ZIP code · Frederick · Maryland · United States

ZIP code 21704 — Frederick

Name: Frederick (21704)
Address: Maryland, 21704, US

ZIP code 21704 serves Frederick, Maryland.

Postal code: 21704
Single source Value from one source, not cross-checked.
City: Frederick
County: Frederick
State: Maryland
Country: United States
Coordinates: 39.3455, -77.3832 — precision precise (locality)
View on OpenStreetMap
Population: 19,623 (ZCTA, ACS 5-year)
Median household income: $164,457
Median age: 38.4
Time zone: America/New_York (UTC−5 / UTC−4 DST)

Nearby localities

21717Buckeystown · 4.1 km
21754Ijamsville · 7.8 km
21710Adamstown · 8.7 km
21770Monrovia · 12 km
21774New Market · 12 km
21714Braddock Heights · 13 km
20838Barnesville · 14 km
21790Tuscarora · 14 km
21755Jefferson · 14 km
21777Point Of Rocks · 15 km

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 · U.S. Census Bureau (ACS). Data generated on 2026-08-21. Methodology · Report an error on this page