| | Beulah, ND | Killdeer, ND | United States |
| Population | 3,070 | 715 | 329,725,481 |
| Female Population | 51.0% | 43.8% | 50.5% |
| Male Population | 49.0% | 56.2% | 49.5% |
| Median Age | 40.2 | 45.5 | 38.4 |
| space3 | | | |
| Population - 2010 | 3,122 | 750 | 309,327,143 |
| Population - 2000 | 3,152 | 713 | 285,036,114 |
| Population - 1990 | 3,363 | 722 | 251,960,433 |
| Pop. 2000 to Now | -0.8% | 62.0% | 15.6% |
| Pop. 1990 to Now | -7.0% | 60.0% | 30.8% |
| space4 | | | |
| Population Density | 1,292.1 | 784.0 | 93.4 |
| Land Area | 2.4 | 0.9 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Beulah, ND | Killdeer, ND | United States |
| Age 0 to 4 | 8.1% | 5.6% | 5.9% |
| Age 5 to 9 | 4.0% | 9.1% | 6.1% |
| Age 10 to 14 | 4.7% | 4.8% | 6.6% |
| Age 15 to 17 | 4.9% | 2.8% | 3.9% |
| Age 18 to 20 | 4.9% | 0.4% | 4.0% |
| Age 21 to 24 | 6.6% | 0.7% | 5.2% |
| Age 25 to 34 | 10.2% | 12.0% | 13.8% |
| Age 35 to 44 | 11.0% | 14.1% | 12.9% |
| Age 45 to 54 | 11.4% | 9.1% | 12.6% |
| Age 55 to 59 | 9.9% | 4.2% | 6.7% |
| Age 60 to 64 | 6.7% | 15.0% | 6.3% |
| Age 65 to 74 | 8.9% | 9.9% | 9.6% |
| Age 75 to 84 | 4.4% | 7.7% | 4.5% |
| Age 85 and over | 4.6% | 4.6% | 1.9% |
| space1 | | | |
| Race | | | |
| | Beulah, ND | Killdeer, ND | United States |
| White | 95.4% | 79.4% | 59.4% |
| Black | 0.0% | 0.0% | 12.2% |
| Asian | 0.9% | 5.2% | 5.6% |
| Native American | 3.3% | 2.7% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.6% | 0.4% |
| Two or More Races | 0.5% | 1.4% | 3.2% |
| Hispanic | 0.0% | 10.8% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Beulah, ND | Killdeer, ND | United States |
| Married Population | 59.3% | 57.1% | 49.8% |
| Currently Married | 58.1% | 57.1% | 48.0% |
| Married but Separated | 1.2% | 0.0% | 1.8% |
| Single Population | 40.7% | 42.9% | 50.2% |
| Never Married | 25.5% | 17.9% | 33.8% |
| Divorced | 5.0% | 16.8% | 10.8% |
| Widowed | 10.2% | 8.2% | 5.6% |
| space5 | | | |
| Household Size | 2.45 | 1.96 | 2.60 |
| Households | 1,219 | 337 | 124,010,992 |
| Family Households | 851 | 131 | 80,755,759 |
| Married couple, w/children | 27.4% | 42.7% | 30.5% |
| Married couple, no children | 55.9% | 47.3% | 42.9% |
| Non Family Households | 368 | 206 | 43,255,233 |
| Single householder, w/children | 8.1% | 6.9% | 15.8% |
| Single householder, no children | 8.6% | 3.1% | 10.8% |