Blaine County, Montana Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates · 31st-largest in Montana
The population of Blaine County, Montana is 6,997 as of the 2023 American Community Survey, making it the 31st-largest county in Montana. The median household income is $65,050, the median home value is $124,900, and the median age is 33.9.
The population of Blaine County has grown 6.2% since 2010 (6,503 → 6,903), a +0.43% annualized rate.
6,997
Population
+0.43%
Annual growth
2
People / sq mi
$65,050
Median Income
$124,900
Median Home Value
Blaine County covers 4,228 sq mi of land at 1.7 people per square mile.
About Blaine County, MT
Blaine County is a county in Montana with a population of 6,997. It ranks #31 among counties in Montana by population. The median age is 33.9, younger than the national median. The population is 49.9% male and 50.1% female.
The median household income in Blaine County is $65,050, below the US median of $74,580. 13.9% of residents live below the federal poverty level. Home values sit at a median of $124,900, with monthly rent averaging $689. The homeownership rate of 63.2% is close to the national rate of 64.8%.
Educational attainment in Blaine County reflects 25.8% of adults 25 and older holding a bachelor's degree or higher, below the national average of 34.3%. Roughly 15.5% of workers primarily work from home, similar to the national work-from-home rate of 14.2%. The average commute is 15.9 minutes each way.
Blaine County Population History (2010-2024)
The county of Blaine County had a population of 6,503 in 2010 and 6,903 in 2024, a 6.2% growth over 14 years. The peak was 7,003 in 2020. Average annual growth rate: 0.44%.
6,903
Population (2024)
6,503
Population (2010)
7,003
Peak (2020)
0.44%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 6,503 |
| 2011 | 6,576 |
| 2012 | 6,683 |
| 2013 | 6,638 |
| 2014 | 6,710 |
| 2015 | 6,683 |
| 2016 | 6,716 |
| 2017 | 6,740 |
| 2018 | 6,764 |
| 2019 | 6,704 |
| 2020 | 7,003 |
| 2021 | 6,999 |
| 2022 | 6,956 |
| 2023 | 6,884 |
| 2024 | 6,903 |
Race & Ethnicity
| White | 44.3% |
| Black or African American | 0.4% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 53.4% |
| Two or More Races | 0.0% |
Age & Sex
33.9
Median Age
50.1%
Female
49.9%
Male
16.4%
Age 65+
Age Distribution
Children (under 15): 24.5% · Seniors (65+): 16.4%
Income & Poverty
| Median household income | $65,050$-4,872 vs state |
| Mean household income | $78,155 |
| Per-capita income | $27,817 |
| Poverty rate | 13.9%+6.8% vs state |
| Unemployment rate | 8.7% |
| Employment-to-population | 52.6% |
Top Industries by Employment
The largest employment sector in Blaine County is professional & business services, accounting for 24.8% of workers.
How residents commute
1.3%
Drive alone
7.5%
Carpool
61.0%
Public transit
15.5%
Work from home
15.9 min
Avg commute
Housing
$124,900$-213,200 vs state
Median home value
$689
Median rent
63.2%
Homeownership rate
2,824
Total housing units
81.3%
Occupied
18.7%
Vacant
36.8%
Renter-occupied
Social & access
82.8%
With health insurance
88.6%
With broadband internet
14.3%
Foreign-born
6.0%
Veterans (18+)
19.0%
With a disability
91.4%
Speak language other than English at home
Education
90.6%
High School+
25.8%
Bachelor's+
Largest cities in Montana
Other counties in Montana
Part of Montana
Metro areas in Montana
County rankings
Frequently Asked Questions
Blaine County, Montana has a population of 6,997 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 31st-largest county in Montana. Population density is 2 people per square mile.
The population of Blaine County has grown 6.2% since 2010 (6,503 → 6,903), a +0.43% annualized rate.
The median household income in Blaine County, Montana is $65,050, with mean (average) household income of $78,155 and per-capita income of $27,817. 13.9% of residents live below the federal poverty level.
In Blaine County, the largest racial and ethnic groups are Hispanic or Latino (53.4%), White (44.3%), Black or African American (0.4%). Figures are from the US Census Bureau's 2023 ACS 5-year estimates and reflect self-reported responses.
The median age in Blaine County, Montana is 33.9 years. Residents are 50.1% female and 49.9% male.
The median home value in Blaine County is $124,900 and median monthly rent is $689. 63.2% of occupied housing units are owner-occupied. The county has 2,824 total housing units, 18.7% of which are vacant.
The largest employment sector in Blaine County, Montana is professional, scientific, and management services, employing 24.8% of workers. The unemployment rate is 8.7%.
Billings is among the largest cities associated with Blaine County, Montana, with a population of 118,321.
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Statewide data for Montana
Population, race, income, age, and trends across Montana
Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.