Population 75 · Census ACS 2020–24
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Population and households in ZIP 57421
Household size in ZIP 57421
| Period | ZIP 57421 | South Dakota | U.S. |
|---|---|---|---|
| 2006–10 | 2.32 | 2.51 | 2.68 |
| 2010–14 | 2.37 | 2.51 | 2.73 |
| 2015–19 | 2.61 | 2.50 | 2.71 |
| 2020–24 | 2.36 | 2.48 | 2.65 |
| Change | +0.04 | −0.03 | −0.03 |
Households in ZIP 57421 are small: just 2.36 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: 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 ZIP 57421
| Period | ZIP 57421 | South Dakota | U.S. |
|---|---|---|---|
| 2006–10 | 48.0 | 37.9 | 37.7 |
| 2010–14 | 45.1 | 38.3 | 38.6 |
| 2015–19 | 41.1 | 38.8 | 39.6 |
| 2020–24 | 48.8 | 38.9 | 40.1 |
| Change | +0.8 | +1.0 | +2.3 |
With a median age of 48.8, ZIP 57421 is noticeably older than the country as a whole (40.1), an age mix that tilts toward empty nesters and retirees.
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 ZIP 57421
| Period | ZIP 57421 | South Dakota | U.S. |
|---|---|---|---|
| 2006–10 | 6.0% | 10.8% | 12.3% |
| 2010–14 | 4.1% | 11.1% | 12.3% |
| 2015–19 | 4.0% | 10.9% | 11.6% |
| 2020–24 | 2.5% | 10.7% | 11.6% |
| Change | −3.5 pts | −0.1 pts | −0.6 pts |
Single-parent households are relatively rare in ZIP 57421: 2.5% of households, against 11.6% nationally. Since 2006–10, the single-parent share has fallen 3.5 points, but in a place this small, survey estimates can swing a lot from one release to the next.
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 ZIP 57421
Renters in ZIP 57421
| Period | ZIP 57421 | South Dakota | U.S. |
|---|---|---|---|
| 2006–10 | 23.3% | 31.1% | 33.3% |
| 2010–14 | 19.9% | 32.0% | 35.6% |
| 2015–19 | 14.3% | 32.0% | 36.0% |
| 2020–24 | 19.2% | 31.4% | 34.8% |
| Change | −4.2 pts | +0.3 pts | +1.5 pts |
Only 19.2% of households in ZIP 57421 rent their homes, far below the national share of 34.8%, so most residents are owners who tend to stay put. Among homeowners, 74.3% have no mortgage at all, well above the national share of 39.8%.
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 ZIP 57421
| Period | ZIP 57421 | South Dakota | U.S. |
|---|---|---|---|
| 2006–10 | 31.5% | 11.3% | 11.4% |
| 2010–14 | 35.6% | 10.7% | 11.4% |
| 2015–19 | 28.8% | 11.6% | 11.1% |
| 2020–24 | 25.8% | 10.3% | 9.6% |
| Change | −5.6 pts | −1.1 pts | −1.8 pts |
Vacancy is high in ZIP 57421: 25.8% 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.
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 ZIP 57421
| Period | ZIP 57421 | South Dakota | U.S. |
|---|---|---|---|
| 2006–10 | 1956 | 1972 | 1974 |
| 2010–14 | 1958 | 1974 | 1975 |
| 2015–19 | 1963 | 1977 | 1977 |
| 2020–24 | 1963 | 1981 | 1980 |
| Change | +7 | +9 | +6 |
The housing in ZIP 57421 is old by national standards: the median home dates to 1963, against 1980 for the U.S., so buyers will find more older houses, some of them due for updates.
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 ZIP 57421
| Period | ZIP 57421 | South Dakota | U.S. |
|---|---|---|---|
| 2006–10 | $411 | $631 | $965 |
| 2010–14 | $479 | $692 | $1,040 |
| 2015–19 | $687 | $798 | $1,213 |
| 2020–24 | $792 | $1,000 | $1,571 |
| Change | +$381 | +$369 | +$606 |
The median renter in ZIP 57421 pays $792 a month for rent and utilities, well below the national median of $1,571. Rent takes 14.3% of the typical renter's income, comfortably under the 30% mark often used to define affordable rent.
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 ZIP 57421
Bachelor's degrees in ZIP 57421
| Period | ZIP 57421 | South Dakota | U.S. |
|---|---|---|---|
| 2006–10 | 18.1% | 26.8% | 28.4% |
| 2010–14 | 22.2% | 27.8% | 29.6% |
| 2015–19 | 34.4% | 29.4% | 32.1% |
| 2020–24 | 23.9% | 32.5% | 35.6% |
| Change | +5.8 pts | +5.6 pts | +7.2 pts |
College degrees are relatively uncommon in ZIP 57421: 23.9% of adults 25 and older hold a bachelor's or higher, well below the national share of 35.6%.
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 ZIP 57421
| Period | ZIP 57421 | South Dakota | U.S. |
|---|---|---|---|
| 2006–10 | 84.0% | 89.9% | 84.9% |
| 2010–14 | 92.2% | 91.0% | 86.1% |
| 2015–19 | 92.9% | 91.8% | 87.7% |
| 2020–24 | 91.0% | 93.1% | 89.3% |
| Change | +7.0 pts | +3.2 pts | +4.3 pts |
High school completion in ZIP 57421 is a bit above the national rate: 91.0% of adults have a diploma or equivalent, against 89.3%. Still, the rate is lower than in South Dakota as a whole (93.1%).
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 ZIP 57421
| Period | ZIP 57421 | South Dakota | U.S. |
|---|---|---|---|
| 2006–10 | 3.3% | 4.9% | 8.1% |
| 2010–14 | 0.1% | 4.9% | 9.4% |
| 2015–19 | 0.8% | 3.6% | 5.6% |
| 2020–24 | 0.5% | 3.1% | 5.4% |
| Change | −2.8 pts | −1.7 pts | −2.7 pts |
Unemployment in ZIP 57421 has been low: just 0.5% 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).
ZIP 57421 compared with nearby ZIP codes
| ZIP code | Household size | Median age | Single parents | Renters | Vacant homes | Median year built | Median rent | Bachelor's degree | High school diploma | Unemployment |
|---|---|---|---|---|---|---|---|---|---|---|
| ZIP 57421 | 2.36 | 48.8 | 2.5% | 19.2% | 25.8% | 1963 | $792 | 23.9% | 91.0% | 0.5% |
| ZIP 57432 | 2.50 | 36.9 | 6.0% | 13.3% | 19.8% | 1954 | $1,382 | 20.4% | 95.2% | 1.3% |
| ZIP 57430 | 2.44 | 42.7 | 8.5% | 18.1% | 27.3% | 1965 | $796 | 26.4% | 93.8% | 0.2% |
| ZIP 57454 | 2.34 | 49.4 | 2.9% | 19.1% | 25.7% | 1962 | $791 | 23.3% | 91.3% | 0.7% |
| ZIP 57449 | 2.41 | 43.1 | 5.3% | 29.5% | 36.6% | 1959 | $1,078 | 14.3% | 92.9% | 0.2% |
| ZIP 57446 | 2.46 | 43.3 | 5.5% | 27.1% | 35.9% | 1963 | $939 | 17.0% | 92.5% | 0.2% |
| ZIP 57433 | 2.52 | 36.2 | 7.9% | 6.6% | 14.7% | 1961 | $1,447 | 19.3% | 96.2% | 3.7% |
| ZIP 57247 | 2.73 | 42.4 | 3.7% | 21.5% | 37.2% | 1971 | $767 | 24.6% | 91.2% | 0.5% |
| ZIP 57426 | 2.38 | 47.6 | 8.4% | 7.9% | 13.4% | 1985 | $947 | 18.9% | 93.6% | 7.8% |
| ZIP 57232 | 2.71 | 42.8 | 3.6% | 21.4% | 36.5% | 1971 | $769 | 24.6% | 91.2% | 0.5% |
| ZIP 57441 | 2.68 | 40.4 | 7.1% | 11.3% | 24.8% | 1975 | $706 | 27.3% | 92.8% | 1.3% |
All figures 2020–24.
Zip codes with similar populations: 81237, CO · 56731, MN · 57061, SD · 57346, SD · 57364, SD · 58311, ND · 58313, ND · 58325, ND · 79353, TX · 79519, TX
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 ZIP 57421. 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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