Rock Valley IA ZIP Code
Rock Valley city is located in Iowa State, Sioux County and has a unique zip code assigned by the US Postal Service Office.
You can search for the Rock Valley IA zip code by its streets and block numbers if we have some of the Rock Valley streets loaded in our website
Rock Valley Area Code is 712 and Time Zone is Central (GMT -06:00).
Rock Valley Zip Code - Iowa
The US ZIP Code basic format consists of five decimal numerical digits assigned to the Rock Valley City. An extended ZIP+4 code, introduced in the 1980s, includes the five digits of the Rock Valley ZIP code, a hyphen, and four more digits that determine a more specific location within a given ZIP code in Rock Valley, Iowa.
The Rock Valley Zip Code is 51247.
If you want to send a mail to Rock Valley City, you should use the 51247 Zip Code.
In 1983, the U.S. Postal Service introduced an expanded Rock Valley 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 51247 Zip code plus four additional digits to identify a geographic segment within the five-digit delivery area, such as a Rock Valley 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.