Demographics of Carbon County, Montana

Carbon County, Montana had 11,466 people on July 1, 2025, by the Census Bureau’s estimate: +955 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.

Carbon County, in four figures

11,466
Population: July 1, 2025, Vintage 2025 estimate.; +9.1%
Change since July 2020: +955 people.; 50.4 ±0.4
Median age: ACS 2020–⁠2024.; $80,261 ±$9,036
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.

Carbon County, Montana's population grew 9.1% from July 2020 to July 2025, against +3.1% nationally

The July 1 estimate of Carbon 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

Carbon County, Montana's population grew 9.1% from July 2020 to July 2025, against +3.1% nationally. The July 1 estimate of Carbon 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	10,511	100.0	100.0
2021	10,901	103.7	100.2
2022	11,237	106.9	100.7
2023	11,420	108.6	101.6
2024	11,504	109.4	102.5
2025	11,466	109.1	103.1

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Population of Carbon 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	10,511	+35	−24	0	+67
2021	10,901	+390	−27	+11	+431
2022	11,237	+336	−23	+12	+333
2023	11,420	+183	−11	−1	+189
2024	11,504	+84	+7	+2	+75
2025	11,466	−38	+16	−6	−47

Age, 2020–2024

The median age is 50.4 ±0.4: for men 50.6 ±0.7 and for women 50.3 ±0.6. Shares are of everyone the survey counts, in the Bureau’s sex-by-age table (B01001).

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People in Carbon County by age, ACS 2020–2024
Age	People	Share	Montana	United States
Under 5	420 ±18	3.8% ±0.2	5.2% ±<0.1	5.6% ±<0.1
5 to 17	1,487 ±149	13.4% ±1.3	15.8% ±0.2	16.3% ±<0.1
18 to 24	627 ±145	5.6% ±1.3	9.0% ±0.2	9.1% ±<0.1
25 to 44	2,333 ±282	21.0% ±2.5	25.8% ±0.2	26.9% ±<0.1
45 to 64	3,131 ±295	28.2% ±2.6	24.1% ±0.2	24.8% ±<0.1
65 and over	3,118 ±461	28.0% ±4.1	20.1% ±0.2	17.2% ±<0.1

Income and poverty, 2020–2024

Median household income is $80,261 ±$9,036, and income per person $45,872 ±$4,165, 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 Carbon County by income, ACS 2020–2024
Household income	Households	Share	Montana	United States
Under $25,000	736 ±317	2.6% to 28.9%	15.0% ±0.4	14.6% ±<0.1
$25,000 to $49,999	810 ±288	3.5% to 31.2%	19.4% ±0.5	16.7% ±<0.1
$50,000 to $74,999	320 to 1,030	1.7% to 27.3%	17.3% ±0.4	15.5% ±<0.1
$75,000 to $99,999	70 to 1,134	6.2% to 19.7%	13.6% ±0.4	12.6% ±<0.1
$100,000 to $149,999	283 to 1,551	0.1% to 39.2%	17.4% ±0.4	17.5% ±<0.1
$150,000 to $199,999	138 to 688	0.2% to 17.5%	8.2% ±0.3	9.6% ±<0.1
$200,000 or more	107 to 915	11.0% ±3.7	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 Carbon County by age, ACS 2020–2024
Age	Below poverty	Rate	Montana	United States
All ages	859 ±213	7.8% ±1.9	11.5% ±0.3	12.5% ±0.1
Under 18	132 ±64	7.0% ±3.3	12.7% ±0.6	16.1% ±0.1
18 to 59	452 ±124	9.3% ±2.5	11.7% ±0.4	11.6% ±0.1
60 and over	275 ±99	6.4% ±2.3	10.3% ±0.4	11.0% ±<0.1

Housing, 2020–2024

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Housing in Carbon County, ACS 2020–2024
Measure	Carbon County	Montana	United States
Housing units	3,143 to 9,767	528,419 ±3,257	143,775,355 ±10,234
Occupied	36.5% to 100.0%	86.8% ±0.5	89.9% ±0.1
Vacant	13.1% to 42.4%	13.2% ±0.3	10.1% ±0.1
Owner occupied	78.0% ±27.4	69.2% ±0.6	65.2% ±0.3
Renter occupied	3.3% to 40.7%	30.8% ±0.4	34.8% ±0.1
Median home value	$420,800 ±$24,845	$375,800 ±$3,433	$332,700 ±$236
Median gross rent	$844 ±$113	$1,081 ±$14	$1,413 ±$2
Median year built	1977 ±4	1981 ±1	1980 ±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%.

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 Carbon County by Hispanic origin and race, ACS 2020–2024
Origin	People	Share	Montana	United States
Hispanic or Latino	337 ±0	3.0% ±<0.1	4.6% ±<0.1	19.3% ±<0.1
White alone, not Hispanic	10,020 ±122	90.1% ±1.1	83.6% ±0.2	57.4% ±<0.1
Black alone, not Hispanic	0 to 88	0% to 0.8%	0.4% ±<0.1	11.9% ±<0.1
Asian alone, not Hispanic	0 to 9	0% to 0.1%	0.8% ±0.1	5.9% ±<0.1
American Indian and Alaska Native alone, not Hispanic	3 to 37	< 0.1% to 0.3%	5.3% ±0.1	0.5% ±<0.1
Native Hawaiian and Other Pacific Islander alone, not Hispanic	0 to 57	0% to 0.5%	< 0.1% ±<0.1	0.2% ±<0.1
Some other race alone, not Hispanic	65 to 287	0.6% to 2.6%	0.5% ±0.1	0.6% ±<0.1
Two or more races, not Hispanic	503 ±106	4.5% ±1.0	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 Carbon County by place of birth and citizenship, ACS 2020–2024
Born	People	Share	Montana	United States
Born in the state	5,139 ±426	46.2% ±3.8	52.1% ±0.5	57.3% ±<0.1
Born in another state	5,846 ±397	52.6% ±3.6	44.8% ±0.4	26.9% ±<0.1
Born a citizen outside the states	6 to 118	0.1% to 1.1%	0.8% ±0.1	1.7% ±<0.1
Born abroad	24 to 114	0.2% to 1.0%	2.3% ±0.1	14.1% ±<0.1
Naturalized citizens	8 to 40	0.1% to 0.4%	1.2% ±0.1	7.4% ±<0.1
Not citizens	3 to 87	< 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%.

Carbon County among the counties of Montana

19th of 56 by population, July 2025. Every one is listed on the Montana page.

Counties of Montana near Carbon County in population, July 2025
County	July 2025	Change since 2020
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%
Deer Lodge County	9,709	+3.0%

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