Mill Valley CA ZIP Code
Mill Valley 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 Mill Valley CA zip code by its streets and block numbers if we have some of the Mill Valley streets loaded in our website
Mill Valley Area Code is 415 and Time Zone is Pacific (GMT -08:00).
Mill Valley Zip Code - California
The US ZIP Code basic format consists of five decimal numerical digits assigned to the Mill Valley City. An extended ZIP+4 code, introduced in the 1980s, includes the five digits of the Mill Valley ZIP code, a hyphen, and four more digits that determine a more specific location within a given ZIP code in Mill Valley, California.
The Mill Valley Zip Code is 94941, 94942.
If you want to send a mail to Mill Valley City, you should use the 94941, 94942 Zip Code.
In 1983, the U.S. Postal Service introduced an expanded Mill 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 94941, 94942 Zip code plus four additional digits to identify a geographic segment within the five-digit delivery area, such as a Mill 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 California.