Rock Island Flag

Rock Island

County Seat:
Yes
Area (mi²):
17.535
State:
Illinois

Rock Island is a city located in Rock Island County, Illinois. Rock Island has a 2026 population of 36,434. It is also the county seat of Rock Island County. Rock Island is currently growing at a rate of 0.38% annually but its population has decreased by -1.56% since the most recent census, which recorded a population of 37,010 in 2020.

36.4K
Total Population
2,078
Density (mi²)
138 0.38%
Growth

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)