County · Iowa · United States
Jefferson County ZIP codes
6 ZIP codes · 5 cities · FIPS 19101
Key facts
- State
- Iowa (IA)
- FIPS code
- 19101
- Population
- 15,676
- Median household income
- $56,824
- Median age
- 43.5
- Land area
- 435.5 sq mi (1,128 km²)
- Population density
- 36 / sq mi
- Area codes
- 319, 641
Cities and ZIP codes in Jefferson County (5)
| City | ZIP codes |
|---|---|
| Fairfield | 52556, 52557 |
| Batavia | 52533 |
| Libertyville | 52567 |
| Lockridge | 52635 |
| Packwood | 52580 |
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.