Custer County, SD Demographics

Population 8,892 · Census ACS 2020–24

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Median age by neighborhoodHistory and comparison ↓︎
Custer County, SD map of median age by neighborhood
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Population and households in Custer County

Household size in Custer County

Household size, people per household
PeriodCuster CountySouth DakotaU.S.
2006–102.162.512.68
2010–142.182.512.73
2015–192.162.502.71
2020–241.952.482.65
Change−0.21−0.03−0.03
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Households in Custer County are small: just 1.95 people on average, compared with 2.65 nationally. That is typical of places where many people live alone or as couples, and fewer have children at home. Household size has dropped from 2.16 in 2006–10, a much bigger shift than nationally. Only one other South Dakota county has smaller households.

Household size: the average number of people living in each occupied home. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B25010).

Median age in Custer County

Median age, years
PeriodCuster CountySouth DakotaU.S.
2006–1049.737.937.7
2010–1450.938.338.6
2015–1955.038.839.6
2020–2456.738.940.1
Change+7.1+1.0+2.3
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Custer County skews older: half of its residents are older than 56.7, well above the national median of 40.1. That usually means more empty nesters and retirees, and fewer young families. Since 2006–10, the median age has climbed from 49.7, a much bigger shift than nationally. No other South Dakota county is older.

Median age: the age that splits residents into two equal halves. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B01002).

Single-parent households in Custer County

Single-parent households, % of households
PeriodCuster CountySouth DakotaU.S.
2006–105.9%10.8%12.3%
2010–145.3%11.1%12.3%
2015–198.2%10.9%11.6%
2020–245.7%10.7%11.6%
Change−0.2 pts−0.1 pts−0.6 pts
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Single parents head only 5.7% of households in Custer County, well below the national share of 11.6%. Compared with other South Dakota counties, Custer County has a lower share of single-parent households than most.

Single-parent households: households where one adult with no spouse present lives with children under 18. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B11003).

Housing in Custer County

Renters in Custer County

Renters, % of occupied homes
PeriodCuster CountySouth DakotaU.S.
2006–1021.6%31.1%33.3%
2010–1418.7%32.0%35.6%
2015–1916.0%32.0%36.0%
2020–2414.4%31.4%34.8%
Change−7.2 pts+0.3 pts+1.5 pts
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Custer County is overwhelmingly a place of homeowners: only 14.4% of households rent, far below the national share of 34.8%. Owner-heavy areas like this tend to see less turnover. The renter share is down 7.2 points from 2006–10, even as the national share rose. Only one other South Dakota county has a lower share of renters.

Renters: occupied homes that are rented rather than owned. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B25003).

Vacant homes in Custer County

Vacant homes, % of all homes
PeriodCuster CountySouth DakotaU.S.
2006–1019.1%11.3%11.4%
2010–1422.3%10.7%11.4%
2015–1925.1%11.6%11.1%
2020–2416.3%10.3%9.6%
Change−2.8 pts−1.1 pts−1.8 pts
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Vacancy is high in Custer County: 16.3% of homes are empty, far above the national rate of 9.6%. In resort and lake areas that usually means seasonal and vacation homes; elsewhere it can point to weak demand. Vacancy is down 2.8 points from 2006–10, as it has nationally.

Vacant homes: homes with no one living in them, including vacation homes and homes for sale or rent. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B25002).

Age of homes in Custer County

Age of homes, median year built
PeriodCuster CountySouth DakotaU.S.
2006–10197819721974
2010–14198319741975
2015–19198619771977
2020–24199319811980
Change+14+9+6
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Custer County has newer housing than the country as a whole: the median home was built in 1993, versus 1980 nationally. The median year built has moved up from 1978 in 2006–10, a sign of steady new building. Newer construction is concentrated in the northeast, while the northwest has the oldest housing. Only one other South Dakota county has newer homes.

Age of homes: the year that splits the housing stock into older and newer halves. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B25035).

Rent in Custer County

Rent, per month
PeriodCuster CountySouth DakotaU.S.
2006–10$713$631$965
2010–14$799$692$1,040
2015–19$825$798$1,213
2020–24$1,227$1,000$1,571
Change+$514+$369+$606
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Rent in Custer County runs $1,227 a month at the median, utilities included, well below the U.S. median of $1,571. Even so, rents here are higher than in South Dakota as a whole ($1,000). Rents are up $514 a month from 2006–10, a 72% jump, faster than rents rose nationally. Only one other South Dakota county has higher rents.

Rent: monthly rent plus the utilities renters pay themselves. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B25064).

Education in Custer County

Bachelor's degrees in Custer County

Bachelor's degrees, % of adults 25+
PeriodCuster CountySouth DakotaU.S.
2006–1028.3%26.8%28.4%
2010–1426.7%27.8%29.6%
2015–1923.8%29.4%32.1%
2020–2431.7%32.5%35.6%
Change+3.4 pts+5.6 pts+7.2 pts
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Nearly a third of adults 25 and older in Custer County (31.7%) have a bachelor's degree or higher, a little below the national share of 35.6%. That is in line with the rest of South Dakota. The share with a degree is up 3.4 points from 2006–10, as it has nationally.

Bachelor's degrees: adults 25 and older with a bachelor's degree or higher. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B15003).

High school graduates in Custer County

High school graduates, % of adults 25+
PeriodCuster CountySouth DakotaU.S.
2006–1092.2%89.9%84.9%
2010–1493.9%91.0%86.1%
2015–1993.6%91.8%87.7%
2020–2495.2%93.1%89.3%
Change+3.0 pts+3.2 pts+4.3 pts
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High school completion is high in Custer County: 95.2% of adults 25 and older have a diploma or equivalent, well above the national rate of 89.3%. The share with a diploma is up 3.0 points from 2006–10, mirroring the country. Custer County has a higher share of high school graduates than at least four in five South Dakota counties.

High school graduates: adults 25 and older with a high school diploma, GED or more. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B15003).

Jobs in Custer County

Unemployment, % of the labor force
PeriodCuster CountySouth DakotaU.S.
2006–102.4%4.9%8.1%
2010–144.9%4.9%9.4%
2015–193.5%3.6%5.6%
2020–242.1%3.1%5.4%
Change−0.3 pts−1.7 pts−2.7 pts
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The job market in Custer County has been strong: just 2.1% of the labor force was out of work and looking, well below the national rate of 5.4%. Each figure pools five years of surveys (2020–24), so it describes that whole stretch rather than today's job market.

Unemployment: people looking for work as a share of everyone working or looking. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B23025).

Custer County compared with nearby counties

CountyHousehold sizeMedian ageSingle parentsRentersVacant homesMedian year builtMedian rentBachelor's degreeHigh school diplomaUnemployment
Custer County1.9556.75.7%14.4%16.3%1993$1,22731.7%95.2%2.1%
Jackson County3.4834.827.1%32.7%21.1%1982$48014.0%90.3%8.1%
Jones County2.9433.912.3%23.7%28.6%1973$54327.4%93.2%2.1%
Brule County2.5841.810.0%23.6%15.6%1969$90229.2%90.8%1.7%
Hot Springs County2.2043.17.8%27.3%12.5%1974$1,08126.5%95.2%3.0%
Aurora County2.4141.28.3%27.3%15.4%1962$77221.7%92.0%1.2%
Davison County2.2241.710.0%38.5%9.2%1971$83622.3%91.0%0.9%
Hanson County3.0237.84.2%10.6%12.1%1959$84822.7%93.3%1.8%
McCook County2.5139.46.4%20.5%11.5%1968$1,02130.3%94.5%1.9%
Rock County2.3541.86.9%23.4%5.8%1959$83926.5%93.2%2.6%
Teton County2.9440.06.3%19.2%28.5%2000$1,44849.3%92.6%1.0%

All figures 2020–24.

Counties with similar populations: Amite County, MS · Avery County, NC · Benzie County, MI · Bertie County, NC · Wetzel County, WV · Wayne County, IL · Bosque County, TX · Andrew County, MO · Bledsoe County, TN · Amelia County, VA

About these numbers

Every figure on this page is a BestNeighborhood calculation from the Census Bureau's American Community Survey (ACS), built up from the Census block groups that make up Custer County. Each ACS 5-year release pools five years of responses; this page shows the last 15 releases, 2006–10 through 2020–24. Neighboring releases share four of their five years, so they move gradually and small changes between them are within the survey's margin of error; in small places the lines can jump from one release to the next for the same reason. The maps show the same measures for each neighborhood, ranked against the whole country.

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