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
Madison County is a county in Montana with a population of 8,975. It ranks #25 among counties in Montana by population. The median age is 54.1, older than the national median. The population is 53.1% male and 46.9% female.
The median household income in Madison County is $67,420, below the US median of $74,580. 4.4% of residents live below the federal poverty level. Home values sit at a median of $440,500, with monthly rent averaging $1,159. The homeownership rate of 80.6% is higher than the national rate of 64.8%.
Educational attainment in Madison County reflects 34.3% of adults 25 and older holding a bachelor's degree or higher, near the national average of 34.3%. Roughly 20.1% of workers primarily work from home, noticeably above the national work-from-home rate of 14.2%. The average commute is 27.1 minutes each way.
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.