Boulder County Colorado ZIP Codes - Map and Full List

Boulder County Colorado is covered by a total of 29 ZIP Codes. There are 9 ZIP Codes in Boulder County that extend into adjacent counties (Broomfield County, Gilpin County, Jefferson County, Larimer County, and Weld County). Of the ZIP codes within or partially within Boulder County there are 18 Standard ZIP Codes, 3 Unique ZIP Codes and 8 PO Box ZIP Codes.

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Boulder County Colorado ZIP Code Map

Click on the ZIP Codes in the interactive map to view more information. The map control in the upper right corner can be used to toggle map layers on and off. The red outline is the border of Boulder County and can be turned on and off. Each type of postal code can also be turned on and off.

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