Every ZIP code in the United States, with weather, radar, trivia and the numbers behind it. Five digits since 1963!

ZIP stands for Zone Improvement Plan. The codes went live on July 1, 1963.The lowest ZIP code is 00501 — the IRS in Holtsville, New York.The highest ZIP code is 99950, in Ketchikan, Alaska.Type 07734 into a calculator and turn it upside down: hELLO. It is Keansburg, New Jersey.12345 belongs to one company: General Electric in Schenectady, New York.The first digit is a region: 0 is New England and New Jersey, 9 is the West Coast, Alaska and Hawaii.Mr. ZIP, the cartoon mailman, was the mascot that sold the idea to America.ZIP+4 arrived in 1983 and can narrow a ZIP down to one side of one block.A ZIP code is a mail route, not a place: plenty of them cross county and even state lines.Play ZIP Hunt: guess the secret ZIP code of the day in six tries.
zipcodes.pro — CITY/MD/MIDDLETOWN

Middletown ZIP code, Maryland

The ZIP code for Middletown, MD is 21769, and its area codes are 240, 227 and 301.

USPS city name
1 ZIP code
Population
5,014
Area codes
240, 227, 301

Middletown in numbers

About 5,014 people live in Middletown, in 1,726 households. The median household income is $173,333 a year, 67% above the Maryland median of $103,678 (US: $80,734). The median owner-occupied home is valued at $554,800 (32% above the Maryland median), and median gross rent is $1,813 a month. The median age is 40.8; 58.2% of adults 25 and over hold a bachelor's degree or higher (43.4% across Maryland); the average commute takes 33 minutes.

Population5,014Middletown5,014
Households1,726Middletown1,726
Median age40.8Middletown40.8Maryland39.4US 38.9
Median household income$173,333Middletown$173,333Maryland$103,678US $80,734
Median home value$554,800Middletown$554,800Maryland$419,900US $332,700
Median gross rent$1,813Middletown$1,813Maryland$1,705US $1,413
Bachelor's degree or higher58.2%Middletown58.2%Maryland43.4%US 35.7%
Mean commute33.1 minMiddletown33.1 minMaryland31.1 minUS 26.4 min
Population density2,367 / sq miMiddletown2,367 / sq mi

U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, for the census place Middletown town. Survey estimates carry margins of error, wider for small places. Sources and methods.

ZIP codes addressed as Middletown

ZIP codes with the USPS city name Middletown
ZIP City Type Population Median income Median home
21769 Middletown , MD Standard 11,965 $151,563 $507,000

Map of Middletown ZIP codes

21769

The ZIP codes of Middletown, MD, shaded. Outlines are Census ZIP Code Tabulation Areas (2020), which approximate the mail routes; PO-box and single-address codes have no area and are not drawn. Click any area to open its ZIP code.

Towns near Middletown

The nearest larger towns are Frederick (83,395 people, 6.5 mi), Ballenger Creek (26,390 people, 7.4 mi) and Walkersville (6,414 people, 9.4 mi).

Towns near Middletown
TownPopulationDistance
Braddock Heights 2,892 3.1 mi
Jefferson 3,314 5.3 mi
Frederick 83,395 6.5 mi
Ballenger Creek 26,390 7.4 mi
Boonsboro 3,809 8.4 mi
Walkersville 6,414 9.4 mi
Brunswick 8,450 9.8 mi
Bartonsville 3,282 10.4 mi
Spring Ridge 5,922 10.7 mi
Linganore 14,444 12.6 mi
Urbana 14,260 13.1 mi
Lovettsville, VA 2,719 13.1 mi
Thurmont 6,254 14.1 mi
Robinwood 8,042 14.5 mi

More nearby: every ZIP code in Frederick County · Maryland ZIP codes

Cite this page

zipcodes.pro. “Middletown, MD ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/city/md/middletown

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