average of 18.5%.

Education

7.0% of residents aged 25 and older hold a bachelor's degree or higher. This is 81% lower than the state rate of 37.2%. Nationally, 35.0% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 88.4%.

Data Sources & Methodology

All demographic data for Rock Island Arsenal CDP, Illinois is sourced from the U.S. Census Bureau's American Community Survey (ACS) 5-Year Estimates (2019-2023). The ACS collects data from approximately 3.5 million households annually, providing reliable estimates for communities of all sizes. Comparisons are made against Illinois state averages and national averages calculated from the same dataset. Rankings reflect the city's position among all 1,445 Census-designated places in Illinois. For official data, visit data.census.gov.