Custer County, Idaho
Located in Idaho, Custer County has a population of 4,470 residents and a median age of 60.0 years, making it the #2,936 most populous county out of 3,222 nationwide. In terms of economic indicators, the county has a poverty rate of 15.8%. The median home value is $381,700, and the median household income is $67,574, which is 10% below the national median.
Demographics
Custer County has a population of 4,470, making it the #2,936 most populous county in the US. The median age is 60.0 years, which is 54.2% 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 $67,574, ranking #1,377 out of 3,222 counties — 10.1% below the national median. The poverty rate is 15.8% and unemployment stands at 2.0%.
Median Household Income Trend
Rankings →Income Distribution
Industry of Employment
Occupation
Housing
The median home value in Custer County is $381,700 (+35.4% vs national). Renters pay a median of $691/mo and the homeownership rate is 76.8%.
Median Home Value Trend
Rankings →Household Type
Education
In Custer County, 29.3% of adults age 25+ hold a bachelor's degree or higher, which is 13.2% below the national average, ranking #822 out of 3,222 counties.
Bachelor's Degree or Higher Trend
Rankings →Health & Wellbeing
Life expectancy in Custer County is 78.7 years. 15.4% of adults report poor or fair health and 12.7% lack health insurance. Data from County Health Rankings (2025).
Life Expectancy Trend
Substance Use
13.5% of adults in Custer County smoke , 32.8% are obese , and 19.9% report excessive drinking.
Adult Smoking Trend
Safety
The suicide rate is 33.1 per 100,000. Motor vehicle deaths occur at a rate of 39.9 per 100,000.
Firearm Fatalities Trend
Families & Children
18.5% of children in Custer County live in poverty . The teen birth rate is 17.0 per 1,000 females age 15–19.
Child Poverty Trend
Civic & Transportation
Voter turnout in Custer County is 80.2%. The mean commute time is 19.7 min, which is 28.8% 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 53.3%. The vote was 22.1% Dem / 75.4% Rep. Compared to 2020, the margin shifted +1.0 toward Democrats .
Vote Share Over Time
About Custer County, Idaho
Custer County, Idaho has a total population of 4,470, making it the 2,936th most populous county in the United States. The median age in Custer County is 60.0 years, which is 54.2% above the national median of 38.9 years.
The median household income in Custer County is $67,574, which ranks #1,377 of 3,222 counties nationwide. This is 10.1% below the national median of $75,149. The poverty rate is 15.8%, higher than the national rate of 12.6%. The unemployment rate stands at 2.0%.
The median home value in Custer County is $381,700, 35.4% above the national median. Renters in Custer County pay a median gross rent of $691 per month. The homeownership rate is 76.8%, compared to the national rate of 64.4%.
In Custer County, 29.3% of residents aged 25 and older hold a bachelor's degree or higher, 13.2% below the national average of 33.7%. Health insurance coverage stands at 87.9% of the population. The average commute time for workers is 19.7 min.
Custer County is a diverse community. The largest racial or ethnic group is White (non-Hispanic) at 88.4% of the population, followed by Hispanic or Latino (4.5%) and Asian (non-Hispanic) (3.1%).
All data for Custer County, Idaho 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.