County · Illinois · United States
Rock Island County ZIP codes
18 ZIP codes · 18 cities · FIPS 17161
Key facts
- State
- Illinois (IL)
- FIPS code
- 17161
- Population
- 142,995
- Median household income
- $66,768
- Median age
- 40.3
- Land area
- 427.5 sq mi (1,107.2 km²)
- Population density
- 334 / sq mi
- Area codes
- 217, 309, 447
Cities and ZIP codes in Rock Island County (18)
About this page
County figures are Census county-level values (ACS 5-year); the ZIP list shows the ZIPs whose primary county this is — a ZIP on a border can also serve neighbouring counties.
Sources: U.S. Census Bureau (2020 county relationship file, ACS 5-year) · GeoNames. Methodology.