Gallatin County, Montana Demographics
Population trends, housing costs, income, commuting, and health, all on one page.
Gallatin County, MT Population Density Map and Area Scores
Area Score
Health, income and education, each graded from F to A+. Explore interactive maps for deeper analysis.
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A+
Health Top gradeHealthiest county in Montana
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B
Income Around averageAmong the top 5 wealthiest counties in Montana
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A
Education Above averageBest educated county in Montana
Source: Map AI Methodology
Population: density and quick facts
| Metric | Gallatin County | Montana Avg | U.S. Average |
|---|---|---|---|
| Population | 124,072 | 1,116,812 | 337,468,954 |
| Population density (per sq mi) | 47.1 | 7.6 | 86.4 |
| Population growth (%/yr) | 2.99% | 1.09% | 0.59% |
| Median age | 32.8 | 40.7 | 37.3 |
| Households | 51,211 | 458,835 | 130,235,071 |
Population in Gallatin County grew by 43.3% from 2009 to 2024, reaching 124,072 in 2024.
Population Growth 2009–2024
Race & Ethnicity
Age & Sex
The largest generation in Gallatin County is Gen Z, aged 13–28, at 29.3% of residents. That is 7.9 points above Montana as a whole.
- Gen Z 13–28 36,385 29.3% +7.9 pts
- Millennials 29–44 28,614 23.1% +2.6 pts
- Gen X 45–60 21,810 17.6% -1.9 pts
- Boomers 61–79 16,354 13.2% -6.2 pts
Residents by birth cohort, from the 2025 age distribution. The right-hand figure is how far each cohort's share sits above or below Montana, in percentage points. Children younger than Gen Z and the generations before the Boomers are counted in the population but not shown here, so these shares do not add up to 100%.
Male and female share
Women are 48.0% of the people living in Gallatin County and men 52.0%.
- Women 48.0% Montana 49.4%
- Men 52.0% Montana 50.6%
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Residents matching this profile
100% of everyone living in Gallatin County
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Economy
Gallatin County has a the economy index of B, which means it is quite prosperous.
| Metric | Gallatin County | Montana Avg | U.S. Average |
|---|---|---|---|
| Median household income | $95,089 | $72,476 | $80,455 |
| Income growth (%/yr) | 6.62% | 5.17% | 4.80% |
| Unemployment rate | 2.3% | 3.6% | 5.2% |
The median household income in Gallatin County is about 31% higher than in Montana.
Housing
| Metric | Gallatin County | Montana Avg | U.S. Average |
|---|---|---|---|
| Median home price | $980,852 | $249,140 | $248,835 |
| Median rent | $1,694 | $1,081 | $1,407 |
| Homeownership rate | 61.1% | 69.2% | 65.2% |
The median home price in Gallatin County is about 48.3 years' worth of rent — buying at the median price costs roughly as much as paying the median rent of $1,694 per month for that long.
Commute Time & Mobility
Commuters in Gallatin County spend about 33 minutes on the road round trip each working day. Over a typical 250-day work year, that adds up to roughly 137 hours, about 5.7 full days, spent commuting.
| Metric | Gallatin County | Montana Avg | U.S. Average |
|---|---|---|---|
| One-way commute (min) | 16.5 | 16.0 | 22.4 |
| Round-trip commute (min) | 33.0 | 32.1 | 44.8 |
| Yearly time spent (hours) | 137 | 134 | 187 |
| Estimated yearly cost | $4,261 | $4,143 | $5,790 |
| Work from home | 15.5% | 12.5% | 15.0% |
| Highway traffic (vehicles/day) | 4,783 | 2,162 | 8,813 |
| Local road traffic (vehicles/day) | 817 | 403 | 1,355 |
Fastest commutes among counties in
Montana:
Treasure County (7.2 min), Rosebud County (8.2 min), Fallon County (8.4 min).
Slowest:
Broadwater County (30.3 min), Stillwater County (27.8 min), Granite County (23.3 min).
The average commute time in Gallatin County is about the same as in Montana.
Estimated yearly cost applies a single national wage rule of thumb (U.S. Bureau of Labor Statistics average hourly earnings), not a measurement of wages in this area. Traffic volume figures come from proprietary Ticon and TrafficZoom data.
Education & Households
Gallatin County has a education index of A, which means it is very educated.
| Metric | Gallatin County | Montana Avg | U.S. Average |
|---|---|---|---|
| Bachelor's degree or higher | 45.3% | 31.3% | 31.6% |
| Average household size | 2.33 | 2.37 | 2.53 |
Highest education index among counties in
Montana:
Gallatin County (0.4), Missoula County (0.3), Lewis and Clark County (0.3).
Lowest:
Liberty County (0.2), Toole County (0.2), Wheatland County (0.2).
Health
Gallatin County has a health index of A+, which means it is exceptionally healthy.
| Metric | Gallatin County | Montana Avg | U.S. Average |
|---|---|---|---|
| Life expectancy (years) | 81.1 | 79.0 | 78.3 |
| Self-rated poor health | 8.9% | 14.7% | 16.3% |
| Smokers | 13.1% | 18.8% | 19.0% |
Highest health index among counties in
Montana:
Gallatin County (0.8), Missoula County (0.8), Granite County (0.8).
Lowest:
Glacier County (0.7), Big Horn County (0.8), Roosevelt County (0.8).
Frequently Asked Questions
Common questions about Gallatin County, Montana.
What is the population of Gallatin County, Montana?
About 124,072 people live in Gallatin County, Montana, in 51,211 households of 2.3 people on average. The median age is 32.8, so residents are younger than the U.S. median of 37.3 by about 5 years.
Is Gallatin County, Montana urban or rural?
Averaged over its land area, Gallatin County, Montana has 47 people per square mile, a density typical of rural areas. That is about 55% of the U.S. average of 86.
Is Gallatin County, Montana an affordable place to live?
The median home costs 10.3 times the median household income ($980,852 against $95,089), compared with 3.1 times nationally. A ratio of about 3 is traditionally considered affordable. Median rent of $1,694 a month takes about 21% of the median household's income, below the 30% level at which HUD considers renters cost-burdened.
Is it hard to find a job in Gallatin County, Montana?
Unemployment in Gallatin County, Montana is only 2.3%, well below the U.S. rate of 5.2%, a sign of a tight labor market where employers compete for workers.
How educated are people in Gallatin County, Montana?
45.3% of adults in Gallatin County, Montana hold a bachelor's degree or higher (about 1 in 2), well above the U.S. share of 31.6%.
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