Middletown MD ZIP Code
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Middletown city is located in Maryland State, Frederick County and has a unique zip code assigned by the US Postal Service Office.
You can search for the Middletown MD zip code by its streets and block numbers if we have some of the Middletown streets loaded in our website
Middletown Area Code is 240/301 and Time Zone is Eastern (GMT -05:00).
Middletown Zip Code - Maryland
The US ZIP Code basic format consists of five decimal numerical digits assigned to the Middletown City. An extended ZIP+4 code, introduced in the 1980s, includes the five digits of the Middletown ZIP code, a hyphen, and four more digits that determine a more specific location within a given ZIP code in Middletown, Maryland.
The Middletown Zip Code is 21769.
If you want to send a mail to Middletown City, you should use the 21769 Zip Code.
In 1983, the U.S. Postal Service introduced an expanded Middletown ZIP code system that it called ZIP+4, often called "plus-four codes", "add-on codes", or "add ons". A ZIP+4 code uses the basic 21769 Zip code plus four additional digits to identify a geographic segment within the five-digit delivery area, such as a Middletown city block, a group of apartments, an individual high-volume receiver of mail or any other unit that could use an extra identifier to aid in efficient mail sorting and delivery in Maryland.