Oskaloosa IA ZIP Code
Oskaloosa city is located in Iowa State, Mahaska County and has a unique zip code assigned by the US Postal Service Office.
You can search for the Oskaloosa IA zip code by its streets and block numbers if we have some of the Oskaloosa streets loaded in our website
Oskaloosa Area Code is 641 and Time Zone is Central (GMT -06:00).
Oskaloosa Zip Code - Iowa
The US ZIP Code basic format consists of five decimal numerical digits assigned to the Oskaloosa City. An extended ZIP+4 code, introduced in the 1980s, includes the five digits of the Oskaloosa ZIP code, a hyphen, and four more digits that determine a more specific location within a given ZIP code in Oskaloosa, Iowa.
The Oskaloosa Zip Code is 52577.
If you want to send a mail to Oskaloosa City, you should use the 52577 Zip Code.
In 1983, the U.S. Postal Service introduced an expanded Oskaloosa 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 52577 Zip code plus four additional digits to identify a geographic segment within the five-digit delivery area, such as a Oskaloosa 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.