57621 can be classified socioeconomically as Lower Class class compared to other ZIP Codes in South Dakota. The majority race/ethnicity residing in 57621 is Native American. The majority race/ethnicity attending public schools in 57621 is Native American. The current unemployment level in 57621 is 2.2%.
| Population | 250 |
| Population Growth Rate | -24.14% |
| Population Density | 81 People per Square Mile |
| Total Households | 86 |
| Median Household Income (2021) | $23,438 |
| Current Unemployment Rate (May 2026) | 2.2% |
| Sales Tax Rate (2025) | 4.2% |
| Majority Race/Ethnicity | Native American - 99.34% |
| Public School Majority Race/Ethnicity | Native American - 100% |
57621 Race/Ethnicity Breakdown
| Race/Ethnicity | Total | Percentage |
|---|
| White | 2 | 0.66% |
| Black | 0 | 0% |
| Hispanic | 0 | 0% |
| Asian | 0 | 0% |
| Native American | 303 | 99.34% |
| Hawaiian/Pac. Islander | 0 | 0% |
57621 Public School Race/Ethnicity Breakdown
| Race/Ethnicity | Total | Percentage |
|---|
| White | 0 | 0% |
| Black | 0 | 0% |
| Hispanic | 0 | 0% |
| Asian | 0 | 0% |
| Native American | 25 | 100% |
| Hawaiian/Pac. Islander | 0 | 0% |
57621 Educational Attainment Levels
| Highest Education Level | Total | Percentage |
|---|
| Less Than 1 Year of College | 15 | 8.62% |
| Bachelor Degree | 22 | 12.64% |
| High School Diploma | 73 | 41.95% |
| No High School Diploma | 2 | 1.15% |
| GED or Alternate | 13 | 7.47% |
| 1 or More Years of College | 26 | 14.94% |
| Associates Degree | 21 | 12.07% |
| Masters Degree | 2 | 1.15% |
| Professional Degree | 0 | 0% |
| Doctorate Degree | 0 | 0% |
