Custer County, Montana
Located in Montana, Custer County has a population of 11,961 residents and a median age of 42.7 years, making it the #2,354 most populous county out of 3,222 nationwide. In terms of economic indicators, the county has a poverty rate of 11.3%. The median home value is $219,100, and the median household income is $70,605, which is 6% below the national median.
Demographics
Custer County has a population of 11,961, making it the #2,354 most populous county in the US. The median age is 42.7 years, which is 9.8% above the national median.
Population Trend
Rankings →Year-over-Year Population Growth
Age & Sex Distribution
Race & Ethnicity
Nativity
Geographic Mobility (Past Year)
Economy
The median household income in Custer County is $70,605, ranking #1,157 out of 3,222 counties — 6.0% below the national median. The poverty rate is 11.3% and unemployment stands at 3.4%.
Median Household Income Trend
Rankings →Income Distribution
Industry of Employment
Occupation
Housing
The median home value in Custer County is $219,100 (-22.3% vs national). Renters pay a median of $893/mo and the homeownership rate is 69.9%.
Median Home Value Trend
Rankings →Household Type
Education
In Custer County, 27.0% of adults age 25+ hold a bachelor's degree or higher, which is 19.8% below the national average, ranking #1,009 out of 3,222 counties.
Bachelor's Degree or Higher Trend
Rankings →Health & Wellbeing
Life expectancy in Custer County is 76.2 years. 15.6% of adults report poor or fair health and 11.7% lack health insurance. Data from County Health Rankings (2025).
Life Expectancy Trend
Substance Use
15.9% of adults in Custer County smoke , 35.8% are obese , and 26.2% report excessive drinking.
Adult Smoking Trend
Safety
The suicide rate is 17.1 per 100,000. Motor vehicle deaths occur at a rate of 13.4 per 100,000.
Suicide Rate Trend
Families & Children
13.4% of children in Custer County live in poverty . The teen birth rate is 20.1 per 1,000 females age 15–19.
Teen Birth Rate Trend
Civic & Transportation
Voter turnout in Custer County is 64.6%. The mean commute time is 14.5 min, which is 47.6% below the national average.
Voter Turnout Trend
Mean Commute Time Trend
Rankings →Elections
In the 2024 presidential election, Custer County voted Republican with a margin of 48.7%. The vote was 23.9% Dem / 72.6% Rep. Compared to 2020, the margin shifted 2.9 toward Republicans .
Vote Share Over Time
About Custer County, Montana
Custer County, Montana has a total population of 11,961, making it the 2,354th most populous county in the United States. The median age in Custer County is 42.7 years, which is 9.8% above the national median of 38.9 years.
The median household income in Custer County is $70,605, which ranks #1,157 of 3,222 counties nationwide. This is 6.0% below the national median of $75,149. The poverty rate is 11.3%, lower than the national rate of 12.6%. The unemployment rate stands at 3.4%.
The median home value in Custer County is $219,100, 22.3% below the national median. Renters in Custer County pay a median gross rent of $893 per month. The homeownership rate is 69.9%, compared to the national rate of 64.4%.
In Custer County, 27.0% of residents aged 25 and older hold a bachelor's degree or higher, 19.8% below the national average of 33.7%. Health insurance coverage stands at 92.3% of the population. The average commute time for workers is 14.5 min.
Custer County is a diverse community. The largest racial or ethnic group is White (non-Hispanic) at 89.0% of the population, followed by Two or More Races (5.1%) and Hispanic or Latino (3.4%).
All data for Custer County, Montana comes from the U.S. Census Bureau's American Community Survey (ACS) 5-Year Estimates. These figures are estimates based on survey sampling and are subject to margin of error. For the most detailed and up-to-date data, visit the Census Bureau's official data portal.