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 Boulder County Address Data
Businesses Addresses: 17,413
PO Box Addresses: 9,296
Residential Addresses: 199,664
Multi-Family Addresses: 40,347
Single Family Addresses: 156,307
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Map of Boulder County, CO ZIP Codes With Actual (Default) City Names