County San Mateo is located in the state of California. San Mateo is spread between the coordinates of +37.5170962 Latitude and -122.29372847 Longitude. San Mateo has 39 zip codes, 28 cities, 2 area codes and 9 post offices.
Below you will find more info about San Mateo and also zip codes, cities, area codes and the post offices that belong to this county.