Cities in Lewis and Clark County, Montana by Population (2024)

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.)

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City
Rank
State
2024 Population
2020 Census
Annual Change
Density (mi²)
Area (mi²)
Helena1Montana35,54032,2302.38%2,10416.89
Helena Valley Southeast2Montana9,4908,5460.61%44221.47
Helena Valley West Central3Montana8,3708,0420.99%31726.39
Helena Valley Northwest4Montana6,0304,2567.95%36816.38
Helena Valley Northeast5Montana4,9713,5197.88%9353.24
Montana City6Montana2,6782,821-0.7%7934.10
East Helena7Montana2,0501,9481.29%5064.05
Helena West Side8Montana1,5261,656-2.05%10015.28
Lincoln9Montana9931,017-0.6%5717.55
Cascade10Montana590598-0.34%8990.66
Spokane Creek11Montana5884386.91%3417.29
Unionville12Montana54715122.1%4271.28
York13Montana2481582.9%7560.33
Augusta14Montana192238-5.42%2080.92
Rimini15Montana1031107.29%3390.30
Canyon Creek16Montana67716.35%920.73
Hardy17Montana67690%591.13
Marysville18Montana4971-9.26%980.50
Craig19Montana41162.5%1370.30
Gilman20Montana27413.85%410.65
Cascade Colony21Montana244-83.33%20.85
Wolf Creek22Montana222-71.43%90.21

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.

What is the largest city in Lewis and Clark County, Montana?

Helena is the largest city in Lewis and Clark County.

What is the smallest city in Lewis and Clark County, Montana?

Wolf Creek is the smallest city in Lewis and Clark County.

How many cities are in Lewis and Clark County?

There are 22 cities in Lewis and Clark County, Montana.

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