Marriottsville MD ZIP Code
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Marriottsville city is located in Maryland State, Carroll County and has a unique zip code assigned by the US Postal Service Office.
You can search for the Marriottsville MD zip code by its streets and block numbers if we have some of the Marriottsville streets loaded in our website
Marriottsville Area Code is 443/410 and Time Zone is Eastern (GMT -05:00).
Marriottsville Zip Code - Maryland
The US ZIP Code basic format consists of five decimal numerical digits assigned to the Marriottsville City. An extended ZIP+4 code, introduced in the 1980s, includes the five digits of the Marriottsville ZIP code, a hyphen, and four more digits that determine a more specific location within a given ZIP code in Marriottsville, Maryland.
The Marriottsville Zip Code is 21104.
If you want to send a mail to Marriottsville City, you should use the 21104 Zip Code.
In 1983, the U.S. Postal Service introduced an expanded Marriottsville 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 21104 Zip code plus four additional digits to identify a geographic segment within the five-digit delivery area, such as a Marriottsville 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.