Longmont CO ZIP Code


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Longmont city is located in Colorado State, Boulder, Weld County and has a unique zip code assigned by the US Postal Service Office.


You can search for the Longmont CO zip code by its streets and block numbers if we have some of the Longmont streets loaded in our website

Longmont Area Code is 303/720 and Time Zone is Mountain (GMT -07:00).



Longmont Zip Code - Colorado

The US ZIP Code basic format consists of five decimal numerical digits assigned to the Longmont City. An extended ZIP+4 code, introduced in the 1980s, includes the five digits of the Longmont ZIP code, a hyphen, and four more digits that determine a more specific location within a given ZIP code in Longmont, Colorado.

The Longmont Zip Code is 80501, 80502, 80503, 80504.



If you want to send a mail to Longmont City, you should use the 80501, 80502, 80503, 80504 Zip Code.

In 1983, the U.S. Postal Service introduced an expanded Longmont 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 80501, 80502, 80503, 80504 Zip code plus four additional digits to identify a geographic segment within the five-digit delivery area, such as a Longmont 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 Colorado.


Longmont, Colorado - MAP



What is the Longmont Zip Code?

The Longmont Zip Code in Colorado is 80501, 80502, 80503, 80504.


ZIP Plus 4 Longmont - US Streets Zip Codes

By pressing keys ctrol + F you can search Longmont zip codes by its streets, highways, and know the ZIP+4 US ZIP Code


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Search Longmont Zip Code

What is the zip code for Longmont CO?

80501, 80502, 80503, 80504

Longmont, Colorado - US Zip Code



Longmont ZIP Code Lookup

80501, 80502, 80503, 80504 Zip Code File:
Zip Code: 80501, 80502, 80503, 80504,
City: Longmont
Longmont Area Code: 303/720
Longmont, CO - Time Zone: Mountain (GMT -07:00)
County: Boulder, Weld
City Alias: Longmont, Longmont, Longmont, Niwot, Firestone, Niwot, Frederick, Longmont
State: Colorado
State Abb: CO



Colorado Zip+4 - Nearby Longmont Cities

Cities near Longmont in Colorado
(straight line)


View more Colorado zip codes