Warren County, Illinois
8 ZIP codes · 542.32 sq mi of land · FIPS 17187
| Population | 16,447 |
|---|---|
| State | Illinois |
| FIPS code | 17187 |
| Time zone | Central |
| Land area | 542.32 sq mi |
| Center (lat, long) | 40.8504, -90.6202 |
Area codes in this area
These are the area codes that most often serve Warren County (including overlays). The exact area code depends on the phone number — landlines, mobiles and overlays can differ even on the same street.
Cities and towns (largest first)
BerwickCameronGerlawKirkwoodLittle YorkMonmouthRosevilleSmithshire
ZIP codes in Warren County
61417 Berwick61423 Cameron61435 Gerlaw61447 Kirkwood61453 Little York61462 Monmouth61473 Roseville61478 Smithshire
Population: U.S. Census Bureau, ACS 5-year estimates, 2024.