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 stands apart on settlement density — it is among the most sparsely settled of US counties, at roughly 2 people per square mile. Blaine County is a county in Montana with a population of 6,997. It ranks #31 among counties in Montana by population.
Median household income is $65,050, below the US median of $78,538. Poverty sits at 13.9%, above the national 12.4%. Homes are comparatively cheap — a median value of $124,900, with typical rent around $689.
Degree attainment is mid-range for US counties: 25.8% of adults hold a four-year degree, below the national 35.0%. Working from home is common here: 15.5% of workers do so, above the national 14.0%, and the average commute runs about 16 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.
Blaine County, MT Climate
Blaine County, MT has an average annual temperature of 6.3°C (43°F) and receives about 331 mm of precipitation per year. The warmest month is July and the coldest is January. Figures are 1970–2000 climate normals.
6.3°C
Avg Temp
331
Precip (mm/yr)
Jul
Hottest Month
Jan
Coldest Month
| Month | Avg (°C/°F) | Precip |
|---|---|---|
| January | -9° / 16° | 15 mm |
| February | -5° / 23° | 10 mm |
| March | 0° / 32° | 14 mm |
| April | 7° / 44° | 27 mm |
| May | 12° / 54° | 55 mm |
| June | 17° / 63° | 56 mm |
| July | 20° / 68° | 44 mm |
| August | 20° / 68° | 32 mm |
| September | 14° / 57° | 36 mm |
| October | 8° / 46° | 17 mm |
| November | -1° / 30° | 12 mm |
| December | -7° / 19° | 13 mm |
1970–2000 normals from WorldClim 2.1 (~9 km grid). Precipitation can be less precise near mountains or coastlines, where rainfall varies sharply over short distances.
Best time to visit Blaine County, MT
The most comfortable months to visit Blaine County, MT are typically August, July and June, when temperatures are mildest and rainfall is relatively low. The hottest month is July (around 29°C high). The coldest is January (near -15°C low). June is usually the wettest month.
Where to stay near Blaine County
Visiting or relocating to Blaine County, MT? Compare hotels and short-term rentals across the county — live availability and prices.
Top-rated places to stay near Blaine County
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.
Planning a move to Blaine County?
Get relocation and cost-of-living insights for Blaine County, MT by email. No spam, unsubscribe anytime.
More from Montana
Population 167,340
Population 122,194
Population 119,639
Population 108,445
Full rankings of Montana counties
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.