County · Maryland · United States
Washington County ZIP codes
18 ZIP codes · 16 cities · FIPS 24043
Key facts
- State
- Maryland (MD)
- FIPS code
- 24043
- Population
- 155,033
- Median household income
- $74,157
- Median age
- 41
- Land area
- 457.8 sq mi (1,185.6 km²)
- Population density
- 339 / sq mi
- Area codes
- 227, 240, 301
Cities and ZIP codes in Washington County (16)
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.