ZIP code · Cooksville · Maryland · United States
ZIP code 21723 — Cooksville
ZIP code 21723 serves Cooksville, Maryland.
- Postal code
- 21723Single source Value from one source, not cross-checked.
- City
- Cooksville
- County
- Howard
- State
- Maryland
- Country
- United States
- Coordinates
- 39.3211, -77.0051 — precision precise (locality)
View on OpenStreetMap - Population
- 587 (ZCTA, ACS 5-year)
- Median household income
- $250,001
- Median age
- 41.7
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