Flathead County, Montana Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates · 4th-largest in Montana
The population of Flathead County, Montana is 108,445 as of the 2023 American Community Survey, making it the 4th-largest county in Montana. The median household income is $71,327, the median home value is $467,700, and the median age is 42.1.
The population of Flathead County has grown 26.0% since 2010 (90,863 → 114,527), a +1.67% annualized rate.
108,445
Population
+1.67%
Annual growth
21
People / sq mi
$71,327
Median Income
$467,700
Median Home Value
Flathead County covers 5,087 sq mi of land at 21.3 people per square mile.
About Flathead County, MT
Housing cost is the defining feature of Flathead County: the median home is valued at $467,700. With 108,445 residents, Flathead County is a county in Montana. That makes it one of the ten largest counties in Montana in the country, at #4 by population.
Median household income is $71,327, below the US median of $78,538. The poverty rate, 5.6%, is on the lower side for US counties and below the national 12.4%. Home prices are steep, with the typical property valued at $467,700, with typical rent around $1,094.
College attainment is above the local norm at 36.0%, near the national 35.0%. Remote work is widespread — 14.7% of workers stay home, close to the national 14.0%, and the average commute runs about 19 minutes each way.
High housing values reframe the income picture in Flathead County — even solid earnings stretch less against home prices and rents at this level.
Flathead County Population History (2010-2024)
The county of Flathead County had a population of 90,863 in 2010 and 114,527 in 2024, a 26.0% growth over 14 years. The peak was 114,527 in 2024. Average annual growth rate: 1.67%.
114,527
Population (2024)
90,863
Population (2010)
114,527
Peak (2024)
1.67%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 90,863 |
| 2011 | 91,282 |
| 2012 | 91,630 |
| 2013 | 92,988 |
| 2014 | 94,642 |
| 2015 | 95,940 |
| 2016 | 97,901 |
| 2017 | 100,272 |
| 2018 | 102,100 |
| 2019 | 103,880 |
| 2020 | 104,881 |
| 2021 | 108,790 |
| 2022 | 111,783 |
| 2023 | 113,495 |
| 2024 | 114,527 |
Race & Ethnicity
| White | 91.4% |
| Black or African American | 0.3% |
| Asian | 0.1% |
| Hispanic or Latino (any race) | 2.9% |
| Two or More Races | 0.0% |
Age & Sex
42.1
Median Age
50.0%
Female
50.0%
Male
20.8%
Age 65+
Age Distribution
Children (under 15): 18.0% · Seniors (65+): 20.8%
Income & Poverty
| Median household income | $71,327+$1,405 vs state |
| Mean household income | $94,808 |
| Per-capita income | $39,403 |
| Poverty rate | 5.6%-1.5% vs state |
| Unemployment rate | 1.9% |
| Employment-to-population | 60.7% |
Top Industries by Employment
The largest employment sector in Flathead County is professional & business services, accounting for 21.2% of workers.
How residents commute
0.1%
Drive alone
2.9%
Carpool
73.8%
Public transit
14.7%
Work from home
19.3 min
Avg commute
Housing
$467,700+$129,600 vs state
Median home value
$1,094
Median rent
74.0%
Homeownership rate
50,948
Total housing units
85.5%
Occupied
14.5%
Vacant
26.0%
Renter-occupied
Social & access
90.9%
With health insurance
94.4%
With broadband internet
50.1%
Foreign-born
9.4%
Veterans (18+)
11.5%
With a disability
96.7%
Speak language other than English at home
Education
95.6%
High School+
36.0%
Bachelor's+
Largest cities in Montana
Other counties in Montana
Part of Montana
Metro areas in Montana
County rankings
Frequently Asked Questions
Flathead County, Montana has a population of 108,445 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 4th-largest county in Montana. Population density is 21 people per square mile.
The population of Flathead County has grown 26.0% since 2010 (90,863 → 114,527), a +1.67% annualized rate.
The median household income in Flathead County, Montana is $71,327, with mean (average) household income of $94,808 and per-capita income of $39,403. 5.6% of residents live below the federal poverty level.
In Flathead County, the largest racial and ethnic groups are White (91.4%), Hispanic or Latino (2.9%), Black or African American (0.3%). Figures are from the US Census Bureau's 2023 ACS 5-year estimates and reflect self-reported responses.
The median age in Flathead County, Montana is 42.1 years. Residents are 50.0% female and 50.0% male.
The median home value in Flathead County is $467,700 and median monthly rent is $1,094. 74.0% of occupied housing units are owner-occupied. The county has 50,948 total housing units, 14.5% of which are vacant.
The largest employment sector in Flathead County, Montana is professional, scientific, and management services, employing 21.2% of workers. The unemployment rate is 1.9%.
Billings is among the largest cities associated with Flathead 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.