About ZIP Code 21771
ZIP code 21771 is assigned to Mount Airy, Frederick County, Maryland, United States. It falls in the Eastern Time (ET) zone. The estimated population of this ZIP code area is 33,031 with a density of 142.5 people per square mile.
Location Details
ZIP Code21771
CityMount Airy
CountyFrederick County
StateMaryland
CountryUnited States
TimezoneEastern Time (ET)
Timezone IDAmerica/New_York
Latitude39.3955
Longitude-77.1587
ZIP TypeStandard ZIP
Post Office
Address505 WINDY KNOLL DR
CityMOUNT AIRY
StateMD
Nearby ZIP Codes in Maryland
Frequently Asked Questions
What city is ZIP code 21771 in?
ZIP code 21771 is in Mount Airy, Frederick County, Maryland, United States.
What county is ZIP code 21771 in?
ZIP code 21771 is in Frederick County, Maryland.
What timezone is ZIP code 21771 in?
ZIP code 21771 is in the Eastern Time (ET) zone (America/New_York).
What is the population of ZIP code 21771?
The estimated population of ZIP code 21771 is 33,031 people with a density of 142.5 people per square mile.
What state is ZIP code 21771 in?
ZIP code 21771 is in Maryland (MD), United States.
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Data Source: United States Postal Service (USPS) & US Census Bureau (ZCTA data) · Public domain government data. For official ZIP code information visit tools.usps.com. Data is periodically updated but may not reflect the most recent changes.