County · Illinois · United States
Knox County ZIP codes
17 ZIP codes · 16 cities · FIPS 17095
Key facts
- State
- Illinois (IL)
- FIPS code
- 17095
- Population
- 49,294
- Median household income
- $53,291
- Median age
- 42.4
- Land area
- 716.4 sq mi (1,855.4 km²)
- Population density
- 69 / sq mi
- Area codes
- 309
Cities and ZIP codes in Knox County (16)
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.