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ZIP Code Database - Facts & Stats

Data Last Updated: December 1, 2022

ZIP Codes for City of Rockville, MD

Rockville, MD Covers 11 ZIP Codes

ZIP CodeTypeCountyPopulation
ZIP Code 20847P.O. BoxMontgomery0
ZIP Code 20848P.O. BoxMontgomery0
ZIP Code 20849P.O. BoxMontgomery0
ZIP Code 20850StandardMontgomery46,340
ZIP Code 20851StandardMontgomery14,191
ZIP Code 20852StandardMontgomery40,365
ZIP Code 20853StandardMontgomery29,673
ZIP Code 20854StandardMontgomery49,611
ZIP Code 20855StandardMontgomery14,295
ZIP Code 20857UniqueMontgomery0
ZIP Code 20859P.O. BoxMontgomery0

Timezone(s):Eastern (GMT -05:00)
Population:61,209 (More Details)
Male Population:29,340
Female Population:31,869
Median Age:39
ZIP Codes:11
Area Codes:2
Total Area:507 square miles (county)
Land Area:493 square miles (county)
Water Area:14 square miles (county)

Rockville, MD Demographic Information *

Total population61,209
Male population29,340
Female population31,869
Median age (years)38.7
White Population36,973
Black Population5,858
Indian Population205
Asian Population12,582
Hawaiian Population27
Hispanic Population8,781
Median age (Male)37.3
Median age (Female)40
Total households23,686
Family households (families)15,524
Average household size2.54
Average family size3.08
Total housing units25,199
* Demographic data is based on 2010 Census. Products


  1. U.S. Postal Service [Last Updated: 12/1/2022],
  2. Internal Data Creation [Last Updated: 12/1/2022],
  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],