ZIP Code 94520 is located in the county of Contra Costa in the state of California. 94520 ZIP Code is spread between the coordinates of +37.9751739 Latitude and -122.03990769 Longitude. 94520 ZIP Code is part of the 925 area code. There are 2 postal offices in zip code 94520.
On the below highlighted section you can find the cities which the US Post Office accepts for ZIP code 94520. Always when you mail a package or a letter, be attentive to mention the preferred or acceptable cities. Using any city in the list of unacceptable cities may result in unforseen delays.