Cities in Jefferson County, Montana by Population (2024)

There are 21 cities in Jefferson 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)
Butte-Silver Bow (balance)1Montana36,26534,5671.19%51715.76
Anaconda-Deer Lodge County2Montana9,6009,4200.47%13736.68
Helena Valley Southeast3Montana9,4908,5460.61%44221.47
Montana City4Montana2,6782,821-0.7%7934.10
East Helena5Montana2,0501,9481.29%5064.05
Clancy6Montana1,9761,9640.15%5039.17
Three Forks7Montana1,9131,981-0.88%1,3291.44
Wheatland8Montana1,39863615.82%1974.45
Boulder9Montana1,3281,2062.39%1,1811.12
Ponderosa Pines10Montana1,26242020.08%3239.65
Whitehall11Montana1,1181,0082.57%1,5860.70
South Hills12Montana6725863.38%1145.87
Walkerville13Montana6706341.36%3012.23
Spokane Creek14Montana5884386.91%3417.29
Jefferson City15Montana5645968.05%2423.22
Rader Creek16Montana50729511.67%2520.25
Basin17Montana360267-0.55%2812.71
Willow Creek18Montana206216-0.96%752.73
Elkhorn19Montana98034.25%156.74
Cardwell20Montana7410721.31%342.15
Mammoth21Montana36033.33%1030.35

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 Jefferson County, Montana?

Butte-Silver Bow (balance) is the largest city in Jefferson County.

What is the smallest city in Jefferson County, Montana?

Mammoth is the smallest city in Jefferson County.

How many cities are in Jefferson County?

There are 21 cities in Jefferson County, Montana.

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