Foster County, North Dakota Demographics 2026
Foster County, North Dakota has a population of 3,358, the 32nd most populous county in North Dakota. The median household income is $87,831 and the median home value is $167,500. The poverty rate is 8.8%.
Data vintage: U.S. Census Bureau ACS 2020–2024 5-Year Estimates · refreshed July 2026 · Methodology & source notes
Foster County Quick Facts
How Foster County 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 | 3,372 | 3,358 | -0.4% |
| Median household income | $83,412 | $87,831 | +5.3% |
| Median home value | $162,800 | $167,500 | +2.9% |
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: 32 | National average: 61
Education
Educational Attainment (Adults 25+)
Cities & Places in Foster County
| City | Population | Median Income | Poverty | Home Value |
|---|---|---|---|---|
| Carrington | 2,168 | $77,171 | 9.7% | $150,600 |
| McHenry | 66 | $2,499 | 37.9% | N/A |
| Glenfield | 63 | N/A | 3.2% | N/A |
| Grace City | 61 | $71,250 | 4.9% | $22,500 |
Explore North Dakota Rankings
Population Overview
Foster County is located in North Dakota with a total population of 3,358. It is the 32nd most populous county out of 53 in North Dakota. The county encompasses 4 Census-designated places.
Age Demographics
The median age in Foster County is 43.4 years. This is 21% higher than the state median of 35.9 years. 11.1% 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 Foster County is $87,831. This is 15% higher than the state median of $76,657. It is also 9% higher than the national median of $80,734. The poverty rate stands at 8.8%. This is 19% lower than the state poverty rate of 10.8%. The unemployment rate is 1.0%. This is 65% lower than the state rate of 2.8%. The median home value is $167,500. Housing costs are 33% lower than the state median of $249,900. With a home-value-to-income ratio of just 1.9x, Foster County is one of the most affordable housing markets in the area. 79.7% of occupied housing units are owner-occupied. This homeownership rate is 27% higher than the state average of 62.8%.
Race & Ethnicity
Foster County has a predominantly White (non-Hispanic) population, comprising 93.1% of all residents. Asian residents account for 1.8%. The Black or African American population (0.3%) is well below the state average of 3.3%. The Hispanic or Latino population (1.7%) is well below the state average of 4.7%.
Education
28.5% of residents aged 25 and older hold a bachelor's degree or higher. This is 13% lower than the state rate of 32.7%. Nationally, 35.7% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 93.2%.
Data Sources & Methodology
All figures for Foster County come from the U.S. Census Bureau's American Community Survey (ACS) 2020–2024 5-Year Estimates, with comparisons drawn against North Dakota and national averages from the same dataset. See our methodology page for how each metric is defined, or data.census.gov for official tables with margins of error.
Frequently Asked Questions
What is the population of Foster County, North Dakota?
Foster County has a population of 3,358, making it the 32nd most populous county in North Dakota.
What is the median income in Foster County?
The median household income in Foster County is $87,831 with a poverty rate of 8.8%.
How many cities are in Foster County, North Dakota?
Foster County contains 4 Census-designated places.