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ZIP Code Database - Facts & Stats

Data Last Updated: November 1, 2022

ZIP Codes for City of Monrovia, MD

Monrovia, MD Covers 1 ZIP Code

ZIP CodeTypeCountyPopulation
ZIP Code 21770StandardFrederick5,164

Timezone(s):Eastern (GMT -05:00)
Population:416 (More Details)
Male Population:213
Female Population:203
Median Age:45
ZIP Codes:1
Area Codes:2
Total Area:667 square miles (county)
Land Area:660 square miles (county)
Water Area:7 square miles (county)

Monrovia, MD Demographic Information *

Total population416
Male population213
Female population203
Median age (years)44.6
White Population395
Black Population7
Indian Population1
Asian Population1
Hawaiian Population0
Hispanic Population19
Median age (Male)45.2
Median age (Female)43.3
Total households141
Family households (families)113
Average household size2.95
Average family size3.32
Total housing units148
* Demographic data is based on 2010 Census. Products


  1. U.S. Postal Service [Last Updated: 11/1/2022],
  2. Internal Data Creation [Last Updated: 11/1/2022],
  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],