| | Mineral County | CO | 08079 | | | | | nonmetro county (rural) | recreation | https://maps.google.com/?q=MineralCounty+CO |
| | Moffat County | CO | 08081 | | Steamboat Springs, CO 44460 | | Outlying | nonmetro county (rural) | mining-dependent | https://maps.google.com/?q=MoffatCounty+Colorado |
| | Montezuma County | CO | 08083 | | | | | nonmetro county (rural) | nonspecialized | https://maps.google.com/?q=MontezumaCounty+CO |
| | Montrose County | CO | 08085 | | Montrose, CO 33940 | | Central | nonmetro county (rural) | nonspecialized | https://maps.google.com/?q=MontroseCounty+CO |
| | Morgan County | CO | 08087 | | Fort Morgan, CO 22820 | | Central | nonmetro county (rural) | manufacturing-dependent | https://maps.google.com/?q=MorganCounty+CO |
| | Otero County | CO | 08089 | | | | | nonmetro county (rural) | nonspecialized | https://maps.google.com/?q=OteroCounty+CO |
| | Ouray County | CO | 08091 | | | | | nonmetro county (rural) | recreation | https://maps.google.com/?q=OurayCounty+CO |
| | Park County | CO | 08093 | | Denver-Aurora-Centennial,
CO 19740 | Denver-Aurora-Greeley, CO 216 | Outlying | metro county (urban) | recreation | https://maps.google.com/?q=ParkCounty+CO |
| | Phillips County | CO | 08095 | | | | | nonmetro county (rural) | farm-dependent | https://maps.google.com/?q=PhillipsCounty+CO |
| | Pitkin County | CO | 08097 | | Rifle, CO 40090 | Edwards-Rifle, CO 233 | Outlying | nonmetro county (rural) | recreation | https://maps.google.com/?q=PitkinCounty+CO |