County · Illinois · United States
Stephenson County ZIP codes
14 ZIP codes · 14 cities · FIPS 17177
Key facts
- State
- Illinois (IL)
- FIPS code
- 17177
- Population
- 44,042
- Median household income
- $61,943
- Median age
- 45.2
- Land area
- 564.2 sq mi (1,461.4 km²)
- Population density
- 78 / sq mi
- Area codes
- 779, 815
Cities and ZIP codes in Stephenson County (14)
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.