Jefferson County, Colorado ZIP Codes

27 ZIP Codes

Zip Code
City
Population
80123Littleton44,549
80401Golden43,811
80127Littleton43,494
80128Littleton36,712
80021Broomfield36,555
80003Arvada35,976
80228Denver34,942
80227Denver34,907
80004Arvada33,700
80226Denver31,573
80005Arvada28,459
80214Denver27,022
80033Wheat Ridge26,485
80232Denver23,050
80002Arvada21,270
80403Golden20,732
80215Denver19,839
80007Arvada19,078
80465Morrison16,582
80235Denver8,373
80433Conifer8,292
80470Pine3,608
80454Indian Hills986
80453Idledale297
80457Kittredge283
80425Buffalo Creek243
80419Golden0

Overview of ZIP Codes in Jefferson County

ZCTAs are geographic areas created by the US Census Bureau to approximate the delivery areas of ZIP Codes for statistical analysis. While ZCTAs use the same five-digit codes as ZIP Codes, they represent defined geographic areas that may not exactly match the mail delivery routes of ZIP Codes.
27
ZIP Codes

The data shown reflect ZCTAs from the US Census. As of 2025, there are 27 ZCTAs in Jefferson County, Colorado (US Census).