County · Illinois · United States
Iroquois County ZIP codes
24 ZIP codes · 24 cities · FIPS 17075
Key facts
- State
- Illinois (IL)
- FIPS code
- 17075
- Population
- 26,746
- Median household income
- $62,439
- Median age
- 44.4
- Land area
- 1,117.4 sq mi (2,894 km²)
- Population density
- 24 / sq mi
- Area codes
- 217, 447, 779, 815
Cities and ZIP codes in Iroquois County (24)
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.