Gaithersburg MD ZIP Code
Gaithersburg city is located in Maryland State, Montgomery County and has a unique zip code assigned by the US Postal Service Office.
You can search for the Gaithersburg MD zip code by its streets and block numbers if we have some of the Gaithersburg streets loaded in our website
Gaithersburg Area Code is 301/240 and Time Zone is Eastern (GMT -05:00).
Gaithersburg Zip Code - Maryland
The US ZIP Code basic format consists of five decimal numerical digits assigned to the Gaithersburg City. An extended ZIP+4 code, introduced in the 1980s, includes the five digits of the Gaithersburg ZIP code, a hyphen, and four more digits that determine a more specific location within a given ZIP code in Gaithersburg, Maryland.
The Gaithersburg Zip Code is 20877, 20878, 20879, 20882, 20883, 20884, 20885, 20898, 20899.
If you want to send a mail to Gaithersburg City, you should use the 20877, 20878, 20879, 20882, 20883, 20884, 20885, 20898, 20899 Zip Code.
In 1983, the U.S. Postal Service introduced an expanded Gaithersburg 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 20877, 20878, 20879, 20882, 20883, 20884, 20885, 20898, 20899 Zip code plus four additional digits to identify a geographic segment within the five-digit delivery area, such as a Gaithersburg 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.