Largest Montana
counties by population
Yellowstone County ranks number 1 in the state with a population of 144,797.
Missoula County ranks number 2 in the state with a population of 108,623.
Gallatin County ranks number 3 in the state with a population of 90,343.
Flathead County ranks number 4 in the state with a population of 89,624.
Cascade County ranks number 5 in the state with a population of 82,178.
Lewis and Clark County ranks number 6 in the state with a population of 61,942.
Ravalli County ranks number 7 in the state with a population of 40,431.
Silver Bow County ranks number 8 in the state with a population of 32,949.
Lake County ranks number 9 in the state with a population of 28,605.
Lincoln County ranks number 10 in the state with a population of 18,717.
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