US Gazetteer > Maryland Gazetteer > Maryland ZIP Codes > Glen Arm, MD 21057

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Glen Arm, MD 21057

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The 21057 ZIP Code is centered1 in Baltimore County at latitude 39.449 and longitude -76.501 (Panoramio Photos). It is a standard type ZIP Code. Baltimore County is in the Eastern Time Zone (UTC -5 hours) and observes daylight savings time.

The population in ZIP Code Tabulation Area (ZCTA) 21057 was 4,144 with 1,523 housing units; a land area land area of 16.11 sq. miles; a water area of 0 sq. miles; and a population density of 257.20 people per sq. mile for Census 2000. Demographic Profile

Glen Arm, MD 21057 Map (Marker is ZIP Code Centroid)

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Nearby Cities, Towns & Census Designated Places

Glen Arm, MD (< 0.1 mile)
Notch Cliff, MD (< 0.1 mile)
Meadowcliff, MD (1.4 miles W)
Manor View, MD (1.4 miles WNW)
Gittings, MD (1.4 miles NNE)
Long Green, MD (1.9 miles NW)
Summerfield Farms, MD (1.9 miles SW)
Jenkins, MD (2.4 miles NNE)
Hunting Lodge, MD (2.4 miles SSW)
Harrington Manor, MD (2.4 miles SW)

Nearby Neighborhoods, Subdivisions & Other Small Populated Places

Greenwood Manor, MD (< 0.1 mile)
Greenwood, MD (1.4 miles SE)
Manor Springs, MD (1.4 miles W)
Manor Woods, MD (1.4 miles W)
Deer Woods, MD (1.4 miles WSW)
Halifax Heights, MD (1.9 miles W)
Lakeside, MD (1.9 miles WNW)
Summer Hill, MD (1.9 miles WSW)
Boordy Vineyards, MD (1.9 miles NNE)
Bonaparte Estates, MD (2.4 miles ENE)

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.