ZIP code · Columbia · Maryland · United States
ZIP code 21045 — Columbia
ZIP code 21045 serves Columbia, Maryland.
- Postal code
- 21045Single source Value from one source, not cross-checked.
- City
- Columbia
- County
- Howard
- State
- Maryland
- Country
- United States
- Coordinates
- 39.2051, -76.8322 — precision precise (locality)
View on OpenStreetMap - Population
- 40,866 (ZCTA, ACS 5-year)
- Median household income
- $117,323
- Median age
- 38.4
Nearby localities
About this page
US ZIP codes have five digits. They are postal routing areas, not administrative boundaries: a ZIP can span more than one city or county, and the city shown is the primary USPS name for that code.
GeoNames · census-acs5. Data generated on 2026-08-21. Methodology · Report an error on this page