Fort Sill OK ZIP Code
Fort Sill city is located in Oklahoma State, Comanche County and has a unique zip code assigned by the US Postal Service Office.
You can search for the Fort Sill OK zip code by its streets and block numbers if we have some of the Fort Sill streets loaded in our website
Fort Sill Area Code is 580 and Time Zone is Central (GMT -06:00).
Fort Sill Zip Code - Oklahoma
The US ZIP Code basic format consists of five decimal numerical digits assigned to the Fort Sill City. An extended ZIP+4 code, introduced in the 1980s, includes the five digits of the Fort Sill ZIP code, a hyphen, and four more digits that determine a more specific location within a given ZIP code in Fort Sill, Oklahoma.
The Fort Sill Zip Code is 73503.
If you want to send a mail to Fort Sill City, you should use the 73503 Zip Code.
In 1983, the U.S. Postal Service introduced an expanded Fort Sill 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 73503 Zip code plus four additional digits to identify a geographic segment within the five-digit delivery area, such as a Fort Sill 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.