Foster County, North Dakota
Located in North Dakota, Foster County has a population of 3,358 residents and a median age of 43.4 years, making it the #3,012 most populous county out of 3,222 nationwide. In terms of economic indicators, the county has a poverty rate of 8.8%. The median home value is $167,500, and the median household income is $87,831, which is 17% above the national median.
Demographics
Foster County has a population of 3,358, making it the #3,012 most populous county in the US. The median age is 43.4 years, which is 11.6% 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 Foster County is $87,831, ranking #353 out of 3,222 counties — 16.9% above the national median. The poverty rate is 8.8% and unemployment stands at 1.0%.
Median Household Income Trend
Rankings →Income Distribution
Industry of Employment
Occupation
Housing
The median home value in Foster County is $167,500 (-40.6% vs national). Renters pay a median of $780/mo and the homeownership rate is 79.7%.
Median Home Value Trend
Rankings →Household Type
Education
In Foster County, 28.5% of adults age 25+ hold a bachelor's degree or higher, which is 15.5% below the national average, ranking #884 out of 3,222 counties.
Bachelor's Degree or Higher Trend
Rankings →Health & Wellbeing
Life expectancy in Foster County is 77.2 years. 14.3% of adults report poor or fair health and 7.9% lack health insurance. Data from County Health Rankings (2025).
Life Expectancy Trend
Substance Use
16.4% of adults in Foster County smoke , 39.9% are obese , and 24.2% report excessive drinking.
Adult Smoking Trend
Safety
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Families & Children
10.0% of children in Foster County live in poverty . The teen birth rate is 13.8 per 1,000 females age 15–19.
Teen Birth Rate Trend
Civic & Transportation
Voter turnout in Foster County is 70.8%. The mean commute time is 15.0 min, which is 45.7% below the national average.
Voter Turnout Trend
Mean Commute Time Trend
Rankings →Elections
In the 2024 presidential election, Foster County voted Republican with a margin of 58.6%. The vote was 19.8% Dem / 78.4% Rep. Compared to 2020, the margin shifted 3.0 toward Republicans .
Vote Share Over Time
About Foster County, North Dakota
Foster County, North Dakota has a total population of 3,358, making it the 3,012th most populous county in the United States. The median age in Foster County is 43.4 years, which is 11.6% above the national median of 38.9 years.
The median household income in Foster County is $87,831, which ranks #353 of 3,222 counties nationwide. This is 16.9% above the national median of $75,149. The poverty rate is 8.8%, lower than the national rate of 12.6%. The unemployment rate stands at 1.0%.
The median home value in Foster County is $167,500, 40.6% below the national median. Renters in Foster County pay a median gross rent of $780 per month. The homeownership rate is 79.7%, compared to the national rate of 64.4%.
In Foster County, 28.5% of residents aged 25 and older hold a bachelor's degree or higher, 15.5% below the national average of 33.7%. Health insurance coverage stands at 95.1% of the population. The average commute time for workers is 15.0 min.
Foster County is a diverse community. The largest racial or ethnic group is White (non-Hispanic) at 93.1% of the population, followed by Two or More Races (2.5%) and Asian (non-Hispanic) (1.8%).
All data for Foster County, North Dakota 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.