Mount Airy, Maryland | |
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![]() Main Street in Mt. Airy | |
![]() Location in Carroll County | |
![]() Location in Frederick County | |
Coordinates: 39°22′29″N 77°9′20″W / 39.37472°N 77.15556°W | |
Country | ![]() |
State | ![]() |
Counties | Frederick, Carroll |
Settled | 1830 |
Incorporation | 1894[1] |
Government | |
• Type | Mayor-Council |
Area | |
• Total | 4.13 sq mi (10.71 km2) |
• Land | 4.12 sq mi (10.68 km2) |
• Water | 0.01 sq mi (0.03 km2) |
Elevation | 764 ft (233 m) |
Population (2020) | |
• Total | 9,654 |
• Density | 2,343.20/sq mi (904.71/km2) |
Time zone | UTC-5 (Eastern (EST)) |
• Summer (DST) | UTC-4 (EDT) |
ZIP code | 21771 |
Area code(s) | 301, 240[4] |
FIPS code | 24-53875 |
GNIS feature ID | 2391316[3] |
Website | www |
Mount Airy is a town in Carroll and Frederick counties in the U.S. state of Maryland. It is part of both the Washington Metropolitan Area and Baltimore Metropolitan Area. As of the 2010 census the population was 9,288.[5]
Outside the town limits, the surrounding countryside is colloquially referred to as Mount Airy or the "Four-County Area" by locals.[6] The "Four-County Area" derives its name from the fact that the "Mount Airy" mailing area encompasses portions of Frederick, Carroll, Montgomery, and Howard counties.