Rock Island County, Illinois
Rock Island County is a county in Illinois. Its county FIPS code is 17161. Use the boundary map and neighboring areas below to check the jurisdiction you need.
- Official code
- 17161
- Representative coordinates
- 41.468421, -90.572125
- County type
- County
- County seat or government
- Rock Island
- Resident population, July 2025
- 141,869
- Land area
- 1,107.212 km²
- Water area
- 61.631 km²
- State
- Illinois
The representative point identifies this area. It is not a street address or a boundary survey.
Time zones in Rock Island County
| Time zone | Local time and UTC offset | Next clock change |
|---|---|---|
| America/Chicago | UTC-06:00 in January; UTC-05:00 in July. Enable JavaScript for the live clock. | Enable JavaScript for upcoming changes. |
Listed zones overlap the mapped area. A point lookup can distinguish sides of a boundary. Your device’s zone may differ.
Census ZIP areas
61201 · 61232 · 61236 · 61237 · 61239 · 61240 · 61242 · 61244 · 61256 · 61257 · 61259 · 61264 · 61265 · 61272 · 61273 · 61275 · 61278 · 61279 · 61281 · 61282 · 61284
These statistical areas overlap the boundary. They are not delivery assignments; confirm mailing details with USPS ZIP Code Lookup.
Official county information
Rock Island County government website ↗ is the next stop for county offices, tax, voting, jury and records information. A geographic lookup cannot determine eligibility, tax liability or a court obligation.
Cities, towns and communities
These areas overlap the mapped boundary; an overlap does not mean that every address belongs to both.
- Andalusia village, IL
- Barstow CDP, IL
- Buffalo Prairie CDP, IL
- Campbell's Island CDP, IL
- Carbon Cliff village, IL
- Coal Valley village, IL
- Cordova village, IL
- Coyne Center CDP, IL
- East Moline city, IL
- Edgington CDP, IL
- Hampton village, IL
- Hillsdale village, IL
- Illinois City CDP, IL
- Joslin CDP, IL
- Milan village, IL
- Moline city, IL
- Oak Grove village, IL
- Port Byron village, IL
- Rapids City village, IL
- Reynolds village, IL
- Rock Island city, IL
- Rock Island Arsenal CDP, IL
- Silvis city, IL
- Taylor Ridge CDP, IL
Areas sharing the mapped boundary
These areas touch this mapped boundary.
Before using this answer on a form
Use a precise point for address-level questions. A device accuracy circle can cross a boundary; confirm tax, voting or jury details with the responsible office.
Find the county at your current point, check its ZIP area, or find its physical time zone.