There are 22 cities in Lewis and Clark 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 | 2024 Population | 2020 Population | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Helena | 1 | 35,204 | 32,244 | 2.15% | 2,084 | 16.9 | City |
| Helena Valley Southeast | 2 | 9,565 | 8,546 | 1% | 446 | 21.5 | CDP |
| Helena Valley West Central | 3 | 8,260 | 8,042 | 0.33% | 313 | 26.4 | CDP |
| Helena Valley Northwest | 4 | 5,420 | 4,256 | 2.63% | 331 | 16.4 | CDP |
| Helena Valley Northeast | 5 | 4,453 | 3,519 | 2.39% | 84 | 53.2 | CDP |
| Montana City | 6 | 2,716 | 2,821 | 0% | 80 | 34.1 | CDP |
| East Helena | 7 | 2,201 | 1,948 | 2.95% | 543 | 4.1 | City |
| Helena West Side | 8 | 1,583 | 1,656 | -0.25% | 104 | 15.3 | CDP |
| Lincoln | 9 | 1,004 | 1,017 | 0% | 57 | 17.5 | CDP |
| Cascade | 10 | 584 | 596 | -0.51% | 890 | 0.7 | Town |
| Spokane Creek | 11 | 539 | 438 | 2.47% | 31 | 17.3 | CDP |
| Unionville | 12 | 407 | 151 | 7.67% | 318 | 1.3 | CDP |
| York | 13 | 273 | 158 | 7.48% | 832 | 0.3 | CDP |
| Augusta | 14 | 199 | 238 | -3.86% | 216 | 0.9 | CDP |
| Rimini | 15 | 104 | 110 | 8.33% | 342 | 0.3 | CDP |
| Hardy | 16 | 79 | 69 | 6.76% | 70 | 1.1 | CDP |
| Marysville | 17 | 70 | 71 | 7.69% | 141 | 0.5 | CDP |
| Canyon Creek | 18 | 69 | 71 | 7.81% | 94 | 0.7 | CDP |
| Craig | 19 | 46 | 16 | 9.52% | 154 | 0.3 | CDP |
| Gilman | 20 | 29 | 41 | 7.41% | 44 | 0.7 | CDP |
| Cascade Colony | 21 | 27 | 44 | 8% | 32 | 0.9 | CDP |
| Wolf Creek | 22 | 14 | 22 | 7.69% | 65 | 0.2 | CDP |
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.
Helena is the largest city in Lewis and Clark County.
Wolf Creek is the smallest city in Lewis and Clark County.
There are 22 cities in Lewis and Clark County, Montana.