Cromwell IA ZIP Code
Cromwell city is located in Iowa State, Union County and has a unique zip code assigned by the US Postal Service Office.
You can search for the Cromwell IA zip code by its streets and block numbers if we have some of the Cromwell streets loaded in our website
Cromwell Area Code is 641 and Time Zone is Central (GMT -06:00).
Cromwell Zip Code - Iowa
The US ZIP Code basic format consists of five decimal numerical digits assigned to the Cromwell City. An extended ZIP+4 code, introduced in the 1980s, includes the five digits of the Cromwell ZIP code, a hyphen, and four more digits that determine a more specific location within a given ZIP code in Cromwell, Iowa.
The Cromwell Zip Code is 50842.
If you want to send a mail to Cromwell City, you should use the 50842 Zip Code.
In 1983, the U.S. Postal Service introduced an expanded Cromwell 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 50842 Zip code plus four additional digits to identify a geographic segment within the five-digit delivery area, such as a Cromwell 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.