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Population and Demography of Montana
Montana is a state in the Mountain West sub-region of the Western United States. It is bordered by Idaho to the west; North Dakota and South Dakota to the east; Wyoming to the south; and by the Canadian provinces of Alberta, British Columbia, and Saskatchewan to the north.
Montana is the seventh-least populous state of the United States and Its fourth-largest U.S. state by area. The total Land area is 145,552 square miles (376,980 square kilometers) and an average of 7 people for every square mile. This makes Montana the 3rd Least densely populated state in the US.
As per the United States Census Bureau, the population of Montana in 2020 was 1,084,225 (1 million)
Estimated Population of Montana in 2024 – 1,132,812 or 1.1 million
Montana Population (2010-2020)
Montana has a population growth rate of 9.6% during 2010-2020. It has population increase of 94,810 since 2010. The median age in Montana is approximately 39.8 years of age. The ratio of females to males is approximately 49.7% females to 50.3% males.
| Montana | Census 2020 |
| Total Population | 1,084,225 (1 million) |
| Percentage Change | 9.6% |
| Population Rank | 44th |
| Total Land Area | 145,552 sq mi (376,980 km2) |
| Area Rank | 4th |
| Population Density | 7.09/sq mi (2.73/km2) |
| Capital City | Helena |
| Largest City | Billings |
Montana Historical Population
Montana has a population growth rate of 6.1%. during 2010-2020. In 1910 the Population of Montana was just 200 thousand and in the year 2000, it reached 1 million, an increase of almost 0.8 million.
Let’s look at decade population and percentage change
| Census Year | Population | % Change |
| 1870 | 20,595 | – |
| 1880 | 39,159 | 90.10% |
| 1890 | 142,924 | 265.00% |
| 1900 | 243,329 | 70.30% |
| 1910 | 376,053 | 54.50% |
| 1920 | 548,889 | 46.00% |
| 1930 | 537,606 | −2.1% |
| 1940 | 559,456 | 4.10% |
| 1950 | 591,024 | 5.60% |
| 1960 | 674,767 | 14.20% |
| 1970 | 694,409 | 2.90% |
| 1980 | 786,690 | 13.30% |
| 1990 | 799,065 | 1.60% |
| 2000 | 902,195 | 12.90% |
| 2010 | 989,415 | 9.70% |
| 2020 | 1,084,225 | 9.60% |
Religion and affiliations
Christianity is the majority religion in Montana followed by 65% of the population. The largest Christian denomination in Montana is Protestant (42%); Roman Catholics (17%); Mormonism (4%); Eastern Orthodoxy (1%); Jehovah’s Witnesses (1%).
Next comes the Unaffiliated population, 30% of the population doesn’t follow or adhere to any faith or religion. Other non-Christian-based religions are followed by 5% of the population and include Jewish, Hinduism, Buddhism, Muslim, and other smaller faiths.
For more details read Religion in Connecticut
Race and Ethnicity
In 2020, the White alone (non-Hispanic) population was the largest racial or ethnic group in Montana, comprising 83.13% of the total population. It was followed by the American Indian population whose share was 5.96%. Two or more races population was the third largest group at 5.05%. Hispanic or Latino is at 4.17%
Ancestry in Montana
As per Census Studies & estimate German, Irish, English, Norwegian and American have made the five largest ancestry groups in Montana.
For more Details read Race and Ethnicity in Montana
Top cities and counties in Montana
As of 2022, Montana is divided into 56 counties. The most populated counties in Montana are Yellowstone (158,980) and Missoula (117,441) counties. The largest county by area is Beaverhead County (5,543 sq mi)
The most populated city in Montana is Billings with 117,116 residents. It’s followed by Missoula (73,489) and Great Falls (60,442).
read more about Cities and counties in Montana
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