Eureka, Montana Demographics & Population 2026
During the 2020–2024 ACS period, Eureka, Montana had a total population of 1,840, the 62nd largest town in Montana, with a median household income of $38,750, which is 47% lower than the state average. The poverty rate is 31.3%.
Data vintage: U.S. Census Bureau ACS 2020–2024 5-Year Estimates · refreshed July 2026 · Methodology & source notes
Key Takeaways
- Household income is 47% below the state average, indicating significant economic challenges.
- More than 1 in 4 residents live below the poverty line (31.3%), well above the national average of 12.4%.
- Only 6.8% of adults have a bachelor's degree, well below the national average of 35.7%.
Eureka Quick Facts
How Eureka 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 | 2,009 | 1,840 | -8.4% |
| Median household income | $43,750 | $38,750 | -11.4% |
| Median home value | $172,300 | $172,000 | -0.2% |
How Eureka 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+)
Eureka Rankings in Montana
Explore Montana Rankings
Other Cities in Lincoln County
| City | Population | Median Income | Poverty | Home Value |
|---|---|---|---|---|
| Libby | 3,042 | $34,143 | 24.0% | $257,400 |
| White Haven | 978 | $41,154 | 25.2% | $205,300 |
| Troy | 871 | $32,250 | 39.8% | $257,600 |
| Pioneer Junction | 798 | $59,107 | 2.5% | $321,600 |
| Trego | 692 | $108,750 | 3.9% | $328,800 |
| West Kootenai | 494 | $93,869 | 0.0% | $270,000 |
| Fortine | 351 | $66,402 | 18.8% | $325,900 |
| Yaak | 293 | $60,000 | 19.6% | $380,800 |
| Bull Lake | 247 | N/A | 0.0% | $592,100 |
| Happys Inn | 229 | $40,221 | 18.3% | $435,000 |
Cities Similar to Eureka
These cities in the same state have comparable population and economic profiles.
| City | Population | Median Income | Home Value | Bachelor's+ | Poverty |
|---|---|---|---|---|---|
| Forsyth | 1,728 | $39,744 | $208,400 | 14.5% | 14.1% |
| Ronan | 2,001 | $42,298 | $225,500 | 20.0% | 21.6% |
| Pablo | 1,632 | $36,400 | $256,700 | 8.9% | 34.5% |
| South Browning | 1,538 | N/A | $73,000 | 9.3% | 42.2% |
| Lame Deer | 1,872 | $23,700 | $111,100 | 10.8% | 55.9% |
Population Overview
Eureka is a small community located in Montana, within Lincoln County. The total population is 1,840. It ranks as the 62nd most populous out of 475 Census-designated places in Montana.
Age Demographics
The median age in Eureka is 42.4 years. This is 5% higher than the state median of 40.4 years. With 29.6% of the population under 18, Eureka has a notably young demographic profile, suggesting a family-oriented community. 10.7% of residents are 75 or older, suggesting a significant retirement-age population with implications for healthcare services and senior housing.
Economy, Income & Housing
The median household income in Eureka is $38,750. This is 47% lower than the state median of $72,509. It is also 52% lower than the national median of $80,734. The poverty rate stands at 31.3%. This is 172% higher than the state poverty rate of 11.5%. With more than one in five residents living below the poverty line, economic hardship is a significant challenge for the community. The unemployment rate is 4.2%. This is 16% higher than the state rate of 3.6%. The median home value is $172,000. Housing costs are 54% lower than the state median of $375,800. The home-value-to-income ratio is 4.4x. 78.5% of occupied housing units are owner-occupied. This homeownership rate is 14% higher than the state average of 69.2%.
Race & Ethnicity
Eureka has a predominantly White (non-Hispanic) population, comprising 89.1% of all residents. Hispanic or Latino residents account for 2.9%.
Education
6.8% of residents aged 25 and older hold a bachelor's degree or higher. This is 81% 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 87.1%.
Data Sources & Methodology
All demographic data for Eureka, 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 Eureka, Montana?
Eureka, Montana has a population of 1,840 according to the most recent U.S. Census ACS 5-Year Estimates.
What is the median household income in Eureka, MT?
The median household income in Eureka is $38,750, which is 52% lower than the national median of $80,734.
What is the poverty rate in Eureka, MT?
The poverty rate in Eureka is 31.3%. This means approximately 566 residents live below the federal poverty line.
What is the racial makeup of Eureka, Montana?
Eureka's population is 89.1% White, 0.0% Black, 2.9% Hispanic/Latino, and 0.0% Asian.
What is the median home value in Eureka, MT?
The median home value in Eureka is $172,000. The home-value-to-income ratio is 4.4x.
How educated is Eureka, Montana?
6.8% of adults (25+) in Eureka hold a bachelor's degree or higher, and 1.8% hold a graduate or professional degree.