Niwot CO ZIP Code
Niwot city is located in Colorado State, Boulder County and has a unique zip code assigned by the US Postal Service Office.
You can search for the Niwot CO zip code by its streets and block numbers if we have some of the Niwot streets loaded in our website
Niwot Area Code is 303 and Time Zone is Mountain (GMT -07:00).
Niwot Zip Code - Colorado
The US ZIP Code basic format consists of five decimal numerical digits assigned to the Niwot City. An extended ZIP+4 code, introduced in the 1980s, includes the five digits of the Niwot ZIP code, a hyphen, and four more digits that determine a more specific location within a given ZIP code in Niwot, Colorado.
The Niwot Zip Code is 80544.
If you want to send a mail to Niwot City, you should use the 80544 Zip Code.
In 1983, the U.S. Postal Service introduced an expanded Niwot 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 80544 Zip code plus four additional digits to identify a geographic segment within the five-digit delivery area, such as a Niwot 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.