What is the population of Foster County?

Foster County has 3,372 residents on Census ACS 2019-2023 ACS 5-year estimates.

What is the median household income in Foster County?

Median household income in Foster County is $83,412 a year, 6.2% above the national figure of $78,538.

How much does it cost to rent or buy in Foster County?

Median gross rent is $756 a month and the median home value is $162,800, so rent absorbs about 10.9% of median household income.

Is Foster County affordable compared with the rest of the US?

Homes cost about 2× the local median income here versus roughly 3.9× nationally, so Foster County is more affordable to buy in than the typical US market, and rent takes 10.9% of median income against the 30% cost-burden line.

Historic small-town main street building, illustrating the US counties directory

North Dakota · FIPS 38031

Foster ZIP codes — Foster County, North Dakota

Quick answer

Foster County is home to 3,372 residents with a median household income of $83,412 and a median home value of $162,800. 77.4% of households own their home and 9.1% of residents live below the poverty line. Looking for a Foster ZIP code? 3 ZIP code areas fall inside Foster County, North Dakota, listed in full below.

Population: 3,372Foster County residents
Median household income: $83,412Past 12 months, inflation adjusted
Median home value: $162,800Owner-occupied units
Median gross rent: $756Rent plus utilities, monthly
Median age: 43.3 yrsAll residents
Homeownership rate: 77.4%Owner-occupied households

Foster County, ND in context

How this area compares with national benchmarks.

Foster County is a small town in North Dakota, with 3,372 residents counted in the Census American Community Survey 2019-2023 ACS 5-year estimates. The median age here is 43.3 years against 39.1 nationally, a slightly older profile than the country as a whole. At this population the ACS sample is small, so the margin of error around every dollar figure below is wide — treat the numbers as a band, not a point, and expect them to move between annual releases without the place itself changing.

Households in Foster County earn a median of $83,412 a year, 6.2% above the national figure of $78,538. Median household income counts every pre-tax dollar arriving at an address — wages, self-employment, Social Security, pensions, interest and public assistance — for everyone living there, so multi-earner households pull the figure up even where individual pay is modest. Poverty reaches 9.1% of residents here, below the 12.4% national rate.

The typical owner-occupied home in Foster County is valued at $162,800, 46.3% below the national figure, while median gross rent runs $756 a month, 46.2% below the national figure, or roughly $9,072 across a full year. A household on the local median income would put about 10.9% of gross pay toward that rent against the federal 30% cost-burden threshold, so renting here is cheap relative to what people here earn. The home-price-to-income ratio works out to 2×, against roughly 3.9× nationally, so purchase prices are unusually low against local pay, the pattern in places where supply is plentiful and wage growth has been flat. 77.4% of occupied homes are owner-occupied versus 65% nationally, so the market leans toward owners. Gross rent folds in the utilities a tenant pays separately, so it is closer to the real monthly outlay than a headline rent figure.

All values below were released by the Census for this exact geography, with no gap-filling on our side. Small-area estimates still carry wider margins of error than state or national figures, so check the linked ACS tables before relying on them for lending, appraisal or legal work.

ZIP codes in Foster County

ZIP code tabulation areas whose land area falls mostly in Foster County.

How to read this page

What these estimates cover.

Figures are five-year rolling averages from the American Community Survey, not single-year counts, so they describe conditions across 2019-2023 ACS 5-year rather than a single date. Median home value covers owner-occupied units as valued by their owners, and median gross rent includes utilities the renter pays. Small counties carry wide margins of error; treat single-dollar differences between neighbouring counties as noise.

Source: US Census Bureau, ACS 2019-2023 5-year estimates · rates as published for 2019-2023 ACS 5-year

Cities and towns in North Dakota

Largest Census places in North Dakota by population.

Nearby counties

Other counties in North Dakota.

Frequently asked questions

Common questions about this area.

What is the population of Foster County?: Foster County has 3,372 residents on Census ACS 2019-2023 ACS 5-year estimates.
What is the median household income in Foster County?: Median household income in Foster County is $83,412 a year, 6.2% above the national figure of $78,538.
How much does it cost to rent or buy in Foster County?: Median gross rent is $756 a month and the median home value is $162,800, so rent absorbs about 10.9% of median household income.
Is Foster County affordable compared with the rest of the US?: Homes cost about 2× the local median income here versus roughly 3.9× nationally, so Foster County is more affordable to buy in than the typical US market, and rent takes 10.9% of median income against the 30% cost-burden line.
How current is this Foster County data?: All figures come from the US Census Bureau American Community Survey 2019-2023 ACS 5-year five-year estimates. At this population the ACS sample is small, so the margin of error around every dollar figure below is wide — treat the numbers as a band, not a point, and expect them to move between annual releases without the place itself changing.