ZIP Code 94021 is located in the county of San Mateo in the state of California. 94021 ZIP Code is spread between the coordinates of +37.2750155 Latitude and -122.29312024 Longitude. 94021 ZIP Code is part of the area code. There are 0 postal offices in zip code 94021.
On the below highlighted section you can find the cities which the US Post Office accepts for ZIP code 94021. 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.