Saint Helena CA ZIP Code
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Saint Helena city is located in California State, Napa County and has a unique zip code assigned by the US Postal Service Office.
You can search for the Saint Helena CA zip code by its streets and block numbers if we have some of the Saint Helena streets loaded in our website
Saint Helena Area Code is 707 and Time Zone is Pacific (GMT -08:00).
Saint Helena Zip Code - California
The US ZIP Code basic format consists of five decimal numerical digits assigned to the Saint Helena City. An extended ZIP+4 code, introduced in the 1980s, includes the five digits of the Saint Helena ZIP code, a hyphen, and four more digits that determine a more specific location within a given ZIP code in Saint Helena, California.
The Saint Helena Zip Code is 94574.
If you want to send a mail to Saint Helena City, you should use the 94574 Zip Code.
In 1983, the U.S. Postal Service introduced an expanded Saint Helena 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 94574 Zip code plus four additional digits to identify a geographic segment within the five-digit delivery area, such as a Saint Helena 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 California.