County · Maryland · United States
Howard County ZIP codes
18 ZIP codes · 15 cities · FIPS 24027
Key facts
- State
- Maryland (MD)
- FIPS code
- 24027
- Population
- 333,916
- Median household income
- $146,982
- Median age
- 39.4
- Land area
- 251 sq mi (650 km²)
- Population density
- 1,331 / sq mi
- Area codes
- 227, 240, 301, 410, 443, 667
Cities and ZIP codes in Howard County (15)
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.