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.
Fallon County, MT Climate
Fallon County, MT has an average annual temperature of 7.6°C (46°F) and receives about 384 mm of precipitation per year. The warmest month is July and the coldest is January. Figures are 1970–2000 climate normals.
7.6°C
Avg Temp
384
Precip (mm/yr)
Jul
Hottest Month
Jan
Coldest Month
| Month | Avg (°C/°F) | Precip |
|---|---|---|
| January | -8° / 17° | 13 mm |
| February | -4° / 25° | 10 mm |
| March | 1° / 34° | 17 mm |
| April | 8° / 46° | 38 mm |
| May | 14° / 56° | 60 mm |
| June | 19° / 66° | 74 mm |
| July | 23° / 73° | 47 mm |
| August | 22° / 71° | 33 mm |
| September | 15° / 59° | 36 mm |
| October | 9° / 47° | 29 mm |
| November | 0° / 32° | 15 mm |
| December | -6° / 21° | 12 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 Fallon County, MT
The most comfortable months to visit Fallon County, MT are typically August, July and June, when temperatures are mildest and rainfall is relatively low. The hottest month is July (around 32°C high). The coldest is January (near -15°C low). June is usually the wettest month.
Where to stay near Fallon County
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Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.