Demographics of Fergus County, Montana

Fergus County, Montana had 11,825 people on July 1, 2025, by the Census Bureau’s estimate: +352 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.

Fergus County, in four figures

11,825
Population: July 1, 2025, Vintage 2025 estimate.; +3.1%
Change since July 2020: +352 people.; 44.4 ±0.8
Median age: ACS 2020–⁠2024.; $63,706 ±$4,994
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.

Fergus County, Montana's population grew 3.1% from July 2020 to July 2025, against +3.1% nationally

The July 1 estimate of Fergus 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

Fergus County, Montana's population grew 3.1% from July 2020 to July 2025, against +3.1% nationally. The July 1 estimate of Fergus 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	11,473	100.0	100.0
2021	11,618	101.3	100.2
2022	11,662	101.6	100.7
2023	11,813	103.0	101.6
2024	11,826	103.1	102.5
2025	11,825	103.1	103.1

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Population of Fergus 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	11,473	+26	−2	+1	+29
2021	11,618	+145	−61	+2	+210
2022	11,662	+44	−72	+1	+114
2023	11,813	+151	−12	+12	+152
2024	11,826	+13	−18	+9	+24
2025	11,825	−1	−11	+7	+5

Age, 2020–2024

The median age is 44.4 ±0.8: for men 43.9 ±1.0 and for women 45.1 ±1.7. Shares are of everyone the survey counts, in the Bureau’s sex-by-age table (B01001).

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People in Fergus County by age, ACS 2020–2024
Age	People	Share	Montana	United States
Under 5	646 ±57	5.5% ±0.5	5.2% ±<0.1	5.6% ±<0.1
5 to 17	1,810 ±143	15.5% ±1.2	15.8% ±0.2	16.3% ±<0.1
18 to 24	745 ±167	6.4% ±1.4	9.0% ±0.2	9.1% ±<0.1
25 to 44	2,702 ±197	23.1% ±1.7	25.8% ±0.2	26.9% ±<0.1
45 to 64	2,853 ±235	24.4% ±2.0	24.1% ±0.2	24.8% ±<0.1
65 and over	2,931 ±231	25.1% ±2.0	20.1% ±0.2	17.2% ±<0.1

Income and poverty, 2020–2024

Median household income is $63,706 ±$4,994, and income per person $35,574 ±$2,143, 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 Fergus County by income, ACS 2020–2024
Household income	Households	Share	Montana	United States
Under $25,000	829 ±172	15.6% ±3.2	15.0% ±0.4	14.6% ±<0.1
$25,000 to $49,999	1,275 ±232	24.0% ±4.3	19.4% ±0.5	16.7% ±<0.1
$50,000 to $74,999	1,061 ±220	20.0% ±4.1	17.3% ±0.4	15.5% ±<0.1
$75,000 to $99,999	846 ±171	16.0% ±3.2	13.6% ±0.4	12.6% ±<0.1
$100,000 to $149,999	827 ±161	15.6% ±3.0	17.4% ±0.4	17.5% ±<0.1
$150,000 to $199,999	189 ±67	3.6% ±1.3	8.2% ±0.3	9.6% ±<0.1
$200,000 or more	276 ±90	5.2% ±1.7	9.0% ±0.3	13.4% ±0.1

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 Fergus County by age, ACS 2020–2024
Age	Below poverty	Rate	Montana	United States
All ages	1,722 ±423	15.1% ±3.7	11.5% ±0.3	12.5% ±0.1
Under 18	666 ±229	27.8% ±8.8	12.7% ±0.6	16.1% ±0.1
18 to 59	608 ±156	12.0% ±3.0	11.7% ±0.4	11.6% ±0.1
60 and over	448 ±159	11.4% ±3.9	10.3% ±0.4	11.0% ±<0.1

Housing, 2020–2024

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Housing in Fergus County, ACS 2020–2024
Measure	Fergus County	Montana	United States
Housing units	6,012 ±61	528,419 ±3,257	143,775,355 ±10,234
Occupied	88.2% ±3.1	86.8% ±0.5	89.9% ±0.1
Vacant	11.8% ±3.0	13.2% ±0.3	10.1% ±0.1
Owner occupied	63.4% ±4.6	69.2% ±0.6	65.2% ±0.3
Renter occupied	36.6% ±4.4	30.8% ±0.4	34.8% ±0.1
Median home value	$236,100 ±$24,690	$375,800 ±$3,433	$332,700 ±$236
Median gross rent	$954 ±$87	$1,081 ±$14	$1,413 ±$2
Median year built	1966 ±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 Fergus County by Hispanic origin and race, ACS 2020–2024
Origin	People	Share	Montana	United States
Hispanic or Latino	278 ±0	2.4% ±<0.1	4.6% ±<0.1	19.3% ±<0.1
White alone, not Hispanic	10,800 ±51	92.4% ±0.4	83.6% ±0.2	57.4% ±<0.1
Black alone, not Hispanic	13 to 119	0.1% to 1.0%	0.4% ±<0.1	11.9% ±<0.1
Asian alone, not Hispanic	19 to 133	0.2% to 1.1%	0.8% ±0.1	5.9% ±<0.1
American Indian and Alaska Native alone, not Hispanic	250 ±99	2.1% ±0.8	5.3% ±0.1	0.5% ±<0.1
Native Hawaiian and Other Pacific Islander alone, not Hispanic	0 to 18	0% to 0.2%	< 0.1% ±<0.1	0.2% ±<0.1
Some other race alone, not Hispanic	0 to 18	0% to 0.2%	0.5% ±0.1	0.6% ±<0.1
Two or more races, not Hispanic	217 ±73	1.9% ±0.6	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 Fergus County by place of birth and citizenship, ACS 2020–2024
Born	People	Share	Montana	United States
Born in the state	7,245 ±355	62.0% ±3.0	52.1% ±0.5	57.3% ±<0.1
Born in another state	4,096 ±348	35.0% ±3.0	44.8% ±0.4	26.9% ±<0.1
Born a citizen outside the states	18 to 168	0.2% to 1.4%	0.8% ±0.1	1.7% ±<0.1
Born abroad	116 to 390	1.0% to 3.3%	2.3% ±0.1	14.1% ±<0.1
Naturalized citizens	90 to 320	0.8% to 2.7%	1.2% ±0.1	7.4% ±<0.1
Not citizens	7 to 89	0.1% to 0.8%	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%.

Fergus County among the counties of Montana

18th of 56 by population, July 2025. Every one is listed on the Montana page.

Counties of Montana near Fergus County in population, July 2025
County	July 2025	Change since 2020
Sanders County	14,062	+12.9%
Glacier County	13,463	−2.0%
Jefferson County	13,329	+9.8%
Big Horn County	12,752	−2.5%
Custer County	12,034	+1.5%
Fergus County	11,825	+3.1%
Carbon County	11,466	+9.1%
Richland County	11,377	−1.3%
Roosevelt County	10,242	−5.2%
Beaverhead County	10,043	+7.1%
Madison County	10,026	+15.8%

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