City levels are determined by the county in which they are located. If the city is not named below, it may be located within a county listed below. Visit the National Association of Counties website and type the city name into the "City/Zip Search" tab to determine the city's county. If the city is not listed below or is not located in a county below, that city is a Level 1.
| Level | City | County |
|---|---|---|
| 3 | Big Sky / West Yellowstone | Gallatin |
| 4 | Butte | Silver Bow |
| 4 | Glendive / Sidney | Dawson / Richland |
| 4 | Helena | Lewis and Clark |
| 3 | Missoula / Polson / Kalispell | Missoula / Lake / Flathead |