County · Nebraska · United States
Polk County ZIP codes
4 ZIP codes · 4 cities · FIPS 31143
Key facts
- State
- Nebraska (NE)
- FIPS code
- 31143
- Population
- 5,209
- Median household income
- $71,771
- Median age
- 43.7
- Land area
- 438.7 sq mi (1,136.2 km²)
- Population density
- 12 / sq mi
- Area codes
- 402, 531
Cities and ZIP codes in Polk County (4)
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.