Madison County, Montana Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates · 25th-largest in Montana
The population of Madison County, Montana is 8,975 as of the 2023 American Community Survey, making it the 25th-largest county in Montana. The median household income is $67,420, the median home value is $440,500, and the median age is 54.1.
The population of Madison County has grown 26.7% since 2010 (7,696 → 9,753), a +1.71% annualized rate.
8,975
Population
+1.71%
Annual growth
3
People / sq mi
$67,420
Median Income
$440,500
Median Home Value
Madison County covers 3,588 sq mi of land at 2.5 people per square mile.
About Madison County, MT
Age is the most distinctive thing about Madison County: a median age of 54.1, older than the national median. Madison County is a county in Montana with a population of 8,975. It ranks #25 among counties in Montana by population.
The typical household here earns about $67,420, below the US median of $78,538. Hardship is rare relative to US counties: a poverty rate of just 4.4%, below the national 12.4%. Housing is expensive: the median home is worth $440,500, with typical rent around $1,159.
About 34.3% of adults 25 and older have a bachelor’s degree, near the 35.0% national figure. An unusually large 20.1% of workers are remote, above the national 14.0%, and the average commute runs about 27 minutes each way.
The age structure shapes everything downstream in Madison County — from housing demand to the mix of working-age earners reflected in the income figures above.
Madison County Population History (2010-2024)
The county of Madison County had a population of 7,696 in 2010 and 9,753 in 2024, a 26.7% growth over 14 years. The peak was 9,753 in 2024. Average annual growth rate: 1.72%.
9,753
Population (2024)
7,696
Population (2010)
9,753
Peak (2024)
1.72%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 7,696 |
| 2011 | 7,644 |
| 2012 | 7,664 |
| 2013 | 7,679 |
| 2014 | 7,832 |
| 2015 | 8,033 |
| 2016 | 8,074 |
| 2017 | 8,280 |
| 2018 | 8,586 |
| 2019 | 8,749 |
| 2020 | 8,661 |
| 2021 | 8,954 |
| 2022 | 9,237 |
| 2023 | 9,509 |
| 2024 | 9,753 |
Race & Ethnicity
| White | 92.6% |
| Black or African American | 0.0% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 2.5% |
| Two or More Races | 0.0% |
Age & Sex
54.1
Median Age
46.9%
Female
53.1%
Male
30.6%
Age 65+
Age Distribution
Children (under 15): 12.8% · Seniors (65+): 30.6%
Income & Poverty
| Median household income | $67,420$-2,502 vs state |
| Mean household income | $85,732 |
| Per-capita income | $39,413 |
| Poverty rate | 4.4%-2.7% vs state |
| Unemployment rate | 0.8% |
| Employment-to-population | 52.8% |
Top Industries by Employment
The largest employment sector in Madison County is education & health care, accounting for 17.6% of workers.
How residents commute
1.1%
Drive alone
6.7%
Carpool
60.8%
Public transit
20.1%
Work from home
27.1 min
Avg commute
Housing
$440,500+$102,400 vs state
Median home value
$1,159
Median rent
80.6%
Homeownership rate
6,405
Total housing units
57.8%
Occupied
42.2%
Vacant
19.4%
Renter-occupied
Social & access
92.6%
With health insurance
93.5%
With broadband internet
58.9%
Foreign-born
10.4%
Veterans (18+)
13.5%
With a disability
95.7%
Speak language other than English at home
Education
95.4%
High School+
34.3%
Bachelor's+
Largest cities in Montana
Other counties in Montana
Part of Montana
Metro areas in Montana
County rankings
Frequently Asked Questions
Madison County, Montana has a population of 8,975 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 25th-largest county in Montana. Population density is 3 people per square mile.
The population of Madison County has grown 26.7% since 2010 (7,696 → 9,753), a +1.71% annualized rate.
The median household income in Madison County, Montana is $67,420, with mean (average) household income of $85,732 and per-capita income of $39,413. 4.4% of residents live below the federal poverty level.
In Madison County, the largest racial and ethnic groups are White (92.6%), Hispanic or Latino (2.5%). Figures are from the US Census Bureau's 2023 ACS 5-year estimates and reflect self-reported responses.
The median age in Madison County, Montana is 54.1 years. Residents are 46.9% female and 53.1% male.
The median home value in Madison County is $440,500 and median monthly rent is $1,159. 80.6% of occupied housing units are owner-occupied. The county has 6,405 total housing units, 42.2% of which are vacant.
The largest employment sector in Madison County, Montana is education, health care, and social assistance, employing 17.6% of workers. The unemployment rate is 0.8%.
Billings is among the largest cities associated with Madison County, Montana, with a population of 118,321.
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Statewide data for Montana
Population, race, income, age, and trends across Montana
Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.