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ZIP Code Database - Facts & Stats

Data Last Updated: October 1, 2021

ZIP Codes for City of Potomac, MD

Potomac, MD Covers 3 ZIP Codes

ZIP CodeTypeCountyPopulationArea Code(s)
ZIP Code 20850StandardMontgomery46,340240 / 301
ZIP Code 20854StandardMontgomery49,611301
ZIP Code 20859P.O. BoxMontgomery0301

Timezone(s):Eastern (GMT -05:00)
Population:44,965 (More Details)
Male Population:21,512
Female Population:23,453
Median Age:47
ZIP Codes:3
Area Codes:2
Total Area:507 square miles (county)
Land Area:493 square miles (county)
Water Area:14 square miles (county)

Potomac, MD Demographic Information *

Total population44,965
Male population21,512
Female population23,453
Median age (years)46.9
White Population34,080
Black Population2,076
Indian Population40
Asian Population7,169
Hawaiian Population16
Hispanic Population2,857
Median age (Male)46.4
Median age (Female)47.3
Total households16,103
Family households (families)13,064
Average household size2.77
Average family size3.09
Total housing units16,642
* Demographic data is based on 2010 Census.

Potomac, MD Other Information

192 Cities within 30 miles of Potomac, MD Products


  1. U.S. Postal Service [Last Updated: 10/1/2021],
  2. Internal Data Creation [Last Updated: 10/1/2021],
  3. U.S. Geological Survey [Updated as needed],
  4. U.S. Census [Updated Yearly],
  5. U.S. Census 2010 [Decennial] [Last Updated: 1/1/2010],