Johnstown CO ZIP Code
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Johnstown city is located in Colorado State, Weld County and has a unique zip code assigned by the US Postal Service Office.
You can search for the Johnstown CO zip code by its streets and block numbers if we have some of the Johnstown streets loaded in our website
Johnstown Area Code is 970 and Time Zone is Mountain (GMT -07:00).
Johnstown Zip Code - Colorado
The US ZIP Code basic format consists of five decimal numerical digits assigned to the Johnstown City. An extended ZIP+4 code, introduced in the 1980s, includes the five digits of the Johnstown ZIP code, a hyphen, and four more digits that determine a more specific location within a given ZIP code in Johnstown, Colorado.
The Johnstown Zip Code is 80534.
If you want to send a mail to Johnstown City, you should use the 80534 Zip Code.
In 1983, the U.S. Postal Service introduced an expanded Johnstown 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 80534 Zip code plus four additional digits to identify a geographic segment within the five-digit delivery area, such as a Johnstown 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.