San Quentin CA ZIP Code
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San Quentin city is located in California State, Marin County and has a unique zip code assigned by the US Postal Service Office.
You can search for the San Quentin CA zip code by its streets and block numbers if we have some of the San Quentin streets loaded in our website
San Quentin Area Code is 415 and Time Zone is Pacific (GMT -08:00).
San Quentin Zip Code - California
The US ZIP Code basic format consists of five decimal numerical digits assigned to the San Quentin City. An extended ZIP+4 code, introduced in the 1980s, includes the five digits of the San Quentin ZIP code, a hyphen, and four more digits that determine a more specific location within a given ZIP code in San Quentin, California.
The San Quentin Zip Code is 94964, 94974.
If you want to send a mail to San Quentin City, you should use the 94964, 94974 Zip Code.
In 1983, the U.S. Postal Service introduced an expanded San Quentin 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 94964, 94974 Zip code plus four additional digits to identify a geographic segment within the five-digit delivery area, such as a San Quentin 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.