| | Lineville, AL | Hartselle, AL | United States |
| Population | 2,598 | 15,308 | 329,725,481 |
| Female Population | 51.1% | 53.3% | 50.5% |
| Male Population | 48.9% | 46.7% | 49.5% |
| Median Age | 55.5 | 40.1 | 38.4 |
| space3 | | | |
| Population - 2010 | 2,413 | 14,273 | 309,327,143 |
| Population - 2000 | 2,401 | 12,019 | 285,036,114 |
| Population - 1990 | 2,394 | 10,795 | 251,960,433 |
| Pop. 2000 to Now | -7.5% | 20.4% | 15.6% |
| Pop. 1990 to Now | -7.2% | 34.0% | 30.8% |
| space4 | | | |
| Population Density | 268.8 | 931.4 | 93.4 |
| Land Area | 9.7 | 16.4 | 3,531,905.4 |
| Water Area | 0.1 | 0.1 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Lineville, AL | Hartselle, AL | United States |
| Age 0 to 4 | 6.5% | 5.4% | 5.9% |
| Age 5 to 9 | 2.3% | 6.8% | 6.1% |
| Age 10 to 14 | 5.7% | 5.6% | 6.6% |
| Age 15 to 17 | 3.0% | 5.0% | 3.9% |
| Age 18 to 20 | 2.1% | 3.7% | 4.0% |
| Age 21 to 24 | 0.8% | 5.1% | 5.2% |
| Age 25 to 34 | 8.6% | 11.7% | 13.8% |
| Age 35 to 44 | 8.5% | 11.8% | 12.9% |
| Age 45 to 54 | 11.5% | 14.4% | 12.6% |
| Age 55 to 59 | 12.7% | 6.3% | 6.7% |
| Age 60 to 64 | 11.7% | 7.5% | 6.3% |
| Age 65 to 74 | 14.3% | 10.0% | 9.6% |
| Age 75 to 84 | 8.5% | 5.1% | 4.5% |
| Age 85 and over | 4.0% | 1.7% | 1.9% |
| space1 | | | |
| Race | | | |
| | Lineville, AL | Hartselle, AL | United States |
| White | 61.6% | 84.0% | 59.4% |
| Black | 36.7% | 6.0% | 12.2% |
| Asian | 0.0% | 0.9% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.4% | 0.1% | 0.4% |
| Two or More Races | 1.3% | 6.3% | 3.2% |
| Hispanic | 0.0% | 2.7% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Lineville, AL | Hartselle, AL | United States |
| Married Population | 49.0% | 54.9% | 49.8% |
| Currently Married | 46.7% | 54.6% | 48.0% |
| Married but Separated | 2.2% | 0.4% | 1.8% |
| Single Population | 51.0% | 45.1% | 50.2% |
| Never Married | 22.4% | 26.8% | 33.8% |
| Divorced | 13.8% | 10.6% | 10.8% |
| Widowed | 14.8% | 7.7% | 5.6% |
| space5 | | | |
| Household Size | 2.14 | 2.68 | 2.60 |
| Households | 1,168 | 5,711 | 124,010,992 |
| Family Households | 672 | 4,208 | 80,755,759 |
| Married couple, w/children | 15.2% | 29.4% | 30.5% |
| Married couple, no children | 53.4% | 44.6% | 42.9% |
| Non Family Households | 496 | 1,503 | 43,255,233 |
| Single householder, w/children | 22.6% | 13.5% | 15.8% |
| Single householder, no children | 8.8% | 12.6% | 10.8% |