| | Severance, CO | North Liberty, IA | United States |
| Population | 7,691 | 19,976 | 329,725,481 |
| Female Population | 47.4% | 51.0% | 50.5% |
| Male Population | 52.7% | 49.0% | 49.5% |
| Median Age | 32.7 | 31.8 | 38.4 |
| space3 | | | |
| Population - 2010 | 3,204 | 13,648 | 309,327,143 |
| Population - 2000 | 597 | 5,367 | 285,036,114 |
| Population - 1990 | 106 | 2,926 | 251,960,433 |
| Pop. 2000 to Now | 1,178.7% | 267.7% | 15.6% |
| Pop. 1990 to Now | 7,101.9% | 574.5% | 30.8% |
| space4 | | | |
| Population Density | 893.3 | 2,263.1 | 93.4 |
| Land Area | 8.6 | 8.8 | 3,531,905.4 |
| Water Area | 0.1 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Severance, CO | North Liberty, IA | United States |
| Age 0 to 4 | 11.2% | 9.1% | 5.9% |
| Age 5 to 9 | 10.9% | 11.2% | 6.1% |
| Age 10 to 14 | 6.9% | 8.1% | 6.6% |
| Age 15 to 17 | 3.6% | 3.5% | 3.9% |
| Age 18 to 20 | 3.4% | 0.9% | 4.0% |
| Age 21 to 24 | 4.3% | 4.9% | 5.2% |
| Age 25 to 34 | 12.3% | 18.6% | 13.8% |
| Age 35 to 44 | 16.6% | 20.7% | 12.9% |
| Age 45 to 54 | 14.9% | 10.5% | 12.6% |
| Age 55 to 59 | 3.8% | 2.4% | 6.7% |
| Age 60 to 64 | 3.7% | 3.5% | 6.3% |
| Age 65 to 74 | 5.9% | 3.0% | 9.6% |
| Age 75 to 84 | 2.6% | 2.5% | 4.5% |
| Age 85 and over | 0.0% | 1.0% | 1.9% |
| space1 | | | |
| Race | | | |
| | Severance, CO | North Liberty, IA | United States |
| White | 79.1% | 79.4% | 59.4% |
| Black | 0.7% | 5.1% | 12.2% |
| Asian | 0.3% | 4.4% | 5.6% |
| Native American | 0.5% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.2% | 0.2% |
| Other | 0.6% | 0.0% | 0.4% |
| Two or More Races | 5.0% | 5.2% | 3.2% |
| Hispanic | 13.8% | 5.6% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Severance, CO | North Liberty, IA | United States |
| Married Population | 70.3% | 60.5% | 49.8% |
| Currently Married | 69.7% | 59.2% | 48.0% |
| Married but Separated | 0.5% | 1.2% | 1.8% |
| Single Population | 29.7% | 39.5% | 50.2% |
| Never Married | 21.6% | 28.8% | 33.8% |
| Divorced | 6.4% | 7.6% | 10.8% |
| Widowed | 1.7% | 3.1% | 5.6% |
| space5 | | | |
| Household Size | 2.98 | 2.75 | 2.60 |
| Households | 2,577 | 7,276 | 124,010,992 |
| Family Households | 2,192 | 4,998 | 80,755,759 |
| Married couple, w/children | 44.6% | 57.8% | 30.5% |
| Married couple, no children | 41.9% | 27.9% | 42.9% |
| Non Family Households | 385 | 2,278 | 43,255,233 |
| Single householder, w/children | 11.3% | 8.5% | 15.8% |
| Single householder, no children | 2.2% | 5.8% | 10.8% |