| | La Plata County | CO | 08067 | | Durango, CO 20420 | | Central | nonmetro county (rural) | recreation | https://maps.google.com/?q=LaPlataCounty+CO |
| | Kit Carson County | CO | 08063 | | | | | nonmetro county (rural) | farm-dependent | https://maps.google.com/?q=KitCarsonCounty+CO |
| | Kiowa County | CO | 08061 | | | | | nonmetro county (rural) | farm-dependent | https://maps.google.com/?q=KiowaCounty+CO |
| | Jefferson County | CO | 08059 | | Denver-Aurora-Centennial,
CO 19740 | Denver-Aurora-Greeley, CO 216 | Central | metro county (urban) | nonspecialized | https://maps.google.com/?q=JeffersonCounty+CO |
| | Jackson County | CO | 08057 | | | | | nonmetro county (rural) | farm-dependent | https://maps.google.com/?q=JacksonCounty+CO |
| | Huerfano County | CO | 08055 | | | | | nonmetro county (rural) | recreation | https://maps.google.com/?q=HuerfanoCounty+CO |
| | Hinsdale County | CO | 08053 | | | | | nonmetro county (rural) | recreation | https://maps.google.com/?q=HinsdaleCounty+CO |
| | Gunnison County | CO | 08051 | | | | | nonmetro county (rural) | mining-dependent | https://maps.google.com/?q=GunnisonCounty+CO |
| | Grand County | CO | 08049 | | | | | nonmetro county (rural) | recreation | https://maps.google.com/?q=GrandCounty+CO |
| | Gilpin County | CO | 08047 | | Denver-Aurora-Centennial,
CO 19740 | Denver-Aurora-Greeley, CO 216 | Outlying | metro county (urban) | recreation | https://maps.google.com/?q=GilpinCounty+CO |