Demographics of Madison County, Montana

Madison County, Montana had 10,026 people on July 1, 2025, by the Census Bureau’s estimate: +1,369 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.

Madison County, in four figures

10,026
Population: July 1, 2025, Vintage 2025 estimate.; +15.8%
Change since July 2020: +1,369 people.; 52.2 ±0.9
Median age: ACS 2020–⁠2024.; $75,250 ±$4,431
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.

Madison County, Montana's population grew 15.8% from July 2020 to July 2025, against +3.1% nationally

The July 1 estimate of Madison 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

Madison County, Montana's population grew 15.8% from July 2020 to July 2025, against +3.1% nationally. The July 1 estimate of Madison 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	8,657	100.0	100.0
2021	8,954	103.4	100.2
2022	9,240	106.7	100.7
2023	9,520	110.0	101.6
2024	9,772	112.9	102.5
2025	10,026	115.8	103.1

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Population of Madison 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	8,657	+35	−17	+2	+56
2021	8,954	+297	−41	+26	+332
2022	9,240	+286	−42	+21	+285
2023	9,520	+280	−23	+8	+290
2024	9,772	+252	−20	+12	+257
2025	10,026	+254	−24	+1	+283

Age, 2020–2024

The median age is 52.2 ±0.9: for men 51.5 ±1.5 and for women 53.2 ±1.7. Shares are of everyone the survey counts, in the Bureau’s sex-by-age table (B01001).

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People in Madison County by age, ACS 2020–2024
Age	People	Share	Montana	United States
Under 5	432 ±43	4.7% ±0.5	5.2% ±<0.1	5.6% ±<0.1
5 to 17	1,072 ±128	11.6% ±1.4	15.8% ±0.2	16.3% ±<0.1
18 to 24	525 ±161	5.7% ±1.7	9.0% ±0.2	9.1% ±<0.1
25 to 44	1,912 ±149	20.7% ±1.6	25.8% ±0.2	26.9% ±<0.1
45 to 64	2,443 ±183	26.5% ±2.0	24.1% ±0.2	24.8% ±<0.1
65 and over	2,839 ±266	30.8% ±2.9	20.1% ±0.2	17.2% ±<0.1

Income and poverty, 2020–2024

Median household income is $75,250 ±$4,431, and income per person $43,428 ±$3,280, 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 Madison County by income, ACS 2020–2024
Household income	Households	Share	Montana	United States
Under $25,000	359 ±108	9.6% ±2.8	15.0% ±0.4	14.6% ±<0.1
$25,000 to $49,999	850 ±187	22.7% ±4.9	19.4% ±0.5	16.7% ±<0.1
$50,000 to $74,999	652 ±117	17.4% ±3.0	17.3% ±0.4	15.5% ±<0.1
$75,000 to $99,999	573 ±133	15.3% ±3.5	13.6% ±0.4	12.6% ±<0.1
$100,000 to $149,999	763 ±146	20.4% ±3.8	17.4% ±0.4	17.5% ±<0.1
$150,000 to $199,999	281 ±96	7.5% ±2.5	8.2% ±0.3	9.6% ±<0.1
$200,000 or more	262 ±76	7.0% ±2.0	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 Madison County by age, ACS 2020–2024
Age	Below poverty	Rate	Montana	United States
All ages	565 ±144	6.2% ±1.6	11.5% ±0.3	12.5% ±0.1
Under 18	105 ±44	7.1% ±2.9	12.7% ±0.6	16.1% ±0.1
18 to 59	241 ±88	6.0% ±2.2	11.7% ±0.4	11.6% ±0.1
60 and over	219 ±86	6.0% ±2.3	10.3% ±0.4	11.0% ±<0.1

Housing, 2020–2024

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Housing in Madison County, ACS 2020–2024
Measure	Madison County	Montana	United States
Housing units	6,396 ±35	528,419 ±3,257	143,775,355 ±10,234
Occupied	58.5% ±3.0	86.8% ±0.5	89.9% ±0.1
Vacant	41.5% ±2.9	13.2% ±0.3	10.1% ±0.1
Owner occupied	81.0% ±0.7	69.2% ±0.6	65.2% ±0.3
Renter occupied	19.0% ±3.9	30.8% ±0.4	34.8% ±0.1
Median home value	$470,100 ±$34,219	$375,800 ±$3,433	$332,700 ±$236
Median gross rent	$1,000 ±$277	$1,081 ±$14	$1,413 ±$2
Median year built	1995 ±3	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 Madison County by Hispanic origin and race, ACS 2020–2024
Origin	People	Share	Montana	United States
Hispanic or Latino	337 ±0	3.7% ±<0.1	4.6% ±<0.1	19.3% ±<0.1
White alone, not Hispanic	8,339 ±119	90.4% ±1.3	83.6% ±0.2	57.4% ±<0.1
Black alone, not Hispanic	0 to 16	0% to 0.2%	0.4% ±<0.1	11.9% ±<0.1
Asian alone, not Hispanic	0 to 87	0% to 0.9%	0.8% ±0.1	5.9% ±<0.1
American Indian and Alaska Native alone, not Hispanic	6 to 50	0.1% to 0.5%	5.3% ±0.1	0.5% ±<0.1
Native Hawaiian and Other Pacific Islander alone, not Hispanic	0 to 16	0% to 0.2%	< 0.1% ±<0.1	0.2% ±<0.1
Some other race alone, not Hispanic	51 to 255	0.6% to 2.8%	0.5% ±0.1	0.6% ±<0.1
Two or more races, not Hispanic	324 ±71	3.5% ±0.8	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 Madison County by place of birth and citizenship, ACS 2020–2024
Born	People	Share	Montana	United States
Born in the state	3,390 ±263	36.8% ±2.9	52.1% ±0.5	57.3% ±<0.1
Born in another state	5,480 ±257	59.4% ±2.8	44.8% ±0.4	26.9% ±<0.1
Born a citizen outside the states	46 to 152	0.5% to 1.6%	0.8% ±0.1	1.7% ±<0.1
Born abroad	254 ±90	2.8% ±1.0	2.3% ±0.1	14.1% ±<0.1
Naturalized citizens	156 ±61	1.7% ±0.7	1.2% ±0.1	7.4% ±<0.1
Not citizens	38 to 158	0.4% to 1.7%	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%.

Madison County among the counties of Montana

23rd of 56 by population, July 2025. Every one is listed on the Montana page.

Counties of Montana near Madison County in population, July 2025
County	July 2025	Change since 2020
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%
Stillwater County	9,445	+5.0%
Dawson County	8,692	−2.6%
Broadwater County	8,493	+23.8%
Rosebud County	8,253	−0.7%

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