US Gazetteer > Maryland Gazetteer > Maryland ZIP Codes > Rocky Ridge, MD 21778

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Rocky Ridge, MD 21778

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The 21778 ZIP Code is centered1 in Frederick County at latitude 39.614 and longitude -77.341 (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) 21778 was 1,020 with 382 housing units; a land area land area of 16.59 sq. miles; a water area of 0 sq. miles; and a population density of 61.50 people per sq. mile for Census 2000. Demographic Profile

Rocky Ridge, MD 21778 Map (Marker is ZIP Code Centroid)

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Nearby Cities, Towns & Census Designated Places

Loys, MD (< 0.1 mile)
Appolds, MD (1.4 miles NE)
Rocky Ridge, MD (1.4 miles ESE)
Emmitsburg Junction, MD (1.4 miles ESE)
Graceham, MD (2.4 miles W)
Creagerstown, MD (2.7 miles SSW)
Jimtown, MD (3.1 miles WSW)
Motters, MD (3.1 miles N)
Detour, MD (3.9 miles E)
Thurmont, MD (3.9 miles W)

Nearby Neighborhoods, Subdivisions & Other Small Populated Places

Vicmyer Vista, MD (1.4 miles ESE)
Phylpres, MD (1.9 miles E)
Rocky Ridge Estates, MD (1.9 miles ESE)
Bellemere Estates, MD (2.7 miles WNW)
Haughs Hideway, MD (3.4 miles ESE)
Gateway, MD (3.4 miles W)
Whispering Pines, MD (3.4 miles WNW)
Thornbrook, MD (3.4 miles NNW)
Ridgeview, MD (3.4 miles NW)
Jones, MD (3.4 miles NNW)

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.