| | Burlington, CT | Southington, CT | United States |
| Population | 9,511 | 43,474 | 329,725,481 |
| Female Population | 48.0% | 51.7% | 50.5% |
| Male Population | 52.0% | 48.3% | 49.5% |
| Median Age | 41.7 | 45.3 | 38.4 |
| space3 | | | |
| Population - 2010 | 9,340 | 43,155 | 309,327,143 |
| Population - 2000 | 8,190 | 39,728 | 285,036,114 |
| Population - 1990 | 7,026 | 38,518 | 251,960,433 |
| Pop. 2000 to Now | 19.0% | 10.3% | 15.6% |
| Pop. 1990 to Now | 38.7% | 13.8% | 30.8% |
| space4 | | | |
| Population Density | 319.8 | 1,210.9 | 93.4 |
| Land Area | 29.7 | 35.9 | 3,531,905.4 |
| Water Area | 0.7 | 0.7 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Burlington, CT | Southington, CT | United States |
| Age 0 to 4 | 4.3% | 4.3% | 5.9% |
| Age 5 to 9 | 9.2% | 5.8% | 6.1% |
| Age 10 to 14 | 7.4% | 6.1% | 6.6% |
| Age 15 to 17 | 5.3% | 4.0% | 3.9% |
| Age 18 to 20 | 1.4% | 3.0% | 4.0% |
| Age 21 to 24 | 4.1% | 3.7% | 5.2% |
| Age 25 to 34 | 8.3% | 11.1% | 13.8% |
| Age 35 to 44 | 15.5% | 11.6% | 12.9% |
| Age 45 to 54 | 16.6% | 14.7% | 12.6% |
| Age 55 to 59 | 7.4% | 9.3% | 6.7% |
| Age 60 to 64 | 6.7% | 5.6% | 6.3% |
| Age 65 to 74 | 9.1% | 12.1% | 9.6% |
| Age 75 to 84 | 3.7% | 6.2% | 4.5% |
| Age 85 and over | 1.1% | 2.4% | 1.9% |
| space1 | | | |
| Race | | | |
| | Burlington, CT | Southington, CT | United States |
| White | 88.8% | 87.1% | 59.4% |
| Black | 0.3% | 2.3% | 12.2% |
| Asian | 2.8% | 2.9% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.1% | 0.3% | 0.4% |
| Two or More Races | 4.0% | 2.4% | 3.2% |
| Hispanic | 4.0% | 5.1% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Burlington, CT | Southington, CT | United States |
| Married Population | 66.0% | 59.3% | 49.8% |
| Currently Married | 65.9% | 58.9% | 48.0% |
| Married but Separated | 0.1% | 0.4% | 1.8% |
| Single Population | 34.0% | 40.7% | 50.2% |
| Never Married | 24.4% | 26.0% | 33.8% |
| Divorced | 6.5% | 8.7% | 10.8% |
| Widowed | 3.1% | 6.0% | 5.6% |
| space5 | | | |
| Household Size | 2.86 | 2.52 | 2.60 |
| Households | 3,318 | 17,149 | 124,010,992 |
| Family Households | 2,732 | 12,200 | 80,755,759 |
| Married couple, w/children | 45.0% | 32.1% | 30.5% |
| Married couple, no children | 43.1% | 52.4% | 42.9% |
| Non Family Households | 586 | 4,949 | 43,255,233 |
| Single householder, w/children | 7.4% | 8.5% | 15.8% |
| Single householder, no children | 4.5% | 7.0% | 10.8% |