Middle River MD ZIP Code
Middle River city is located in Maryland State, Baltimore County and has a unique zip code assigned by the US Postal Service Office.
You can search for the Middle River MD zip code by its streets and block numbers if we have some of the Middle River streets loaded in our website
Middle River Area Code is 443/410 and Time Zone is Eastern (GMT -05:00).
Middle River Zip Code - Maryland
The US ZIP Code basic format consists of five decimal numerical digits assigned to the Middle River City. An extended ZIP+4 code, introduced in the 1980s, includes the five digits of the Middle River ZIP code, a hyphen, and four more digits that determine a more specific location within a given ZIP code in Middle River, Maryland.
The Middle River Zip Code is 21220.
If you want to send a mail to Middle River City, you should use the 21220 Zip Code.
In 1983, the U.S. Postal Service introduced an expanded Middle River 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 21220 Zip code plus four additional digits to identify a geographic segment within the five-digit delivery area, such as a Middle River 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.