| | Dawson County | MT | 30021 | | | | | nonmetro county (rural) | nonspecialized | https://maps.google.com/?q=DawsonCounty+MT |
| | Deer Lodge County | MT | 30023 | | | | | nonmetro county (rural) | federal/state
government-dependent | https://maps.google.com/?q=DeerLodgeCounty+MT |
| | Fallon County | MT | 30025 | | | | | nonmetro county (rural) | mining-dependent | https://maps.google.com/?q=FallonCounty+MT |
| | Fergus County | MT | 30027 | | | | | nonmetro county (rural) | nonspecialized | https://maps.google.com/?q=FergusCounty+MT |
| | Flathead County | MT | 30029 | | Kalispell, MT 28060 | | Central | nonmetro county (rural) | recreation | https://maps.google.com/?q=FlatheadCounty+MT |
| | Gallatin County | MT | 30031 | | Bozeman, MT 14580 | | Central | nonmetro county (rural) | federal/state
government-dependent | https://maps.google.com/?q=GallatinCounty+MT |
| | Garfield County | MT | 30033 | | | | | nonmetro county (rural) | farm-dependent | https://maps.google.com/?q=GarfieldCounty+MT |
| | Glacier County | MT | 30035 | | | | | nonmetro county (rural) | federal/state
government-dependent | https://maps.google.com/?q=GlacierCounty+MT |
| | Golden Valley County | MT | 30037 | | | | | metro county (urban) | farm-dependent | https://maps.google.com/?q=GoldenValleyCounty+MT |
| | Granite County | MT | 30039 | | | | | nonmetro county (rural) | recreation | https://maps.google.com/?q=GraniteCounty+MT |