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 Jefferson County Address Data
Businesses Addresses: 24,438
PO Box Addresses: 11,119
Residential Addresses: 319,436
Multi-Family Addresses: 71,911
Single Family Addresses: 242,783
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Map of Jefferson County, CO ZIP Codes With Actual (Default) City Names