The state of Colorado currently has a total of 642 Zip codes. The first digit of all ZIP codes in Colorado is 8. The first two digits are can be a combination of 80 or 81. The Colorado ZIP code with the largest population is Zip code 80134 in Parker. The wealthiest ZIP code in Colorado based on Adjusted Gross income is 81611 in Aspen.
- Denver ZIP Codes
- Colorado Springs ZIP Codes
- Aurora ZIP Codes
- Fort Collins ZIP Codes
- Lakewood ZIP Codes
- Thornton ZIP Codes
- Arvada ZIP Codes
- Westminster ZIP Codes
- Pueblo ZIP Codes
- Greeley ZIP Codes