County · Kansas · United States
Allen County ZIP codes
7 ZIP codes · 7 cities · FIPS 20001
Key facts
- State
- Kansas (KS)
- FIPS code
- 20001
- Population
- 12,491
- Median household income
- $57,618
- Median age
- 41.3
- Land area
- 500.3 sq mi (1,295.8 km²)
- Population density
- 25 / sq mi
- Area codes
- 620
Cities and ZIP codes in Allen County (7)
| City | ZIP codes |
|---|---|
| Elsmore | 66732 |
| Gas | 66742 |
| Humboldt | 66748 |
| Iola | 66749 |
| La Harpe | 66751 |
| Moran | 66755 |
| Savonburg | 66772 |
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.