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 Contra Costa County Address Data
Businesses Addresses: 36,481
PO Box Addresses: 18,775
Residential Addresses: 451,683
Multi-Family Addresses: 79,093
Single Family Addresses: 370,123
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Map of Contra Costa County, CA ZIP Codes With Actual (Default) City Names