| Statistic | Killdeer | North Dakota | National |
| Population | 820 | 762,062 | 328,239,523 |
| Population density (sq mi) | 443 | 11 | 91 |
| Median age | 42.9 | 35.2 | 37.7 |
| Male/Female ratio | 1.2:1 | 1.1:1 | 1.0:1 |
| Married (15yrs & older) | 71% | 58% | 55% |
| Families w/ Kids under 18 | 55% | 44% | 43% |
| Speak English | 80% | 94% | 79% |
| Speak Spanish | 7% | 2% | 13% |


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| Race | Killdeer | North Dakota | National |
| White | 80.85% | 88.26% | 73.35% |
| Black | 4.51% | 2.01% | 12.63% |
| Asian | 5.00% | 1.26% | 5.22% |
| American Indian | 4.02% | 5.21% | 0.82% |
| Native Hawaiian | 0.00% | 0.05% | 0.18% |
| Mixed race | 5.12% | 2.44% | 3.06% |
| Other race | 0.49% | 0.77% | 4.75% |