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ZIP Code Database - Facts & Stats

Data Last Updated: June 1, 2023

ZIP Codes for City of Middletown, MD

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Area Code(s):240, 301
Timezone(s):Eastern (GMT -05:00)
City Population:4,136 (More Details)
CBSA:Washington-Arlington-Alexandria, DC-VA-MD-WV
Congressional District(s):06
Land Area:660 square miles (county)
Water Area:7 square miles (county)

1 ZIP Code

Middletown, MD ZIP Code Boundaries

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Middletown, MD Covers 1 ZIP Code

ZIP CodeTypePopulation% of PopulationAliases

Middletown, MD Demographic Information *

Total population**4,136
Male population2,017
Female population2,119
Median age (years)39.6
White Population3,802
Black Population116
Indian Population11
Asian Population114
Hawaiian Population3
Hispanic Population129
Median age (Male)38.4
Median age (Female)40.2
Total households1,484
Family households (families)1,166
Average household size2.79
Average family size3.16
Total housing units1,569
* Demographic data is based on 2010 Census for the City of MIDDLETOWN.
** City and ZIP Code Population will not be equal due to differences in their geographies.


  1. U.S. Postal Service [Last Updated: 2/1/2023],
  2. Internal Data Creation [Last Updated: 2/1/2023],
  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],