ZIP code 21771 — Mount Airy

Postal code

21771Copy

Single source Value from one source, not cross-checked.

City

Mount Airy

County

Frederick FIPS 24021

State

Maryland

Country

United States

Coordinates

39.3881, -77.1723 — precision estimated (postal-area centroid)
View on OpenStreetMap

Population

32,827 (ZCTA, ACS 5-year)

Population density

367 / sq mi

Land area

89.5 sq mi (231.9 km²) (ZCTA, ACS 5-year)

Median household income

$154,844

Per-capita income

$57,250

Median age

41.4

Households

10,879

Housing units

11,401

Median home value

$532,200

Median gross rent

$2,117 / month

Congressional districts

MD-6 (also MD-3, MD-2) (119th Congress)

USDA hardiness zone

7a (0 to 5 °F)

Planting / growing zone from the 2023 USDA Plant Hardiness Zone Map: average annual extreme minimum temperature, 1991–2020.

Time zone

America/New_York (UTC−5 / UTC−4 DST)

Area codes

240, 301, 227

Telephone area codes serving this ZIP (NANPA central-office assignments). A ZIP and an area code are different boundaries; at a border both codes may apply.

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