| Statistic | Selby | South Dakota | National |
| Population | 513 | 884,659 | 328,239,523 |
| Population density (sq mi) | 720 | 12 | 91 |
| Median age | 49.8 | 36.8 | 37.7 |
| Male/Female ratio | 1.3:1 | 1.0:1 | 1.0:1 |
| Married (15yrs & older) | 70% | 59% | 55% |
| Families w/ Kids under 18 | 29% | 44% | 43% |
| Speak English | 91% | 94% | 79% |
| Speak Spanish | 7% | 2% | 13% |
| Race | Selby | South Dakota | National |
| White | 85.96% | 84.77% | 73.35% |
| Black | 0.00% | 1.65% | 12.63% |
| Asian | 0.00% | 1.33% | 5.22% |
| American Indian | 3.51% | 8.72% | 0.82% |
| Native Hawaiian | 0.00% | 0.04% | 0.18% |
| Mixed race | 4.48% | 2.61% | 3.06% |
| Other race | 6.04% | 0.88% | 4.75% |
Here are the best places to live in South Dakota
These are the largest cities in South Dakota
These are the 10 cheapest cities in South Dakota
Safest Cities In The US