Olney MD ZIP Code
Olney 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 Olney MD zip code by its streets and block numbers if we have some of the Olney streets loaded in our website
Olney Area Code is 240/301 and Time Zone is Eastern (GMT -05:00).
Olney Zip Code - Maryland
The US ZIP Code basic format consists of five decimal numerical digits assigned to the Olney City. An extended ZIP+4 code, introduced in the 1980s, includes the five digits of the Olney ZIP code, a hyphen, and four more digits that determine a more specific location within a given ZIP code in Olney, Maryland.
The Olney Zip Code is 20830, 20832.
If you want to send a mail to Olney City, you should use the 20830, 20832 Zip Code.
In 1983, the U.S. Postal Service introduced an expanded Olney 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 20830, 20832 Zip code plus four additional digits to identify a geographic segment within the five-digit delivery area, such as a Olney 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.