County · Montana
Gallatin County, Montana
Gallatin County, Montana. Gallatin County had 128,740 residents in 2025 by the Census Bureau's estimate, up 8.2% since 2020, faster than Montana (+5.6%). It holds 19 places (5 cities, villages and boroughs and 14 census-designated) and 26 census tracts. GEOID 30031.
Gallatin County is the county of the Bozeman, MT metropolitan statistical area (the Census Bureau's July 2023 delineation).
Residents, July 2025 estimate
128,740
Census Bureau estimate (no margin published)
2020 Census count: 118,960 · ACS 2020-2024: 124,074
Median household income
$93,528
±$3,326 (90% margin)
Montana: $72,509
Median home value
$667,600
±$15,234 (90% margin)
Montana: $375,800
Median gross rent
$1,694
±$60 (90% margin)
Montana: $1,081
How many people live in Gallatin County, and is it growing?
The 2020 Census counted 118,960 residents in Gallatin County. The Census Bureau estimates 128,740 for July 1, 2025, up 8.2% since 2020, faster than Montana (+5.6%). The 2020-2024 American Community Survey puts the population at 124,074 over 2,605 square miles of land.
| Measure | Gallatin County | Montana | Change since 2015-2019 |
|---|---|---|---|
| Total population | 124,074 | 1,116,875 | +16,011 |
| Households | 51,215±510 | 458,859 | +7,438 |
| Average household size | 2.33±0.02 | 2.37 | −0.04 |
| Housing units | 57,568±62 | 528,419 | +8,090 |
Gallatin County's population since 2000
From 67,831 in 2000 to 128,740 in 2025: up 89.8%. 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 Gallatin County?
Gallatin County holds 19 places: 5 cities, villages and boroughs (incorporated places) and 14 census-designated places. The largest is Bozeman with 58,814 residents (2025 estimate). Places that cross a county line are listed with the share of their 2020 residents who live in this county.
| Bozeman | 53,293 | $85,747 |
|---|---|---|
| Belgrade | 10,460 | $97,328 |
| Four Corners | 5,901 | $100,917 |
| Big Sky | 3,591 | $138,805 |
| Manhattan | 2,086 | $87,865 |
| Three Forks | 1,989 | $79,784 |
| King Arthur ParkGEOID 3040685 | 1,549 | $109,106 |
| West Yellowstone | 1,272 | $58,839 |
| Churchill | 1,030 | $108,281 |
| Gallatin Gateway | 967 | $82,500 |
| Ponderosa PinesGEOID 3058840 | 665 | $73,681 |
| Willow CreekGEOID 3080800 | 230 | $62,857 |
| AmsterdamGEOID 3001525 | 206 | $85,750 |
| Hebgen Lake EstatesGEOID 3035435 | 123 | $41,563 |
| SpringhillGEOID 3070375 | 120 | $79,115 |
| Gallatin River RanchGEOID 3029885 | 117 | $101,250 |
| SedanGEOID 3067075 | 101 | $93,906 |
| LoganGEOID 3044500 | 72 | not published |
| Bridger, Gallatin CountyGEOID 3009500 | 72 | 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 Gallatin County?
The median resident of Gallatin County is 34.2 years old; 18.8% are under 18 and 13.6% are 65 or older. The largest group is non-Hispanic white residents at 87.5%, then Hispanic or Latino residents (of any race) at 5.4%. 4.1% of residents were born outside the United States.
| Measure | Gallatin County | Montana | Change since 2015-2019 |
|---|---|---|---|
| Median age | 34.2±0.2 | 40.4 | +0.8 |
| Under 18 years | 18.8%±0.1 pts | 21.0% | – |
| 65 years and over | 13.6%±0.1 pts | 20.1% | – |
| Hispanic or Latino (any race) | 5.4% | 4.6% | +1.7 pts |
| White alone, not Hispanic | 87.5%±0.5 pts | 83.6% | −4.1 pts |
| Black or African American alone, not Hispanic | 0.4%±0.1 pts | 0.4% | no clear change |
| Asian alone, not Hispanic | 1.2%±0.2 pts | 0.8% | no clear change |
| American Indian and Alaska Native alone, not Hispanic | 0.5%±0.1 pts | 5.3% | – |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0%±0.1 pts | 0.0% | – |
| Two or more races, not Hispanic | 4.0%±0.5 pts | 4.7% | – |
| Some other race alone, not Hispanic | 0.8%±0.3 pts | 0.5% | – |
| Born outside the United States | 4.1%±0.5 pts | 2.3% | +0.8 pts |
| Speak a language other than English at home (age 5+) | 5.2%±0.6 pts | 4.2% | – |
| Civilian veterans (age 18+) | 5.1%±0.6 pts | 9.0% | – |
| With a disability | 8.9%±0.7 pts | 14.5% | – |
| No health insurance coverage | 6.9%±0.8 pts | 8.6% | no clear change |
| High school graduate or higher (age 25+) | 97.2%±0.5 pts | 94.6% | – |
| Bachelor's degree or higher (age 25+) | 54.3%±1.8 pts | 35.2% | +4.2 pts |
| Graduate or professional degree (age 25+) | 20.3%±1.2 pts | 12.0% | – |
| Moved from another state in the past year | 6.3%±1.0 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 Gallatin County earn?
Half of Gallatin County's 51,215 households earn less than $93,528 a year (±$3,326), against $72,509 in Montana. In 2015-2019 the median was $81,714 in 2024 dollars, so it rose by $11,814 after inflation. 9.5% of residents live below the poverty line.
| Measure | Gallatin County | Montana | Change since 2015-2019 |
|---|---|---|---|
| Median household income | $93,528±$3,326 | $72,509 | +$11,814 |
| Mean household income | $132,508±$4,688 | $98,908 | – |
| Per capita income | $54,482±$1,929 | $41,711 | +$9,040 |
| People below the poverty line | 9.5%±1.0 pts | 11.5% | −1.8 pts |
| Children under 18 below the poverty line | 6.4%±2.4 pts | 12.7% | no clear change |
| Households receiving SNAP | 2.8%±0.6 pts | 7.8% | – |
| Households with a broadband subscription | 93.3%±1.0 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 Gallatin County?
Owners occupy 61.1% of Gallatin County's occupied homes and renters 38.9%. The median owner-occupied home is valued at $667,600 by its owner (±$15,234). The median renter pays $1,694 a month including utilities, and 38.8% of renters pay 35% or more of their income on rent.
| Measure | Gallatin County | Montana | Change since 2015-2019 |
|---|---|---|---|
| Median home value (owner-occupied) | $667,600±$15,234 | $375,800 | +$228,119 |
| Median gross rent | $1,694±$60 | $1,081 | +$372 |
| Renters paying 35% or more of income on rent | 38.8%±3.0 pts | 35.5% | no clear change |
| Median monthly owner costs, with a mortgage | $2,299±$55 | $1,798 | – |
| Owner-occupied homes | 61.1%±1.4 pts | 69.2% | no clear change |
| Housing units | 57,568±62 | 528,419 | +8,090 |
| Homeowner vacancy rate | 0.8%±0.4 pts | 0.9% | – |
| Rental vacancy rate | 6.2%±1.6 pts | 5.3% | – |
| Single-family detached homes | 57.8%±1.4 pts | 68.8% | – |
| Mobile homes | 5.4%±0.9 pts | 9.4% | – |
| Built 2020 or later | 4.2%±0.7 pts | 2.3% | – |
| Built 1939 or earlier | 7.1%±0.7 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 Gallatin County building?
Builders took permits for 1,544 new housing units across Gallatin County in 2025 (843 single-family), 12.0 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 Gallatin County get to work?
68.6% of Gallatin County's workers drive alone and 15.5% work from home. The average trip to work takes 18.3 minutes. The unemployment rate in 2020-2024 averaged 2.3%.
| Measure | Gallatin County | Montana | Change since 2015-2019 |
|---|---|---|---|
| In the labor force (age 16+) | 71.2%±1.1 pts | 62.9% | – |
| Unemployment rate | 2.3%±0.6 pts | 3.6% | no clear change |
| Drove alone to work | 68.6%±1.6 pts | 71.1% | – |
| Carpooled | 7.4%±0.9 pts | 9.7% | – |
| Public transportation | 0.5%±0.2 pts | 0.6% | – |
| Walked | 5.3%±0.7 pts | 3.9% | – |
| Worked from home | 15.5%±1.2 pts | 12.5% | +7.4 pts |
| Mean travel time to work | 18.3 min±0.6 | 19.1 min | no clear change |
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 Gallatin County's census tracts?
Gallatin County is divided into 26 census tracts. Among those with a reliable estimate, median household income runs from $50,242 (Tract 11.01) to $144,554 (Tract 10.01).
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) · Check it at data.census.gov
How does Gallatin County compare with Montana's other counties?
| Measure | Rank |
|---|---|
| Population | 2nd of 56 |
| Growth 2020-2025 | 14th of 56 |
| Residents per square mile | 3rd of 56 |
| Median household income | 2nd of 56 |
| Median home value | 1st of 56 |
| Median gross rent | 1st of 56 |
| Poverty rate | 41st of 56 |
| Bachelor's degree or higher | 1st of 56 |
| Median age | 53rd 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 Gallatin 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.