ZIP 57621 vs ZIP 57631
A side-by-side comparison of ZIP Code 57621 and ZIP Code 57631: population, income, housing, and more.
ZIP 57621 and ZIP 57631 are ZIP Code areas in South Dakota. This page compares them across population, income, housing, education, commuting, and how each has changed since 2019.
ZIP 57631 has the higher population (365 vs 285 in ZIP 57621). ZIP 57631 has the higher median household income ($56,250 vs $32,614 in ZIP 57621). Since 2019, ZIP 57631's population has grown faster (-8.3% vs -26.0%).
Population, income & housing
| ZIP 57621 | ZIP 57631 | |
|---|---|---|
| Population | 285 | 365 |
| Median age | 21.1 yrs | 60.5 yrs |
| Median household income | $32,614 | $56,250 |
| Median home value | — | $106,700 |
| Median gross rent | $575 | — |
| Housing units | 66 | 329 |
| Homeownership rate | 31.6% | 90.4% |
| Bachelor's degree or higher | 7.8% | 20.9% |
| Unemployment rate | 45.1% | 19.8% |
Trends (ACS 5-year, 2019–2023)
| ZIP 57621 | ZIP 57631 | |
|---|---|---|
| Population | 385 → 285 (-26.0%) | 398 → 365 (-8.3%) |
| Median household income | $26,964 → $32,614 (+21.0%) | $68,125 → $56,250 (-17.4%) |
| Median home value | — | $125,800 → $106,700 (-15.2%) |
| Median gross rent | $531 → $575 (+8.3%) | — |
ZIP 57621
385285
$26,964$32,614
$531$575
ZIP 57631
398365
$68,125$56,250
$125,800$106,700
Age & race/ethnicity
Age distribution (share)
| ZIP 57621 | ZIP 57631 | |
|---|---|---|
| Under 5 | 16.1% | 1.4% |
| 5 to 17 | 26.7% | 3.6% |
| 18 to 24 | 11.9% | 17.8% |
| 25 to 34 | 9.8% | 1.6% |
| 35 to 44 | 12.6% | 4.1% |
| 45 to 54 | 12.6% | 18.1% |
| 55 to 64 | 5.6% | 12.6% |
| 65 to 74 | 3.5% | 29.9% |
| 75 and over | 1.1% | 11.0% |
Race & ethnicity (share)
| ZIP 57621 | ZIP 57631 | |
|---|---|---|
| White (non-Hispanic) | 0.7% | 95.6% |
| Black or African American | 0.0% | 0.0% |
| American Indian & Alaska Native | 99.3% | 0.0% |
| Asian | 0.0% | 0.0% |
| Native Hawaiian & Pacific Islander | 0.0% | 0.0% |
| Some other race | 0.0% | 1.1% |
| Two or more races | 0.0% | 3.3% |
| Hispanic or Latino | 0.0% | 0.0% |
Educational attainment (age 25+)
Share of adults 25+
| ZIP 57621 | ZIP 57631 | |
|---|---|---|
| No high school diploma | 21.7% | 2.5% |
| High school graduate | 57.4% | 42.2% |
| Some college or associate's | 13.2% | 34.4% |
| Bachelor's degree | 6.2% | 10.6% |
| Graduate or professional degree | 1.6% | 10.3% |
Commute to work
How workers get to work (share)
| ZIP 57621 | ZIP 57631 | |
|---|---|---|
| Drove alone | 46.2% | 70.3% |
| Carpooled | 7.7% | 2.6% |
| Public transit | 0.0% | 0.0% |
| Walked | 15.4% | 3.2% |
| Bicycle | 0.0% | 0.0% |
| Worked from home | 26.9% | 23.9% |
| Other means | 3.8% | 0.0% |
Housing
Units in structure (share)
| ZIP 57621 | ZIP 57631 | |
|---|---|---|
| 1-unit, detached | 77.3% | 64.4% |
| 1-unit, attached | 0.0% | 0.0% |
| 2 to 4 units | 0.0% | 0.0% |
| 5 to 19 units | 0.0% | 0.0% |
| 20 or more units | 0.0% | 0.0% |
| Mobile home & other | 22.7% | 35.6% |
Poverty & households
| ZIP 57621 | ZIP 57631 | |
|---|---|---|
| Poverty rate | 65.0% | 4.4% |
| Average household size | 5.00 | 1.75 |
| Mean commute (minutes) | 24 | 14 |
| Median year structure built | 1985 | 1976 |