US Gazetteer > Maryland Gazetteer > Maryland ZIP Codes > Rockville, MD 20857

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Preferred Name, USPS
Rockville, MD 20857
Not Acceptable, USPS
HHS, MD 20857

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Weather forecast ZIP Code 20857

The 20857 ZIP Code is centered1 in Montgomery County at latitude 39.079 and longitude -77.156 (Panoramio Photos). It is a unique - single entity - type ZIP Code. Montgomery County is in the Eastern Time Zone (UTC -5 hours) and observes daylight savings time.

Rockville, MD 20857 Map (Marker is ZIP Code Centroid)

Local Search, 20857 ZIP Code| Distance & Driving Directions

Nearby Cities, Towns & Census Designated Places

West End Park, MD (< 0.1 mile)
Hungerford Towne, MD (< 0.1 mile)
Croydon Park, MD (< 0.1 mile)
Rockville, MD (< 0.1 mile)
Beantown, MD (1.4 miles NE)
Falls Orchard, MD (1.4 miles SW)
Potomac Woods, MD (1.4 miles SSW)
Westmore, MD (1.4 miles N)
Woodley Gardens, MD (1.4 miles NNW)
Silver Rock, MD (1.4 miles E)

Nearby Neighborhoods, Subdivisions & Other Small Populated Places

North Farm, MD (1.4 miles SSE)
Fallsgrove, MD (1.9 miles WNW)
Inverness Knolls, MD (2.4 miles S)
Needwood Estates, MD (3.1 miles N)
Stonebridge, MD (3.4 miles WNW)
Heritage Walk, MD (3.4 miles SSE)
Candlewood Park, MD (3.4 miles N)
Walnut Hill, MD (3.6 miles NNW)
Rosemont, MD (3.9 miles NNW)
Oakmont Manor, MD (3.9 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.