County · Montana
Madison County, Montana
Madison County, Montana. Madison County had 10,026 residents in 2025 by the Census Bureau's estimate, up 16.3% since 2020, faster than Montana (+5.6%). It holds 14 places (4 cities, villages and boroughs and 10 census-designated) and 4 census tracts. GEOID 30057.
Residents, July 2025 estimate
10,026
Census Bureau estimate (no margin published)
2020 Census count: 8,623 · ACS 2020-2024: 9,223
Median household income
$75,250
±$4,431 (90% margin)
Montana: $72,509
Median home value
$470,100
±$34,219 (90% margin)
Montana: $375,800
Median gross rent
$1,000
±$277 (90% margin)
Montana: $1,081
How many people live in Madison County, and is it growing?
The 2020 Census counted 8,623 residents in Madison County. The Census Bureau estimates 10,026 for July 1, 2025, up 16.3% since 2020, faster than Montana (+5.6%). The 2020-2024 American Community Survey puts the population at 9,223 over 3,588 square miles of land.
| Measure | Madison County | Montana | Change since 2015-2019 |
|---|---|---|---|
| Total population | 9,223 | 1,116,875 | +921 |
| Households | 3,740±194 | 458,859 | no clear change |
| Average household size | 2.42±0.12 | 2.37 | +0.18 |
| Housing units | 6,396±35 | 528,419 | −606 |
Madison County's population since 2000
From 6,851 in 2000 to 10,026 in 2025: up 46.3%. The 2000, 2010 and 2020 figures are census counts. The 2005 figure is the Census Bureau's intercensal estimate, revised to fit the 2000 and 2010 counts and drawn on 2010 boundaries; 2015 and 2025 are July 1 estimates made from the census before them.
Source: The 2000, 2010 and 2020 Census counts and the Census Bureau's population estimates (intercensal 2000-2010, Vintage 2020, Vintage 2025) · Census population estimates
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); PEP Vintage 2025 (CO-EST2025); 2020 Census · Check it at data.census.gov
What cities and towns are in Madison County?
Madison County holds 14 places: 4 cities, villages and boroughs (incorporated places) and 10 census-designated places. The largest is Ennis with 1,126 residents (2025 estimate). Places that cross a county line are listed with the share of their 2020 residents who live in this county.
| Ennis | 917 | $69,650 |
|---|---|---|
| Sheridan | 694 | $87,321 |
| Big Sky | 3,591 | $138,805 |
| Twin BridgesGEOID 3075475 | 330 | $57,188 |
| McAllisterGEOID 3046225 | 278 | not published |
| Virginia CityGEOID 3077125 | 219 | $61,875 |
| PonyGEOID 3058900 | 127 | $66,667 |
| HarrisonGEOID 3034525 | 105 | $72,656 |
| AlderGEOID 3000850 | 86 | $42,500 |
| BrandonGEOID 3009400 | 46 | $110,577 |
| Silver StarGEOID 3068500 | 46 | $48,438 |
| NorrisGEOID 3054475 | 46 | not published |
| JeffersGEOID 3039325 | 25 | not published |
| MammothGEOID 3047460 | 4 | not published |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); 2020 place-by-county parts · Check it at data.census.gov
Who lives in Madison County?
The median resident of Madison County is 52.2 years old; 16.3% are under 18 and 30.8% are 65 or older. The largest group is non-Hispanic white residents at 90.4%, then Hispanic or Latino residents (of any race) at 3.7%. 2.8% of residents were born outside the United States.
| Measure | Madison County | Montana | Change since 2015-2019 |
|---|---|---|---|
| Median age | 52.2±0.9 | 40.4 | no clear change |
| Under 18 years | 16.3%±0.5 pts | 21.0% | – |
| 65 years and over | 30.8%±0.4 pts | 20.1% | – |
| Hispanic or Latino (any race) | 3.7% | 4.6% | −0.8 pts |
| White alone, not Hispanic | 90.4%±1.3 pts | 83.6% | −2.1 pts |
| Black or African American alone, not Hispanic | 0.0%±0.3 pts | 0.4% | – |
| Asian alone, not Hispanic | 0.5%±0.5 pts | 0.8% | – |
| American Indian and Alaska Native alone, not Hispanic | 0.3%±0.2 pts | 5.3% | – |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0%±0.3 pts | 0.0% | – |
| Two or more races, not Hispanic | 3.5%±0.8 pts | 4.7% | – |
| Some other race alone, not Hispanic | 1.7%±1.1 pts | 0.5% | – |
| Born outside the United States | 2.8%±1.0 pts | 2.3% | no clear change |
| Speak a language other than English at home (age 5+) | 4.3%±1.2 pts | 4.2% | – |
| Civilian veterans (age 18+) | 9.8%±2.2 pts | 9.0% | – |
| With a disability | 14.4%±2.8 pts | 14.5% | – |
| No health insurance coverage | 7.1%±1.7 pts | 8.6% | no clear change |
| High school graduate or higher (age 25+) | 93.9%±1.6 pts | 94.6% | – |
| Bachelor's degree or higher (age 25+) | 32.6%±3.5 pts | 35.2% | no clear change |
| Graduate or professional degree (age 25+) | 8.3%±1.8 pts | 12.0% | – |
| Moved from another state in the past year | 4.1%±1.6 pts | 3.7% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profiles DP02, DP05) · Check it at data.census.gov
What do households in Madison County earn?
Half of Madison County's 3,740 households earn less than $75,250 a year (±$4,431), against $72,509 in Montana. In 2015-2019 the median was $66,589 in 2024 dollars, so it rose by $8,661 after inflation. 6.2% of residents live below the poverty line.
| Measure | Madison County | Montana | Change since 2015-2019 |
|---|---|---|---|
| Median household income | $75,250±$4,431 | $72,509 | +$8,661 |
| Mean household income | $98,856±$9,920 | $98,908 | – |
| Per capita income | $43,428±$3,280 | $41,711 | no clear change |
| People below the poverty line | 6.2%±1.6 pts | 11.5% | no clear change |
| Children under 18 below the poverty line | 7.1%±4.1 pts | 12.7% | no clear change |
| Households receiving SNAP | 3.5%±1.8 pts | 7.8% | – |
| Households with a broadband subscription | 89.4%±2.7 pts | 89.4% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
What does housing cost in Madison County?
Owners occupy 81.0% of Madison County's occupied homes and renters 19.0%. The median owner-occupied home is valued at $470,100 by its owner (±$34,219). The median renter pays $1,000 a month including utilities, and 25.7% of renters pay 35% or more of their income on rent.
| Measure | Madison County | Montana | Change since 2015-2019 |
|---|---|---|---|
| Median home value (owner-occupied) | $470,100±$34,219 | $375,800 | +$129,813 |
| Median gross rent | $1,000±$277 | $1,081 | no clear change |
| Renters paying 35% or more of income on rent | 25.7%±10.5 pts | 35.5% | no clear change |
| Median monthly owner costs, with a mortgage | $1,742±$188 | $1,798 | – |
| Owner-occupied homes | 81.0%±3.5 pts | 69.2% | no clear change |
| Housing units | 6,396±35 | 528,419 | −606 |
| Homeowner vacancy rate | 0.3%±0.5 pts | 0.9% | – |
| Rental vacancy rate | 18.1%±10.7 pts | 5.3% | – |
| Single-family detached homes | 79.1%±3.1 pts | 68.8% | – |
| Mobile homes | 6.7%±1.5 pts | 9.4% | – |
| Built 2020 or later | 1.7%±1.0 pts | 2.3% | – |
| Built 1939 or earlier | 11.2%±2.1 pts | 12.8% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP04) · Check it at data.census.gov
How many new homes is Madison County building?
Builders took permits for 7 new housing units across Madison County in 2025 (5 single-family), 0.7 per 1,000 residents.
Source: Building Permits Survey, annual county files 2019-2025, U.S. Census Bureau · Census Building Permits Survey
How do people in Madison County get to work?
61.7% of Madison County's workers drive alone and 20.5% work from home. The average trip to work takes 25.8 minutes. The unemployment rate in 2020-2024 averaged 3.1%.
| Measure | Madison County | Montana | Change since 2015-2019 |
|---|---|---|---|
| In the labor force (age 16+) | 55.2%±2.7 pts | 62.9% | – |
| Unemployment rate | 3.1%±1.8 pts | 3.6% | no clear change |
| Drove alone to work | 61.7%±3.7 pts | 71.1% | – |
| Carpooled | 10.7%±2.9 pts | 9.7% | – |
| Public transportation | 0.0%±0.7 pts | 0.6% | – |
| Walked | 5.2%±1.9 pts | 3.9% | – |
| Worked from home | 20.5%±3.3 pts | 12.5% | +10.2 pts |
| Mean travel time to work | 25.8 min±2.4 | 19.1 min | +4.9 min |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
What are Madison County's census tracts?
Madison County is divided into 4 census tracts. Among those with a reliable estimate, median household income runs from $55,625 (Tract 1.01) to $88,250 (Tract 1.02).
| Tract 1.0130057000101 | 2,087±301 | $55,625 |
|---|---|---|
| Tract 1.0230057000102 | 2,091±353 | $88,250 |
| Tract 230057000200 | 2,690±291 | $74,795 |
| Tract 330057000300 | 2,355±241 | $75,772 |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) · Check it at data.census.gov
How does Madison County compare with Montana's other counties?
| Measure | Rank |
|---|---|
| Population | 24th of 56 |
| Growth 2020-2025 | 3rd of 56 |
| Residents per square mile | 32nd of 56 |
| Median household income | 10th of 56 |
| Median home value | 5th of 56 |
| Median gross rent | 10th of 56 |
| Poverty rate | 53rd of 56 |
| Bachelor's degree or higher | 11th of 56 |
| Median age | 9th of 56 |
Source: PlainCities ranks from the American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) and PEP Vintage 2025 · How ranks are computed
How these figures are made: methodology and release checks · reading a margin of error · every state · corrections
Not on this page: crime, weather and schools for Madison County are other agencies' records. Crime: the FBI's Crime Data Explorer · climate: NOAA's U.S. Climate Normals · schools: the National Center for Education Statistics' school search.