There are 9 cities in Carter County, Montana.
Note: As defined by the US Census Bureau, a city's official boundaries often extend miles beyond the city itself and may even cross county lines. As such, several thousand US cities officially exist in two or more counties (and therefore appear on multiple counties' lists of cities.)
City | Rank | State | 2024 Population | 2020 Census | Annual Change | Density (mi²) | Area (mi²) |
|---|---|---|---|---|---|---|---|
| Spearfish | 1 | South Dakota | 13,606 | 12,222 | 2.61% | 789 | 17.24 |
| Belle Fourche | 2 | South Dakota | 6,066 | 5,630 | 1.83% | 685 | 8.85 |
| Baker | 3 | Montana | 1,825 | 1,791 | 0.5% | 1,615 | 1.13 |
| Ekalaka | 4 | Montana | 395 | 399 | -0.25% | 384 | 1.03 |
| Plevna | 5 | Montana | 167 | 177 | -1.18% | 284 | 0.59 |
| Fruitdale | 6 | South Dakota | 81 | 73 | 2.53% | 296 | 0.27 |
| Camp Crook | 7 | South Dakota | 66 | 60 | 3.13% | 475 | 0.14 |
| Ismay | 8 | Montana | 20 | 20 | 0% | 48 | 0.42 |
| Alzada | 9 | Montana | 3 | 25 | -62.5% | 6 | 0.51 |
Note: City markers shown outside the county boundary mean that a part of the city extends into this county, but is primarily located in an adjacent county.
Spearfish is the largest city in Carter County.
Alzada is the smallest city in Carter County.
There are 9 cities in Carter County, Montana.