US Gazetteer > Maryland Gazetteer > Maryland ZIP Codes > Rockville, MD 20851

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Preferred Name, USPS
Rockville, MD 20851

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Weather forecast ZIP Code 20851

The 20851 ZIP Code is centered1 in Montgomery County at latitude 39.077 and longitude -77.126. It is a standard type ZIP Code. Montgomery County is in the Eastern Time Zone (UTC -5 hours) and observes daylight savings time.

The population in ZIP Code Tabulation Area (ZCTA) 20851 was 13,038 with 4,746 housing units; a land area land area of 2.36 sq. miles; a water area of 0 sq. miles; and a population density of 5,525.28 people per sq. mile for Census 2000. Demographic Profile

Rockville, MD 20851 Map (Marker is ZIP Code Centroid)

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Nearby Cities, Towns & Census Designated Places

Twin Brook, MD (< 0.1 mile)
Twin Brook Forest, MD (< 0.1 mile)
Silver Rock, MD (< 0.1 mile)
Rockland, MD (< 0.1 mile)
Rockcrest, MD (< 0.1 mile)
 Broadwood Manor, MD (< 0.1 mile)
Beantown, MD (1.4 miles NNW)
Rockville, MD (1.4 miles WNW)
Croydon Park, MD (1.4 miles NW)
Rollins Park, MD (1.4 miles S)

Nearby Neighborhoods, Subdivisions & Other Small Populated Places

North Farm, MD (1.9 miles SW)
Inverness Knolls, MD (2.7 miles SW)
Heritage Walk, MD (3.1 miles S)
Georgian Colonies, MD (3.1 miles ENE)
Needwood Estates, MD (3.4 miles NNW)
Manor Village, MD (3.4 miles NE)
Fallsgrove, MD (3.6 miles WNW)
Candlewood Park, MD (3.6 miles NNW)
Cashell Estates, MD (4.1 miles N)
College View, MD (4.1 miles SE)

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.