Demographics of Fallon County, Montana

Fallon County, Montana had 2,959 people on July 1, 2025, by the Census Bureau’s estimate: −70 since July 2020. Age, income, poverty, housing and origin below come from the American Community Survey, averaged over 2020–2024, each with its margin of error.

Fallon County, in four figures

2,959
Population: July 1, 2025, Vintage 2025 estimate.; −2.3%
Change since July 2020: −70 people.; 37.5 ±1.8
Median age: ACS 2020–⁠2024.; $76,250 ±$13,756
Median household income: ACS 2020–⁠2024, in 2024 dollars.

Population, year by year

July 1 estimates from the Census Bureau’s Vintage 2025. Each year's change is births less deaths, net moves from abroad and net moves from elsewhere in the country, with the Bureau's small residual. The 2020 row's components run 3 months, from the April census to July 1.

Fallon County, Montana's population shrank 2.3% from July 2020 to July 2025, against +3.1% nationally

The July 1 estimate of Fallon County, Montana's resident population and the nation's, each year of the Census Bureau's Vintage 2025, as a share of its July 2020 level (= 100).

U.S. Census Bureau — Census Bureau population estimates — counties and Puerto Rico municipios, with components of change

About this chart

The figures

Fallon County, Montana's population shrank 2.3% from July 2020 to July 2025, against +3.1% nationally. The July 1 estimate of Fallon County, Montana's resident population and the nation's, each year of the Census Bureau's Vintage 2025, as a share of its July 2020 level (= 100).
July 1	Population	Index	United States
2020	3,029	100.0	100.0
2021	3,012	99.4	100.2
2022	3,047	100.6	100.7
2023	3,000	99.0	101.6
2024	2,960	97.7	102.5
2025	2,959	97.7	103.1

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Population of Fallon County, Montana on July 1 of each year, Vintage 2025
July 1	Population	Change	Births less deaths	From abroad	From elsewhere in the country
2020	3,029	−20	−7	0	−11
2021	3,012	−17	+9	+3	−30
2022	3,047	+35	−3	−1	+41
2023	3,000	−47	+11	−1	−56
2024	2,960	−40	+17	−2	−55
2025	2,959	−1	+16	−2	−15

Age, 2020–2024

The median age is 37.5 ±1.8: for men 35.3 ±4.2 and for women 42.2 ±5.6. Shares are of everyone the survey counts, in the Bureau’s sex-by-age table (B01001).

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People in Fallon County by age, ACS 2020–2024
Age	People	Share	Montana	United States
Under 5	190 ±33	6.9% ±1.1	5.2% ±<0.1	5.6% ±<0.1
5 to 17	463 ±90	16.8% ±3.1	15.8% ±0.2	16.3% ±<0.1
18 to 24	247 ±98	8.9% ±3.5	9.0% ±0.2	9.1% ±<0.1
25 to 44	674 ±107	24.4% ±3.5	25.8% ±0.2	26.9% ±<0.1
45 to 64	572 ±95	20.7% ±3.2	24.1% ±0.2	24.8% ±<0.1
65 and over	614 ±113	22.2% ±3.8	20.1% ±0.2	17.2% ±<0.1

Income and poverty, 2020–2024

Median household income is $76,250 ±$13,756, and income per person $47,348 ±$8,357, in 2024 dollars. The median is $72,509 ±$761 in Montana and $80,734 ±$166 in the United States.

Households by income

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Households in Fallon County by income, ACS 2020–2024
Household income	Households	Share	Montana	United States
Under $25,000	228 ±95	19.4% ±7.9	15.0% ±0.4	14.6% ±<0.1
$25,000 to $49,999	130 ±63	11.0% ±5.2	19.4% ±0.5	16.7% ±<0.1
$50,000 to $74,999	226 ±107	19.2% ±8.9	17.3% ±0.4	15.5% ±<0.1
$75,000 to $99,999	149 ±63	12.6% ±5.2	13.6% ±0.4	12.6% ±<0.1
$100,000 to $149,999	201 ±79	17.1% ±6.6	17.4% ±0.4	17.5% ±<0.1
$150,000 to $199,999	48 to 154	4.1% to 13.0%	8.2% ±0.3	9.6% ±<0.1
$200,000 or more	143 ±65	12.1% ±5.4	9.0% ±0.3	13.4% ±0.1

A range (the estimate less and plus its margin) where the Bureau's estimate is too uncertain to state as one number: a coefficient of variation over 30%.

Poverty by age

The poverty rate is the share of people whose family income is below the federal threshold for their family’s size, of everyone for whom the Bureau determines it (B17020).

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Poverty rate in Fallon County by age, ACS 2020–2024
Age	Below poverty	Rate	Montana	United States
All ages	309 ±136	11.4% ±5.0	11.5% ±0.3	12.5% ±0.1
Under 18	0 to 66	0% to 10.1%	12.7% ±0.6	16.1% ±0.1
18 to 59	157 ±72	12.3% ±5.4	11.7% ±0.4	11.6% ±0.1
60 and over	53 to 197	7.2% to 25.0%	10.3% ±0.4	11.0% ±<0.1

A range (the estimate less and plus its margin) where the Bureau's estimate is too uncertain to state as one number: a coefficient of variation over 30%.

Housing, 2020–2024

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Housing in Fallon County, ACS 2020–2024
Measure	Fallon County	Montana	United States
Housing units	1,483 ±86	528,419 ±3,257	143,775,355 ±10,234
Occupied	79.4% ±4.5	86.8% ±0.5	89.9% ±0.1
Vacant	20.6% ±6.2	13.2% ±0.3	10.1% ±0.1
Owner occupied	69.4% ±7.2	69.2% ±0.6	65.2% ±0.3
Renter occupied	30.6% ±8.7	30.8% ±0.4	34.8% ±0.1
Median home value	$244,800 ±$28,041	$375,800 ±$3,433	$332,700 ±$236
Median gross rent	$779 ±$54	$1,081 ±$14	$1,413 ±$2
Median year built	1982 ±5	1981 ±1	1980 ±1

Occupied and vacant are shares of all housing units; owner and renter occupied are shares of occupied units. Value and rent are medians in 2024 dollars.

Origin and place of birth, 2020–2024

Hispanic or Latino origin is not a race in the Census Bureau’s tables. Here the people of Hispanic origin, of any race, are one row, and everyone else is counted by race alone (B03002), so the rows add to the whole.

Hispanic origin and race

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People in Fallon County by Hispanic origin and race, ACS 2020–2024
Origin	People	Share	Montana	United States
Hispanic or Latino	0 to 15	0% to 0.5%	4.6% ±<0.1	19.3% ±<0.1
White alone, not Hispanic	2,544 ±183	92.2% ±2.6	83.6% ±0.2	57.4% ±<0.1
Black alone, not Hispanic	0 to 11	0% to 0.4%	0.4% ±<0.1	11.9% ±<0.1
Asian alone, not Hispanic	0 to 11	0% to 0.4%	0.8% ±0.1	5.9% ±<0.1
American Indian and Alaska Native alone, not Hispanic	26 to 98	1.0% to 3.5%	5.3% ±0.1	0.5% ±<0.1
Native Hawaiian and Other Pacific Islander alone, not Hispanic	0 to 11	0% to 0.4%	< 0.1% ±<0.1	0.2% ±<0.1
Some other race alone, not Hispanic	0 to 11	0% to 0.4%	0.5% ±0.1	0.6% ±<0.1
Two or more races, not Hispanic	150 ±43	5.4% ±1.5	4.7% ±0.2	4.3% ±<0.1

A range (the estimate less and plus its margin) where the Bureau's estimate is too uncertain to state as one number: a coefficient of variation over 30%.

Place of birth and citizenship

“Born a citizen outside the states” counts people born in Puerto Rico, the island areas, or abroad to American parents. Naturalized citizens and those who are not citizens together make up the people born abroad (B05002).

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People in Fallon County by place of birth and citizenship, ACS 2020–2024
Born	People	Share	Montana	United States
Born in the state	1,848 ±191	67.0% ±5.3	52.1% ±0.5	57.3% ±<0.1
Born in another state	852 ±152	30.9% ±5.1	44.8% ±0.4	26.9% ±<0.1
Born a citizen outside the states	0 to 18	0% to 0.7%	0.8% ±0.1	1.7% ±<0.1
Born abroad	16 to 88	0.6% to 3.2%	2.3% ±0.1	14.1% ±<0.1
Naturalized citizens	16 to 88	0.6% to 3.2%	1.2% ±0.1	7.4% ±<0.1
Not citizens	0 to 11	0% to 0.4%	1.1% ±0.1	6.8% ±<0.1

A range (the estimate less and plus its margin) where the Bureau's estimate is too uncertain to state as one number: a coefficient of variation over 30%.

Fallon County among the counties of Montana

42nd of 56 by population, July 2025. Every one is listed on the Montana page.

Counties of Montana near Fallon County in population, July 2025
County	July 2025	Change since 2020
Mineral County	5,185	+13.5%
Phillips County	4,203	−0.1%
Sweet Grass County	3,762	+2.4%
Granite County	3,658	+10.6%
Sheridan County	3,436	−2.9%
Fallon County	2,959	−2.3%
Judith Basin County	2,162	+6.8%
Meagher County	2,137	+11.2%
Wheatland County	2,100	+1.2%
Liberty County	1,957	+0.1%
Powder River County	1,781	+5.1%

Elsewhere on the site

Sources

Census Bureau population estimates — counties and Puerto Rico municipios, with components of change — U.S. Census Bureau · U.S. Government work · retrieved September 25, 2026
American Community Survey 5-year estimates — table-based Summary File · U.S. Government work

Data retrieved September 25, 2026