Fallon County, Montana Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates · 42nd-largest in Montana
The population of Fallon County, Montana is 2,817 as of the 2023 American Community Survey, making it the 42nd-largest county in Montana. The median household income is $72,284, the median home value is $237,000, and the median age is 37.2.
The population of Fallon County has grown 2.0% since 2010 (2,889 → 2,946), a +0.14% annualized rate.
2,817
Population
+0.14%
Annual growth
2
People / sq mi
$72,284
Median Income
$237,000
Median Home Value
Fallon County covers 1,621 sq mi of land at 1.7 people per square mile.
About Fallon County, MT
What distinguishes Fallon County is density: among the most sparsely settled of US counties, around 2 people per square mile. With 2,817 residents, Fallon County is a county in Montana. It ranks #42 among counties in Montana by population.
Median household income is $72,284, below the US median of $78,538. The poverty rate is 10.2%, below the national 12.4%. Home values run above average at $237,000, with typical rent around $772.
Degree attainment is on the lower side for US counties: 16.5% of adults hold a bachelor’s degree, below the national 35.0%. Remote work is below the national 14.0% at 6.6%, and the average commute runs about 19 minutes each way.
Fallon County Population History (2010-2024)
The county of Fallon County had a population of 2,889 in 2010 and 2,946 in 2024, a 2.0% growth over 14 years. The peak was 3,172 in 2015. Average annual growth rate: 0.17%.
2,946
Population (2024)
2,889
Population (2010)
3,172
Peak (2015)
0.17%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 2,889 |
| 2011 | 2,930 |
| 2012 | 3,025 |
| 2013 | 3,047 |
| 2014 | 3,111 |
| 2015 | 3,172 |
| 2016 | 3,097 |
| 2017 | 3,012 |
| 2018 | 2,925 |
| 2019 | 2,878 |
| 2020 | 3,029 |
| 2021 | 3,011 |
| 2022 | 3,047 |
| 2023 | 2,999 |
| 2024 | 2,946 |
Race & Ethnicity
| White | 92.8% |
| Black or African American | 0.0% |
| Asian | 2.3% |
| Hispanic or Latino (any race) | 5.9% |
| Two or More Races | 0.0% |
Age & Sex
37.2
Median Age
50.9%
Female
49.1%
Male
20.2%
Age 65+
Age Distribution
Children (under 15): 21.6% · Seniors (65+): 20.2%
Income & Poverty
| Median household income | $72,284+$2,362 vs state |
| Mean household income | $100,253 |
| Per-capita income | $42,214 |
| Poverty rate | 10.2%+3.1% vs state |
| Unemployment rate | 0.0% |
| Employment-to-population | 61.6% |
Top Industries by Employment
The largest employment sector in Fallon County is agriculture, accounting for 31.8% of workers.
How residents commute
0.0%
Drive alone
4.6%
Carpool
79.7%
Public transit
6.6%
Work from home
18.8 min
Avg commute
Housing
$237,000$-101,100 vs state
Median home value
$772
Median rent
69.8%
Homeownership rate
1,451
Total housing units
78.9%
Occupied
21.1%
Vacant
30.2%
Renter-occupied
Social & access
91.6%
With health insurance
96.9%
With broadband internet
35.4%
Foreign-born
2.1%
Veterans (18+)
11.6%
With a disability
98.8%
Speak language other than English at home
Education
97.0%
High School+
16.5%
Bachelor's+
Largest cities in Montana
Other counties in Montana
Part of Montana
Metro areas in Montana
County rankings
Frequently Asked Questions
Fallon County, Montana has a population of 2,817 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 42nd-largest county in Montana. Population density is 2 people per square mile.
The population of Fallon County has grown 2.0% since 2010 (2,889 → 2,946), a +0.14% annualized rate.
The median household income in Fallon County, Montana is $72,284, with mean (average) household income of $100,253 and per-capita income of $42,214. 10.2% of residents live below the federal poverty level.
In Fallon County, the largest racial and ethnic groups are White (92.8%), Hispanic or Latino (5.9%), Asian (2.3%). Figures are from the US Census Bureau's 2023 ACS 5-year estimates and reflect self-reported responses.
The median age in Fallon County, Montana is 37.2 years. Residents are 50.9% female and 49.1% male.
The median home value in Fallon County is $237,000 and median monthly rent is $772. 69.8% of occupied housing units are owner-occupied. The county has 1,451 total housing units, 21.1% of which are vacant.
The largest employment sector in Fallon County, Montana is agriculture, forestry, fishing, and mining, employing 31.8% of workers. The unemployment rate is 0.0%.
Billings is among the largest cities associated with Fallon County, Montana, with a population of 118,321.
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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.