Granite County, Montana Demographics
Population trends, housing costs, income, commuting, and health, all on one page.
Granite 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 Above averageAmong the top 3 healthiest counties in Montana
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D
Income Well below averageLess wealthy than 75% of counties in Montana
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C
Education Below averageBetter educated than 75% of counties in Montana
Source: Map AI Methodology
Population: density and quick facts
| Metric | Granite County | Montana Avg | U.S. Average |
|---|---|---|---|
| Population | 3,462 | 1,116,812 | 337,468,954 |
| Population density (per sq mi) | 2.0 | 7.6 | 86.4 |
| Population growth (%/yr) | 0.93% | 1.09% | 0.59% |
| Median age | 51.1 | 40.7 | 37.3 |
| Households | 1,514 | 458,835 | 130,235,071 |
Population in Granite County grew by 19.7% from 2009 to 2024, reaching 3,462 in 2024.
Population Growth 2009–2024
Race & Ethnicity
Age & Sex
The largest generation in Granite County is Boomers, aged 61–79, at 30.3% of residents. That is 10.9 points above Montana as a whole.
- Gen Z 13–28 468 13.5% -7.9 pts
- Millennials 29–44 522 15.1% -5.4 pts
- Gen X 45–60 822 23.8% +4.3 pts
- Boomers 61–79 1,048 30.3% +10.9 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 48.7% of the people living in Granite County and men 51.3%.
- Women 48.7% Montana 49.4%
- Men 51.3% Montana 50.6%
How many residents match a customer profile?
Residents matching this profile
100% of everyone living in Granite County
Pick an age range and a women/men split and the figure above answers with how many residents that profile reaches.
Economy
Granite County has a the economy index of D, which means it is barely prosperous.
| Metric | Granite County | Montana Avg | U.S. Average |
|---|---|---|---|
| Median household income | $59,374 | $72,476 | $80,455 |
| Income growth (%/yr) | 2.78% | 5.17% | 4.80% |
| Unemployment rate | 3.7% | 3.6% | 5.2% |
The median household income in Granite County is about 18% lower than in Montana.
Housing
| Metric | Granite County | Montana Avg | U.S. Average |
|---|---|---|---|
| Median home price | $416,666 | $249,140 | $248,835 |
| Median rent | $674 | $1,081 | $1,407 |
| Homeownership rate | 77.9% | 69.2% | 65.2% |
The median home price in Granite County is about 51.5 years' worth of rent — buying at the median price costs roughly as much as paying the median rent of $675 per month for that long.
Commute Time & Mobility
Commuters in Granite County spend about 47 minutes on the road round trip each working day. Over a typical 250-day work year, that adds up to roughly 194 hours, about 8.1 full days, spent commuting.
| Metric | Granite County | Montana Avg | U.S. Average |
|---|---|---|---|
| One-way commute (min) | 23.3 | 16.0 | 22.4 |
| Round-trip commute (min) | 46.6 | 32.1 | 44.8 |
| Yearly time spent (hours) | 194 | 134 | 187 |
| Estimated yearly cost | $6,014 | $4,143 | $5,790 |
| Work from home | 9.9% | 12.5% | 15.0% |
| Highway traffic (vehicles/day) | 2,563 | 2,162 | 8,813 |
| Local road traffic (vehicles/day) | 157 | 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 Granite County is 23 minutes, longer than the 16 minutes 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
Granite County has a education index of C, which means it is somewhat educated.
| Metric | Granite County | Montana Avg | U.S. Average |
|---|---|---|---|
| Bachelor's degree or higher | 28.7% | 31.3% | 31.6% |
| Average household size | 2.21 | 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
Granite County has a health index of A, which means it is very healthy.
| Metric | Granite County | Montana Avg | U.S. Average |
|---|---|---|---|
| Life expectancy (years) | 87.0 | 79.0 | 78.3 |
| Self-rated poor health | 13.7% | 14.7% | 16.3% |
| Smokers | 16.4% | 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).
Granite County, MT Compared With Nearby Counties
Granite County, MT is the smallest of the 4 counties compared here, 3,462 residents against a local median of 46,722. Granite County, MT's commute, at 23.3 min, runs 44% above the 16.1 min typical of the counties around it. That is the weaker end of the local range on this measure.
Median household income tells the same story from another angle: $59,374 against a local median of $71,257, 17% below it. Every measure here with a clear better direction points the same way, and it is the wrong way: Granite County, MT reads weaker than its neighbours on all of them. The counties themselves spread 5.5 min on commute, so Granite County, MT sits at one end of an already wide local range rather than apart from it. Granite County, MT has the 4th lowest commute of the 4 areas compared here.
| Area | Population | Median household income | Median home price | Commute |
|---|---|---|---|---|
| Granite County, MT | 3,462 | $59,374 #4/4 | $416,667 #3/4 | 23.3 min #4/4 |
| Ravalli County, MT | 46,722 | $71,257 | $1,571,428 | 18.5 min |
| Missoula County, MT | 120,671 | $75,565 | $463,380 | 16.1 min |
| Silver Bow County, MT | 35,793 | $61,292 | $165,062 | 13.0 min |
Frequently Asked Questions
Common questions about Granite County, Montana.
How big is Granite County, Montana by population?
About 3,462 people live in Granite County, Montana, in 1,514 households of 2.2 people on average. The median age is 51.1, so residents are older than the U.S. median of 37.3 by about 14 years.
How densely populated is Granite County, Montana?
Averaged over its land area, Granite County, Montana has 2 people per square mile, a density typical of rural areas. That is about 2% of the U.S. average of 86.
Is Granite County, Montana an affordable place to live?
The median home costs 7.0 times the median household income ($416,667 against $59,374), compared with 3.1 times nationally. A ratio of about 3 is traditionally considered affordable. Median rent of $675 a month takes about 14% 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 Granite County, Montana?
Unemployment in Granite County, Montana is only 3.7%, well below the U.S. rate of 5.2%, a sign of a tight labor market where employers compete for workers.
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