US Gazetteer > Maryland Gazetteer > Maryland ZIP Codes > Mount Airy, MD 21771

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Mount Airy, MD 21771

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ZIP Code 21771 has segments in 4 Counties / Independent Cities (Carroll, Frederick, Howard, Montgomery).

The 21771 ZIP Code is centered1 in Frederick County at latitude 39.388 and longitude -77.148 (Panoramio Photos). It is a standard type ZIP Code. Frederick County is in the Eastern Time Zone (UTC -5 hours) and observes daylight savings time.

The population in ZIP Code Tabulation Area (ZCTA) 21771 was 25,694 with 8,449 housing units; a land area land area of 83.05 sq. miles; a water area of 0.01 sq. miles; and a population density of 309.39 people per sq. mile for Census 2000. Demographic Profile

Mount Airy, MD 21771 Map (Marker is ZIP Code Centroid)

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Nearby Cities, Towns & Census Designated Places

Dorceytown, MD (< 0.1 mile)
Mount Airy, MD (< 0.1 mile)
Parrsville, MD (1.9 miles S)
Ridgeville, MD (1.9 miles SSW)
Harrisville, MD (2.4 miles N)
Woodville, MD (2.4 miles NW)
Watersville, MD (2.7 miles ESE)
Gosnell, MD (3.1 miles ENE)
McDonald, MD (3.4 miles NNW)
Timber Ridge, MD (3.6 miles NE)

Nearby Neighborhoods, Subdivisions & Other Small Populated Places

Windsong Farms, MD (< 0.1 mile)
Ridgewood Estates, MD (< 0.1 mile)
Fair Wind Estates, MD (< 0.1 mile)
Christy Acres, MD (< 0.1 mile)
Candice Estates, MD (< 0.1 mile)
 Carroll Heights, MD (< 0.1 mile)
Chases Forest, MD (1.4 miles E)
Dales Delight, MD (1.4 miles ESE)
Gilboa, MD (1.4 miles E)
Airy Estates, MD (1.4 miles NNE)

ZIP Codes - Key Concepts

  1. ZIP Codes are categories for grouping mailing addresses and are not exact geographic regions.
  2. The centroid of a ZIP Code may be in one County and the associated city/town in another.
  3. In rural areas, a single ZIP Code may be used for cities and towns in several different Counties / Independent Cities.
  4. ZIP Code "areas" can overlap, be subsets of each other, or be artificial constructs with no geographic area.
  5. ZIP Codes are only loosely tied to cities.

1 Keeping the above key concepts in mind, what we informally refer to as the "center" of a ZIP Code is most often actually the centroid of a polygon.