| | Burlington, KY | Ashland, KY | United States |
| Population | 18,394 | 21,695 | 329,725,481 |
| Female Population | 50.5% | 54.3% | 50.5% |
| Male Population | 49.5% | 45.7% | 49.5% |
| Median Age | 37.6 | 41.5 | 38.4 |
| space3 | | | |
| Population - 2010 | 15,702 | 21,712 | 309,327,143 |
| Population - 2000 | 10,779 | 21,981 | 285,036,114 |
| Population - 1990 | 6,070 | 23,622 | 251,960,433 |
| Pop. 2000 to Now | 64.3% | -8.7% | 15.6% |
| Pop. 1990 to Now | 191.7% | -15.0% | 30.8% |
| space4 | | | |
| Population Density | 2,086.2 | 2,020.4 | 93.4 |
| Land Area | 8.8 | 10.7 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Burlington, KY | Ashland, KY | United States |
| Age 0 to 4 | 5.2% | 5.8% | 5.9% |
| Age 5 to 9 | 7.3% | 5.8% | 6.1% |
| Age 10 to 14 | 5.7% | 6.0% | 6.6% |
| Age 15 to 17 | 6.2% | 4.2% | 3.9% |
| Age 18 to 20 | 4.3% | 3.5% | 4.0% |
| Age 21 to 24 | 6.1% | 4.1% | 5.2% |
| Age 25 to 34 | 11.9% | 11.2% | 13.8% |
| Age 35 to 44 | 12.1% | 13.9% | 12.9% |
| Age 45 to 54 | 17.4% | 11.9% | 12.6% |
| Age 55 to 59 | 7.6% | 6.6% | 6.7% |
| Age 60 to 64 | 4.5% | 7.6% | 6.3% |
| Age 65 to 74 | 8.2% | 11.4% | 9.6% |
| Age 75 to 84 | 2.5% | 6.1% | 4.5% |
| Age 85 and over | 1.0% | 1.8% | 1.9% |
| space1 | | | |
| Race | | | |
| | Burlington, KY | Ashland, KY | United States |
| White | 85.4% | 91.3% | 59.4% |
| Black | 4.6% | 1.6% | 12.2% |
| Asian | 2.3% | 0.6% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.2% | 0.1% | 0.4% |
| Two or More Races | 2.2% | 3.7% | 3.2% |
| Hispanic | 5.4% | 2.7% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Burlington, KY | Ashland, KY | United States |
| Married Population | 55.0% | 48.0% | 49.8% |
| Currently Married | 52.9% | 44.8% | 48.0% |
| Married but Separated | 2.1% | 3.2% | 1.8% |
| Single Population | 45.0% | 52.0% | 50.2% |
| Never Married | 31.7% | 25.5% | 33.8% |
| Divorced | 8.8% | 19.1% | 10.8% |
| Widowed | 4.5% | 7.4% | 5.6% |
| space5 | | | |
| Household Size | 2.83 | 2.42 | 2.60 |
| Households | 6,351 | 8,859 | 124,010,992 |
| Family Households | 4,747 | 5,445 | 80,755,759 |
| Married couple, w/children | 36.8% | 26.8% | 30.5% |
| Married couple, no children | 45.4% | 39.4% | 42.9% |
| Non Family Households | 1,604 | 3,414 | 43,255,233 |
| Single householder, w/children | 13.5% | 23.7% | 15.8% |
| Single householder, no children | 4.4% | 10.2% | 10.8% |