57642 can be classified socioeconomically as Lower Middle Class class compared to other ZIP Codes in South Dakota based on Median Household Income and Average Adjusted Gross Income. The majority race/ethnicity residing in 57642 is Native American. The majority race/ethnicity attending public schools in 57642 is Native American. The current unemployment level in 57642 is 2.2%.
| Population | 2,009 |
| Population Growth Rate | -1.42% |
| Population Density | 2 People per Square Mile |
| Total Households | 524 |
| Percentage High Income Households | 2.3% |
| Median Household Income (2021) | $48,977 |
| Average Adjusted Gross Income (2021) | $174,200 |
| Current Unemployment Rate (May 2026) | 2.2% |
| Sales Tax Rate (2025) | 6.2% |
| Majority Race/Ethnicity | Native American - 79.45% |
| Public School Majority Race/Ethnicity | Native American - 95.45% |
57642 Race/Ethnicity Breakdown
| Race/Ethnicity | Total | Percentage |
|---|
| White | 391 | 20.24% |
| Black | 3 | 0.16% |
| Hispanic | 3 | 0.16% |
| Asian | 0 | 0% |
| Native American | 1,535 | 79.45% |
| Hawaiian/Pac. Islander | 0 | 0% |
57642 Public School Race/Ethnicity Breakdown
| Race/Ethnicity | Total | Percentage |
|---|
| White | 8 | 1.76% |
| Black | 0 | 0% |
| Hispanic | 6 | 1.32% |
| Asian | 0 | 0% |
| Native American | 441 | 96.92% |
| Hawaiian/Pac. Islander | 0 | 0% |
57642 Educational Attainment Levels
| Highest Education Level | Total | Percentage |
|---|
| Less Than 1 Year of College | 51 | 6.48% |
| Bachelor Degree | 93 | 11.82% |
| High School Diploma | 167 | 21.22% |
| No High School Diploma | 5 | 0.64% |
| GED or Alternate | 60 | 7.62% |
| 1 or More Years of College | 196 | 24.9% |
| Associates Degree | 147 | 18.68% |
| Masters Degree | 48 | 6.1% |
| Professional Degree | 2 | 0.25% |
| Doctorate Degree | 18 | 2.29% |
