County · Illinois · United States
Winnebago County ZIP codes
20 ZIP codes · 12 cities · FIPS 17201
Key facts
- State
- Illinois (IL)
- FIPS code
- 17201
- Population
- 283,289
- Median household income
- $64,363
- Median age
- 39.7
- Land area
- 513 sq mi (1,328.8 km²)
- Population density
- 552 / sq mi
- Area codes
- 779, 815
Cities and ZIP codes in Winnebago County (12)
| City | ZIP codes |
|---|---|
| Rockford | 61101, 61102, 61103, 61104, 61107, 61108, 61109, 61112, 61114 |
| Cherry Valley | 61016 |
| Durand | 61024 |
| Loves Park | 61111 |
| Machesney Park | 61115 |
| Pecatonica | 61063 |
| Rockton | 61072 |
| Roscoe | 61073 |
| Seward | 61077 |
| Shirland | 61079 |
| South Beloit | 61080 |
| Winnebago | 61088 |
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.