| | Superior, CO | Middlefield, CT | United States |
| Population | 13,283 | 4,276 | 329,725,481 |
| Female Population | 49.7% | 50.4% | 50.5% |
| Male Population | 50.3% | 49.7% | 49.5% |
| Median Age | 36.8 | 48.9 | 38.4 |
| space3 | | | |
| Population - 2010 | 12,483 | 4,421 | 309,327,143 |
| Population - 2000 | 9,011 | 4,203 | 285,036,114 |
| Population - 1990 | 255 | 3,925 | 251,960,433 |
| Pop. 2000 to Now | 48.9% | 3.5% | 15.6% |
| Pop. 1990 to Now | 5,160.0% | 10.8% | 30.8% |
| space4 | | | |
| Population Density | 3,365.3 | 338.1 | 93.4 |
| Land Area | 3.9 | 12.6 | 3,531,905.4 |
| Water Area | 0.0 | 0.6 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Superior, CO | Middlefield, CT | United States |
| Age 0 to 4 | 5.7% | 4.1% | 5.9% |
| Age 5 to 9 | 9.6% | 2.2% | 6.1% |
| Age 10 to 14 | 7.7% | 6.9% | 6.6% |
| Age 15 to 17 | 5.4% | 4.1% | 3.9% |
| Age 18 to 20 | 3.0% | 3.6% | 4.0% |
| Age 21 to 24 | 3.2% | 4.4% | 5.2% |
| Age 25 to 34 | 11.6% | 8.3% | 13.8% |
| Age 35 to 44 | 17.3% | 9.4% | 12.9% |
| Age 45 to 54 | 17.8% | 20.0% | 12.6% |
| Age 55 to 59 | 6.0% | 7.3% | 6.7% |
| Age 60 to 64 | 3.8% | 7.8% | 6.3% |
| Age 65 to 74 | 6.8% | 15.3% | 9.6% |
| Age 75 to 84 | 2.1% | 5.7% | 4.5% |
| Age 85 and over | 0.1% | 0.9% | 1.9% |
| space1 | | | |
| Race | | | |
| | Superior, CO | Middlefield, CT | United States |
| White | 70.0% | 90.9% | 59.4% |
| Black | 0.3% | 0.4% | 12.2% |
| Asian | 16.8% | 3.4% | 5.6% |
| Native American | 0.6% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.1% | 0.0% | 0.2% |
| Other | 0.1% | 0.2% | 0.4% |
| Two or More Races | 3.4% | 1.8% | 3.2% |
| Hispanic | 8.7% | 3.3% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Superior, CO | Middlefield, CT | United States |
| Married Population | 64.0% | 52.7% | 49.8% |
| Currently Married | 62.7% | 51.2% | 48.0% |
| Married but Separated | 1.3% | 1.5% | 1.8% |
| Single Population | 36.0% | 47.3% | 50.2% |
| Never Married | 26.0% | 25.6% | 33.8% |
| Divorced | 8.8% | 15.1% | 10.8% |
| Widowed | 1.2% | 6.7% | 5.6% |
| space5 | | | |
| Household Size | 2.85 | 2.37 | 2.60 |
| Households | 4,668 | 1,795 | 124,010,992 |
| Family Households | 3,596 | 1,068 | 80,755,759 |
| Married couple, w/children | 48.6% | 28.2% | 30.5% |
| Married couple, no children | 35.9% | 53.2% | 42.9% |
| Non Family Households | 1,072 | 727 | 43,255,233 |
| Single householder, w/children | 12.8% | 11.4% | 15.8% |
| Single householder, no children | 2.7% | 7.2% | 10.8% |