Alexander County, Illinois
6 ZIP codes · 235.39 sq mi of land · FIPS 17003
| Population | 4,875 |
|---|---|
| State | Illinois |
| FIPS code | 17003 |
| Time zone | Central |
| Land area | 235.39 sq mi |
| Center (lat, long) | 37.1837, -89.3495 |
Area codes in this area
These are the area codes that most often serve Alexander 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)
CairoMc ClureMiller CityOlive BranchTammsThebes
ZIP codes in Alexander County
Population: U.S. Census Bureau, ACS 5-year estimates, 2024.