Demographics of Carter County, Montana

Carter County, Montana had 1,383 people on July 1, 2025, by the Census Bureau’s estimate: −23 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.

Carter County, in four figures

1,383
Population: July 1, 2025, Vintage 2025 estimate.; −1.6%
Change since July 2020: −23 people.; 56.9 ±3.0
Median age: ACS 2020–⁠2024.; $54,167 ±$12,202
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.

Carter County, Montana's population shrank 1.6% from July 2020 to July 2025, against +3.1% nationally

The July 1 estimate of Carter 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

Carter County, Montana's population shrank 1.6% from July 2020 to July 2025, against +3.1% nationally. The July 1 estimate of Carter 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	1,406	100.0	100.0
2021	1,415	100.6	100.2
2022	1,400	99.6	100.7
2023	1,409	100.2	101.6
2024	1,422	101.1	102.5
2025	1,383	98.4	103.1

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Population of Carter County, Montana on July 1 of each year, Vintage 2025
July 1	Population	Change	Births less deaths	From elsewhere in the country
2020	1,406	−7	−3	−5
2021	1,415	+9	−6	+15
2022	1,400	−15	−1	−13
2023	1,409	+9	−5	+14
2024	1,422	+13	+3	+10
2025	1,383	−39	−2	−37

Age, 2020–2024

The median age is 56.9 ±3.0: for men 58.3 ±6.0 and for women 56.6 ±2.6. Shares are of everyone the survey counts, in the Bureau’s sex-by-age table (B01001).

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People in Carter County by age, ACS 2020–2024
Age	People	Share	Montana	United States
Under 5	86 ±31	6.6% ±2.3	5.2% ±<0.1	5.6% ±<0.1
5 to 17	145 ±41	11.1% ±2.9	15.8% ±0.2	16.3% ±<0.1
18 to 24	34 to 128	2.7% to 9.7%	9.0% ±0.2	9.1% ±<0.1
25 to 44	216 ±49	16.5% ±3.3	25.8% ±0.2	26.9% ±<0.1
45 to 64	373 ±66	28.5% ±4.1	24.1% ±0.2	24.8% ±<0.1
65 and over	407 ±64	31.1% ±3.7	20.1% ±0.2	17.2% ±<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%.

Income and poverty, 2020–2024

Median household income is $54,167 ±$12,202, and income per person $31,342 ±$3,351, 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 Carter County by income, ACS 2020–2024
Household income	Households	Share	Montana	United States
Under $25,000	122 ±48	20.3% ±7.6	15.0% ±0.4	14.6% ±<0.1
$25,000 to $49,999	150 ±53	25.0% ±8.5	19.4% ±0.5	16.7% ±<0.1
$50,000 to $74,999	109 ±34	18.2% ±5.3	17.3% ±0.4	15.5% ±<0.1
$75,000 to $99,999	97 ±33	16.2% ±5.2	13.6% ±0.4	12.6% ±<0.1
$100,000 to $149,999	90 ±31	15.0% ±4.9	17.4% ±0.4	17.5% ±<0.1
$150,000 to $199,999	6 to 24	1.0% to 4.0%	8.2% ±0.3	9.6% ±<0.1
$200,000 or more	6 to 28	1.0% to 4.6%	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 Carter County by age, ACS 2020–2024
Age	Below poverty	Rate	Montana	United States
All ages	198 ±80	15.4% ±6.0	11.5% ±0.3	12.5% ±0.1
Under 18	5 to 53	2.8% to 22.3%	12.7% ±0.6	16.1% ±0.1
18 to 59	33 to 111	7.3% to 22.3%	11.7% ±0.4	11.6% ±0.1
60 and over	97 ±48	17.1% ±8.0	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 Carter County, ACS 2020–2024
Measure	Carter County	Montana	United States
Housing units	829 ±57	528,419 ±3,257	143,775,355 ±10,234
Occupied	72.4% ±5.7	86.8% ±0.5	89.9% ±0.1
Vacant	27.6% ±5.6	13.2% ±0.3	10.1% ±0.1
Owner occupied	62.2% ±4.3	69.2% ±0.6	65.2% ±0.3
Renter occupied	37.8% ±9.0	30.8% ±0.4	34.8% ±0.1
Median home value	$199,200 ±$43,304	$375,800 ±$3,433	$332,700 ±$236
Median gross rent	$824 ±$70	$1,081 ±$14	$1,413 ±$2
Median year built	1975 ±4	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 Carter County by Hispanic origin and race, ACS 2020–2024
Origin	People	Share	Montana	United States
Hispanic or Latino	3 to 61	0.2% to 4.6%	4.6% ±<0.1	19.3% ±<0.1
White alone, not Hispanic	1,163 ±132	88.9% ±4.0	83.6% ±0.2	57.4% ±<0.1
Black alone, not Hispanic	0 to 9	0% to 0.7%	0.4% ±<0.1	11.9% ±<0.1
Asian alone, not Hispanic	0 to 11	0% to 0.8%	0.8% ±0.1	5.9% ±<0.1
American Indian and Alaska Native alone, not Hispanic	0 to 5	0% to 0.4%	5.3% ±0.1	0.5% ±<0.1
Native Hawaiian and Other Pacific Islander alone, not Hispanic	0 to 11	0% to 0.8%	< 0.1% ±<0.1	0.2% ±<0.1
Some other race alone, not Hispanic	0 to 3	0% to 0.2%	0.5% ±0.1	0.6% ±<0.1
Two or more races, not Hispanic	45 to 173	3.5% to 13.1%	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 Carter County by place of birth and citizenship, ACS 2020–2024
Born	People	Share	Montana	United States
Born in the state	535 ±95	40.9% ±5.9	52.1% ±0.5	57.3% ±<0.1
Born in another state	768 ±107	58.7% ±5.4	44.8% ±0.4	26.9% ±<0.1
Born a citizen outside the states	0 to 11	0% to 0.8%	0.8% ±0.1	1.7% ±<0.1
Born abroad	0 to 10	< 0.1% to 0.8%	2.3% ±0.1	14.1% ±<0.1
Naturalized citizens	0 to 4	< 0.1% to 0.3%	1.2% ±0.1	7.4% ±<0.1
Not citizens	0 to 7	0% to 0.5%	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%.

Carter County among the counties of Montana

50th of 56 by population, July 2025. Every one is listed on the Montana page.

Counties of Montana near Carter County in population, July 2025
County	July 2025	Change since 2020
Wheatland County	2,100	+1.2%
Liberty County	1,957	+0.1%
Powder River County	1,781	+5.1%
McCone County	1,720	−0.6%
Daniels County	1,612	−2.3%
Carter County	1,383	−1.6%
Garfield County	1,148	−1.9%
Prairie County	1,112	+1.6%
Wibaux County	885	−5.4%
Golden Valley County	844	+2.7%
Treasure County	728	−4.0%

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