Boulder, Montana Demographics & Population 2026
During the 2020–2024 ACS period, Boulder, Montana had a total population of 1,284, the 79th largest city in Montana, with a median household income of $72,500, which is about the same as the state average. The poverty rate is 3.8%.
Data vintage: U.S. Census Bureau ACS 2020–2024 5-Year Estimates · refreshed July 2026 · Methodology & source notes
Key Takeaways
- An exceptionally low poverty rate of 3.8% — among the lowest in Montana.
Boulder Quick Facts
How Boulder Changed
Change from the 2019–2023 ACS period to 2020–2024. These are rolling five-year estimates, not year-over-year measurements.
| Metric | 2019–2023 | 2020–2024 | Change |
|---|---|---|---|
| Population | 1,326 | 1,284 | -3.2% |
| Median household income | $61,250 | $72,500 | +18.4% |
| Median home value | $194,800 | $212,300 | +9.0% |
How Boulder Compares
Median Household Income
Median Home Value
Economy & Housing
Household Income Distribution
Detailed income brackets
Employment
Housing Overview
People & Demographics
Age Distribution
Race & Ethnicity
Diversity Index
A less diverse community where one racial or ethnic group represents a large majority.
State average: 29 | National average: 61
Education
Educational Attainment (Adults 25+)
Boulder Rankings in Montana
Explore Montana Rankings
Other Cities in Jefferson County
| City | Population | Median Income | Poverty | Home Value |
|---|---|---|---|---|
| Montana City | 3,092 | $129,755 | 1.8% | $571,200 |
| Clancy | 1,874 | $125,000 | 4.8% | $469,300 |
| Whitehall | 1,156 | $44,844 | 20.6% | $194,100 |
| South Hills | 620 | $168,235 | 1.0% | $703,800 |
| Jefferson City | 533 | $125,682 | 0.0% | N/A |
| Basin | 352 | $46,597 | 14.4% | $227,700 |
| Rader Creek | 310 | $100,691 | 4.8% | $463,200 |
| Elkhorn | 34 | N/A | 0.0% | N/A |
| Cardwell | 30 | N/A | 13.3% | N/A |
Cities Similar to Boulder
These cities in the same state have comparable population and economic profiles.
| City | Population | Median Income | Home Value | Bachelor's+ | Poverty |
|---|---|---|---|---|---|
| Corvallis | 1,227 | $78,103 | $249,800 | 13.3% | 12.9% |
| Somers | 1,280 | $56,917 | $465,400 | 32.0% | 8.0% |
| Chinook | 1,353 | $61,750 | $214,700 | 35.8% | 8.4% |
| Helena West Side | 1,417 | $66,921 | $402,300 | 44.8% | 5.9% |
| Fort Benton | 1,474 | $67,188 | $247,600 | 30.2% | 3.0% |
Population Overview
Boulder is a small community located in Montana, within Jefferson County. The total population is 1,284. It ranks as the 79th most populous out of 475 Census-designated places in Montana.
Age Demographics
The median age in Boulder is 41.4 years. This is 2% higher than the state median of 40.4 years.
Economy, Income & Housing
The median household income in Boulder is $72,500. This is about the same as the state median of $72,509. It is also 10% lower than the national median of $80,734. The poverty rate stands at 3.8%. This is 67% lower than the state poverty rate of 11.5%. This exceptionally low poverty rate indicates strong economic prosperity across the community. The unemployment rate is 6.9%. This is 91% higher than the state rate of 3.6%. The median home value is $212,300. Housing costs are 44% lower than the state median of $375,800. With a home-value-to-income ratio of just 2.9x, Boulder is one of the most affordable housing markets in the area. 73.3% of occupied housing units are owner-occupied. This homeownership rate is 6% higher than the state average of 69.2%.
Race & Ethnicity
Boulder has a predominantly White (non-Hispanic) population, comprising 89.9% of all residents. Hispanic or Latino residents account for 2.8%.
Education
22.1% of residents aged 25 and older hold a bachelor's degree or higher. This is 37% lower than the state rate of 35.2%. Nationally, 35.7% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 90.0%.
Data Sources & Methodology
All demographic data for Boulder, Montana is sourced from the U.S. Census Bureau's American Community Survey (ACS) 2020–2024 5-Year Estimates. The ACS collects data from approximately 3.5 million households annually and pools five years of responses so that even small communities can be measured, though the margin of error widens as the population falls. Comparisons are made against Montana state averages and national averages calculated from the same dataset. Rankings reflect the city's position among all 475 Census-designated places in Montana. Read more about how these figures are produced on our methodology page, or visit data.census.gov for official data.
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Frequently Asked Questions
What is the population of Boulder, Montana?
Boulder, Montana has a population of 1,284 according to the most recent U.S. Census ACS 5-Year Estimates.
What is the median household income in Boulder, MT?
The median household income in Boulder is $72,500, which is 10% lower than the national median of $80,734.
What is the poverty rate in Boulder, MT?
The poverty rate in Boulder is 3.8%. This means approximately 47 residents live below the federal poverty line.
What is the racial makeup of Boulder, Montana?
Boulder's population is 89.9% White, 0.0% Black, 2.8% Hispanic/Latino, and 0.0% Asian.
What is the median home value in Boulder, MT?
The median home value in Boulder is $212,300. The home-value-to-income ratio is 2.9x.
How educated is Boulder, Montana?
22.1% of adults (25+) in Boulder hold a bachelor's degree or higher, and 12.5% hold a graduate or professional degree.