Montana Citizen Population By County in 2010 (ACS-5Yrs)

Updated on March 28, 2026.

Based on the US Census Bureau's special tabulation from the ACS 5-year estimates, in 2010, the citizen population for Montana was 964,985 and represented 99.10% of the total Montana population.

Among all Montana counties, Yellowstone had the highest citizen population (143.12K), followed by Missoula (105.99K), and Flathead (88.28K).

In terms of percentages, Garfield had the highest percentage of its population being citizens (100.00%), followed by Golden Valley (100.00%), and Mineral (100.00%).

The chart and table below shows the citizen population of each county and the percentage of each county's population that were citizens.

You can see similar information for other states and by state for the United States.

You may also be interested in:
Montana Citizen Voting-age Population By County in 2010

Data Source: US Census - ACS 5-Year (CVAP).

See this for other years:

Montana Citizen Population By County in 2010

Items per page:

0 of 0

County	Citizen Population	% of County Population
Yellowstone	143120	99.35
Missoula	105990	98.79
Flathead	88280	98.95
Gallatin	86220	98.34
Cascade	79985	99.29
Lewis and Clark	61085	99.09
Ravalli	39725	99.28
Silver Bow	33530	99.22
Lake	28160	98.82
Lincoln	19325	99.08
Hill	15890	99.28
Park	15540	98.67
Glacier	13215	99.74
Big Horn	12650	99.88
Custer	11465	99.26
Fergus	11420	99.18
Sanders	11265	99.12
Jefferson	11120	99.60
Roosevelt	10235	99.61
Carbon	9890	98.95
Richland	9375	98.68
Deer Lodge	9255	99.84
Rosebud	9115	99.78
Beaverhead	8955	98.08
Dawson	8920	99.83
Stillwater	8880	99.38
Madison	7430	97.89
Valley	7250	98.71
Powell	7045	99.58
Blaine	6465	99.92
Pondera	6135	99.84
Teton	6075	99.51
Chouteau	5730	99.39
Broadwater	5280	99.91
Toole	5065	98.45
Musselshell	4305	99.19
Mineral	4195	100.00
Phillips	4180	99.41
Sweet Grass	3680	99.06
Sheridan	3455	98.57
Granite	3035	99.67
Fallon	2785	98.93
Liberty	2255	99.78
Wheatland	2120	100.00
Meagher	2020	99.75
Judith Basin	1955	99.49
McCone	1710	99.71
Powder River	1655	99.70
Daniels	1645	99.70
Carter	1285	99.61
Garfield	1225	100.00
Prairie	1090	100.00
Wibaux	1060	99.53
Treasure	840	98.82
Golden Valley	810	100.00
Petroleum	600	100.00