Oshkosh WI ZIP Code
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Oshkosh city is located in Wisconsin State, Winnebago County and has a unique zip code assigned by the US Postal Service Office.
You can search for the Oshkosh WI zip code by its streets and block numbers if we have some of the Oshkosh streets loaded in our website
Oshkosh Area Code is 920 and Time Zone is Central (GMT -06:00).
Oshkosh Zip Code - Wisconsin
The US ZIP Code basic format consists of five decimal numerical digits assigned to the Oshkosh City. An extended ZIP+4 code, introduced in the 1980s, includes the five digits of the Oshkosh ZIP code, a hyphen, and four more digits that determine a more specific location within a given ZIP code in Oshkosh, Wisconsin.
The Oshkosh Zip Code is 54901, 54902, 54903, 54904, 54906.
If you want to send a mail to Oshkosh City, you should use the 54901, 54902, 54903, 54904, 54906 Zip Code.
In 1983, the U.S. Postal Service introduced an expanded Oshkosh 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 54901, 54902, 54903, 54904, 54906 Zip code plus four additional digits to identify a geographic segment within the five-digit delivery area, such as a Oshkosh 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 Wisconsin.