Mill Creek OK ZIP Code
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Mill Creek city is located in Oklahoma State, Johnston County and has a unique zip code assigned by the US Postal Service Office.
You can search for the Mill Creek OK zip code by its streets and block numbers if we have some of the Mill Creek streets loaded in our website
Mill Creek Area Code is 580 and Time Zone is Central (GMT -06:00).
Mill Creek Zip Code - Oklahoma
The US ZIP Code basic format consists of five decimal numerical digits assigned to the Mill Creek City. An extended ZIP+4 code, introduced in the 1980s, includes the five digits of the Mill Creek ZIP code, a hyphen, and four more digits that determine a more specific location within a given ZIP code in Mill Creek, Oklahoma.
The Mill Creek Zip Code is 74856.
If you want to send a mail to Mill Creek City, you should use the 74856 Zip Code.
In 1983, the U.S. Postal Service introduced an expanded Mill Creek 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 74856 Zip code plus four additional digits to identify a geographic segment within the five-digit delivery area, such as a Mill Creek 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 Oklahoma.