| population | |
| Beaverhead County | 9371 |
| Big Horn County | 13124 |
| Blaine County | 7044 |
| Broadwater County | 6774 |
| Carbon County | 10473 |
| Carter County | 1415 |
| Cascade County | 84414 |
| Chouteau County | 5895 |
| Custer County | 11867 |
| Daniels County | 1661 |
| Dawson County | 8940 |
| Deer Lodge County | 9298 |
| Fallon County | 3049 |
| Fergus County | 11446 |
| Flathead County | 104357 |
| Gallatin County | 118960 |
| Garfield County | 1173 |
| Glacier County | 13778 |
| Golden Valley County | 884 |
| population | |
| Granite County | 3309 |
| Hill County | 16309 |
| Jefferson County | 12085 |
| Judith Basin County | 2072 |
| Lake County | 31134 |
| Lewis and Clark County | 63395 |
| Liberty County | 1959 |
| Lincoln County | 19677 |
| Madison County | 8623 |
| McCone County | 1729 |
| Meagher County | 1927 |
| Mineral County | 4535 |
| Missoula County | 117922 |
| Musselshell County | 4730 |
| Park County | 17191 |
| Petroleum County | 496 |
| Phillips County | 4217 |
| Pondera County | 5898 |
| Powder River County | 1743 |
| population | |
| Powell County | 6946 |
| Prairie County | 1088 |
| Ravalli County | 44174 |
| Richland County | 11491 |
| Roosevelt County | 10794 |
| Rosebud County | 8329 |
| Sanders County | 12400 |
| Sheridan County | 3539 |
| Silver Bow County | 34200 |
| Stillwater County | 8963 |
| Sweet Grass County | 3651 |
| Teton County | 6226 |
| Toole County | 4971 |
| Treasure County | 762 |
| Valley County | 7578 |
| Wheatland County | 2069 |
| Wibaux County | 937 |
| Yellowstone County | 164731 |
 | Lewistown Municipal Airport | ~ 22.21 km |
| Roundup Airport | ~ 109.11 km |
| Malmstrom Air Force Base | ~ 122.03 km |
| Great Falls International Airport | ~ 133.51 km |
| Mission Field | ~ 154.22 km |
| Billings Logan International Airport | ~ 161.75 km |
| Havre City County Airport | ~ 171.55 km |
| Gallatin Field | ~ 173.34 km |
| Helena Regional Airport | ~ 175.42 km |
