20859 ZIP Code Profile, Map, Data & Demographics

Related Place Profiles:
Potomac, MD | Rockville, MD
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ZIP Code 20859: Basic Data & USPS Preferred City Name

Preferred Name, USPS
Potomac, MD 20859

Acceptable Alternative
Rockville, MD 20859

  • ZIP Code Type: PO BOX
  • County: Montgomery County
  • Centroid: Latitude 39.023, Longitude -77.199
  • Time Zone: Eastern Time Zone (UTC -5 hours)
  • Observes DST: Yes
  • Businesses Addresses: 280
  • PO Box Addresses: 277
  • Residential Addresses: 277
    • Multi-Family Addresses: 0
    • Single Family Addresses: 0

The ZIP Code maps and database are updated 4 times per year.
Database updated: March 1, 2026, Maps updated: May 1, 2024.

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Potomac, MD 20859 Data & Demographics

Source: 2020-2024 American Community Survey 5-Year Estimates



    ZIP Code 20859 is a PO Box ZIP Code. There is no demographic data available for this type of ZIP Code. However, ZIP Code 20859 is contained within ZIP Code 20854 and perhaps demographic information for this ZIP Code would be of interest to you: ZIP Code 20854 Demographic Information.

Nearby Cities, Towns & Census Designated Places

Potomac, MD (0.5 miles WSW)
Cabin John, MD (3.8 miles SE)
North Bethesda, MD (4.7 miles ENE)
Glen Echo, MD (4.7 miles SE)
Travilah, MD (4.8 miles NW)
Great Falls, VA (5 miles WSW)
Rockville, MD (5.1 miles NNE)
North Potomac, MD (5.6 miles NW)
Garrett Park, MD (5.9 miles ENE)
Bethesda, MD (6 miles ESE)

Nearby Neighborhoods, Subdivisions & Other Small Populated Places

Williamsburg Estates, MD (0.8 miles S)
Potomac Glen, MD (1 miles NW)
Bradley Farms, MD (1 miles SSE)
McAuley Park, MD (1.1 miles E)
Potomac Manors, MD (1.2 miles W)
Pine Knolls, MD (1.2 miles NNE)
Campbell Corner, MD (1.6 miles SE)
Potomac Falls, MD (1.7 miles WSW)
Lake Normandy Estates, MD (1.7 miles NNE)
Fawsett Farms, MD (1.9 miles SW)

Popular Places Near ZIP Code 20859


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