Note: Every ZIP Code has a single ACTUAL City Name assigned by the US Postal Service (USPS).
See the specific ZIP Code for acceptable Alternate City Names and spelling variations.
ZIP Codes in San Mateo County Address Data
Businesses Addresses: 28,362
PO Box Addresses: 17,054
Residential Addresses: 283,871
Multi-Family Addresses: 82,377
Single Family Addresses: 197,448
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Map of San Mateo County, CA ZIP Codes With Actual (Default) City Names
