In 2023, Rock Island Arsenal, IL had a population of 372 people with a median age of 43.1 and a median household income of $53,472. Between 2022 and 2023 the population of Rock Island Arsenal, IL declined from 375 to 372, a −0.8% decrease and its median household income grew from $50,972 to $53,472, a 4.9% increase.
The 5 largest ethnic groups in Rock Island Arsenal, IL are Two+ (Non-Hispanic) (65.9%), White (Non-Hispanic) (22%), Other (Hispanic) (7.53%), Other (Non-Hispanic) (2.42%), and Two+ (Hispanic) (1.34%).
None of the households in Rock Island Arsenal, IL reported speaking a non-English language at home as their primary shared language. This does not consider the potential multi-lingual nature of households, but only the primary self-reported language spoken by all members of the household.
100% of the residents in Rock Island Arsenal, IL are U.S. citizens.
Most people in Rock Island Arsenal, IL drove alone to work, and the average commute time was 5.5 minutes. The average car ownership in Rock Island Arsenal, IL was 2 cars per household.