3rd most populous of 56
With 122,546 residents in 2024, Missoula County ranks 3rd by population among Montana's 56 counties and is home to 10.8% of the state's residents.

Missoula County has the lowest homeownership rate in Montana (58.8%) and the 2nd highest share of college graduates (47.4% of adults).
Missoula County is home to 122,546 people (2024 estimate) on 2,593 square miles of land. This page brings together official U.S. Census Bureau population estimates since 2000, the components of change—births, deaths and migration—American Community Survey indicators on income, housing, poverty and education, BEA economic accounts and BLS unemployment.
Pick an indicator to see its long-run evolution.
U.S. Census Bureau: intercensal estimates 2000–2009, Vintage 2020 (2010–2019) and Vintage 2024 (2020–2024), July 1.
| Indicator | Value | Year and source |
|---|---|---|
| Population estimate | 122,546 | 2024 · U.S. Census Bureau |
| Population, 2010 Census | 109,299 | 2010 · U.S. Census Bureau |
| Population, 2000 | 96,178 | July 1, 2000 · Census intercensal |
| Change since 2000 | +27.4% | 2000–2024 · Census |
| International migration | +94 | 2024 · Census Vintage 2024 |
| Domestic migration | +625 | 2024 · Census Vintage 2024 |
| Birth rate | 9.2 per 1,000 | 2024 · calculated |
| Death rate | 8.0 per 1,000 | 2024 · calculated |
| Population rank in Montana | 3rd of 56 | 2024 · calculated |
| Per capita personal income | $74,223 | BEA, 2024 · official |
| Gross domestic product | $9.1 billion | BEA, current dollars, 2024 · official |
| Median household income | $75,598 | ACS 2020–2024 5-year · official |
| Poverty rate | 10.1% | ACS 2020–2024 5-year · official |
| Bachelor’s degree or higher | 47.4% | Age 25+, ACS 2020–2024 5-year · official |
| Foreign-born residents | 2.9% | ACS 2020–2024 5-year · official |
| Median home value | $472,100 | ACS 2020–2024 5-year · official |
| Median gross rent | $1,190/month | ACS 2020–2024 5-year · official |
| Median age | 37.1 years | ACS 2020–2024 5-year · official |
| Households | 52,679 | ACS 2020–2024 5-year · official |
| Owner-occupied homes | 58.8% | ACS 2020–2024 5-year · official |
Comparable indicators for Missoula County, Montana and the United States.
| Indicator | County | Montana | U.S. | Reference |
|---|---|---|---|---|
| Population change 2020–2024 | +3.9% | +4.9% | +2.6% | Census Vintage 2024 |
| Birth rate (per 1,000) | 9.2 | 9.9 | 10.6 | 2024 |
| Death rate (per 1,000) | 8.0 | 9.9 | 9.1 | 2024 |
| Net migration rate (per 1,000) | 5.9 | 5.2 | 8.2 | 2024 |
| Population density (/mi²) | 47.3 | 7.8 | 96.3 | 2024 |
| Per capita personal income | $74,223 | $69,240 | $73,204 | BEA, 2024 |
| Median household income | $75,598 | $72,509 | $80,734 | ACS 2020–2024 5-year |
| Poverty rate | 10.1% | 11.5% | 12.5% | ACS 2020–2024 5-year |
| Bachelor’s degree or higher | 47.4% | 35.2% | 35.7% | Age 25+, ACS 2020–2024 5-year |
| Foreign-born residents | 2.9% | 2.3% | 14.1% | ACS 2020–2024 5-year |
| Median home value | $472,100 | $375,800 | $332,700 | ACS 2020–2024 5-year |
| Median gross rent | $1,190/month | $1,081/month | $1,413/month | ACS 2020–2024 5-year |
| Median age | 37.1 years | 40.4 years | 38.9 years | ACS 2020–2024 5-year |
| Owner-occupied homes | 58.8% | 69.2% | 65.2% | ACS 2020–2024 5-year |
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With 122,546 residents in 2024, Missoula County ranks 3rd by population among Montana's 56 counties and is home to 10.8% of the state's residents.
Its population went from 96,178 in 2000 to 122,546 in 2024, a change of +27.4%, compared with +25.8% for Montana as a whole.
In the year to July 2024 the county recorded 1,133 births and 985 deaths, so births outnumbered deaths by 148.
Annual Census estimates since 2000 put the county's highest population in 2024, at 122,546.
Missoula County has about 47.3 residents per square mile of land, ranking 4th of 56 counties; Montana averages 7.8.
With a median household income of $75,598 (ACS 2020–2024 5-year), the county ranks 9th of 56 Montana counties; the state median is $72,509.
Its economy produced $9.1 billion of GDP in 2024 (BEA), 3rd largest among 56 Montana counties.
Real GDP grew 3.9% in 2024, adjusted for inflation (BEA, chained 2017 dollars).