| | Garfield County | CO | 08045 | | Rifle, CO 40090 | Edwards-Rifle, CO 233 | Central | nonmetro county (rural) | mining-dependent | https://maps.google.com/?q=GarfieldCounty+CO |
| | Fremont County | CO | 08043 | | Cañon City, CO 15860 | Pueblo-Cañon City, CO 444 | Central | nonmetro county (rural) | federal/state
government-dependent | https://maps.google.com/?q=FremontCounty+CO |
| | Elbert County | CO | 08039 | | Denver-Aurora-Centennial,
CO 19740 | Denver-Aurora-Greeley, CO 216 | Outlying | metro county (urban) | farm-dependent | https://maps.google.com/?q=ElbertCounty+CO |
| | El Paso County | CO | 08041 | | Colorado Springs, CO 17820 | | Central | metro county (urban) | nonspecialized | https://maps.google.com/?q=ElPasoCounty+CO |
| | Eagle County | CO | 08037 | | Edwards, CO 20780 | Edwards-Rifle, CO 233 | Central | nonmetro county (rural) | recreation | https://maps.google.com/?q=EagleCounty+CO |
| | Douglas County | CO | 08035 | | Denver-Aurora-Centennial,
CO 19740 | Denver-Aurora-Greeley, CO 216 | Central | metro county (urban) | nonspecialized | https://maps.google.com/?q=DouglasCounty+CO |
| | Dolores County | CO | 08033 | | | | | nonmetro county (rural) | farm-dependent | https://maps.google.com/?q=DoloresCounty+CO |
| | Denver County | CO | 08031 | | Denver-Aurora-Centennial,
CO 19740 | Denver-Aurora-Greeley, CO 216 | Central | metro county (urban) | nonspecialized | https://maps.google.com/?q=DenverCounty+CO |
| | Delta County | CO | 08029 | | | | | nonmetro county (rural) | mining-dependent | https://maps.google.com/?q=DeltaCounty+CO |
| | Custer County | CO | 08027 | | | | | nonmetro county (rural) | recreation | https://maps.google.com/?q=CusterCounty+CO |