How many people live in ?

Updated annually
In 2025, there were 1.14 million people living in Montana. That makes Montana the 43rd-most populous state, home to 0.33% of people living in the US.

1.14M

population of Montana (2025)

0.33%

Montana share of the US population (2025)
The population of Montana was about 4.7 times higher than it was in 1900. Between 2024 and 2025, the population of Montana grew by about 7,100 people.

About 1.14 million people lived in Montana in 2025. That's about 4.7 times more than in 1900.

Annual population estimates

What are Montana's age demographics?

About 239,400 Montana residents were aged 65 and older in 2024. That represents 21.1% of the state’s population compared with 18% in the US overall.
Another 232,700 Montana residents, or 20.5% of the state’s population, were aged under 18. For comparison, children account for 21.6% of the US population.

A higher share of Montana's population is 65 and older than the US overall.

Population share by age group (2024)

What are Montana's racial and ethnic demographics?

A state’s population may have racial and ethnic differences compared with the US overall. These figures reflect how people identified their race alone (not in combination with other races), and separate Hispanic or Latino ethnicity, following Census Bureau reporting standards.
Non-Hispanic white residents make up 84.9% of Montana’s population, higher than the national share of 57.5%. Montana also has a larger share of people identifying as non-Hispanic American Indian and Alaska Native (5.8%) than the US overall (0.72%).
In contrast, Montana’s non-Hispanic Black or African American population accounted for 0.58%, below the 12.6% share nationwide. The Hispanic population makes up 4.9% of the state, compared with 20% nationally.

A higher share of Montana's population is non-Hispanic white than the US overall.

Population share by race and ethnicity (2024)

What are Montana's most populous counties?

In 2024, five out of 56 counties accounted for over half of Montana’s population:
  • Yellowstone County, 171,600 (15.1% of the population)
  • Gallatin County, 127,000 (11.2%)
  • Missoula County, 122,500 (10.8%)
  • Flathead County, 114,500 (10.1%)
  • Cascade County, 84,500 (7.4%)

In 2024, Yellowstone County was the most populous county in Montana.

Population estimates

What are Montana's most populous cities?

The largest city in Montana is Billings with about 121,500 residents in 2024.

Cities and counties in Montana ranked by population

Cities and counties in Montana ranked by population
1.

Billings 

121,483
2.

Missoula 

78,204
3.

Great Falls

60,013
4.

Bozeman 

57,894
5.

Butte-Silver Bow

35,480
6.

Helena 

34,729
7.

Kalispell 

31,296
8.

Belgrade 

12,741
9.

Anaconda-Deer Lodge County

9,811
10.

Whitefish 

9,256

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Methodology

USAFacts standardizes data, in areas such as time and demographics, to make it easier to understand and compare.

The analysis was generated with the help of AI and reviewed by USAFacts for accuracy.

Page sources

USAFacts endeavors to share the most up-to-date information available. We sourced the data on this page directly from government agencies; however, the intervals at which agencies publish updated data vary.