Jefferson IA ZIP Code
Jefferson city is located in Iowa State, Greene County and has a unique zip code assigned by the US Postal Service Office.
You can search for the Jefferson IA zip code by its streets and block numbers if we have some of the Jefferson streets loaded in our website
Jefferson Area Code is 515 and Time Zone is Central (GMT -06:00).
Jefferson Zip Code - Iowa
The US ZIP Code basic format consists of five decimal numerical digits assigned to the Jefferson City. An extended ZIP+4 code, introduced in the 1980s, includes the five digits of the Jefferson ZIP code, a hyphen, and four more digits that determine a more specific location within a given ZIP code in Jefferson, Iowa.
The Jefferson Zip Code is 50129.
If you want to send a mail to Jefferson City, you should use the 50129 Zip Code.
In 1983, the U.S. Postal Service introduced an expanded Jefferson 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 50129 Zip code plus four additional digits to identify a geographic segment within the five-digit delivery area, such as a Jefferson 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 Iowa.