| | Dallas, NC | Mount Holly, NC | United States |
| Population | 5,777 | 17,315 | 329,725,481 |
| Female Population | 55.9% | 51.7% | 50.5% |
| Male Population | 44.1% | 48.3% | 49.5% |
| Median Age | 38.4 | 37.4 | 38.4 |
| space3 | | | |
| Population - 2010 | 4,469 | 13,660 | 309,327,143 |
| Population - 2000 | 3,402 | 9,618 | 285,036,114 |
| Population - 1990 | 3,012 | 7,710 | 251,960,433 |
| Pop. 2000 to Now | 42.6% | 70.7% | 15.6% |
| Pop. 1990 to Now | 61.1% | 112.9% | 30.8% |
| space4 | | | |
| Population Density | 1,998.3 | 1,595.0 | 93.4 |
| Land Area | 2.9 | 10.9 | 3,531,905.4 |
| Water Area | 0.0 | 0.1 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Dallas, NC | Mount Holly, NC | United States |
| Age 0 to 4 | 5.7% | 4.9% | 5.9% |
| Age 5 to 9 | 6.1% | 6.7% | 6.1% |
| Age 10 to 14 | 5.1% | 5.4% | 6.6% |
| Age 15 to 17 | 9.0% | 3.4% | 3.9% |
| Age 18 to 20 | 2.5% | 2.6% | 4.0% |
| Age 21 to 24 | 3.9% | 6.1% | 5.2% |
| Age 25 to 34 | 11.7% | 16.3% | 13.8% |
| Age 35 to 44 | 19.6% | 12.9% | 12.9% |
| Age 45 to 54 | 10.3% | 16.6% | 12.6% |
| Age 55 to 59 | 9.3% | 7.7% | 6.7% |
| Age 60 to 64 | 4.3% | 6.0% | 6.3% |
| Age 65 to 74 | 8.3% | 7.8% | 9.6% |
| Age 75 to 84 | 3.2% | 2.5% | 4.5% |
| Age 85 and over | 1.0% | 1.2% | 1.9% |
| space1 | | | |
| Race | | | |
| | Dallas, NC | Mount Holly, NC | United States |
| White | 53.0% | 72.6% | 59.4% |
| Black | 26.6% | 15.7% | 12.2% |
| Asian | 0.8% | 5.0% | 5.6% |
| Native American | 1.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.3% | 0.4% |
| Two or More Races | 2.6% | 1.7% | 3.2% |
| Hispanic | 16.0% | 4.6% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Dallas, NC | Mount Holly, NC | United States |
| Married Population | 47.6% | 52.1% | 49.8% |
| Currently Married | 44.6% | 49.1% | 48.0% |
| Married but Separated | 3.0% | 3.0% | 1.8% |
| Single Population | 52.4% | 47.9% | 50.2% |
| Never Married | 36.6% | 32.8% | 33.8% |
| Divorced | 8.5% | 11.3% | 10.8% |
| Widowed | 7.3% | 3.8% | 5.6% |
| space5 | | | |
| Household Size | 2.82 | 2.49 | 2.60 |
| Households | 2,048 | 6,950 | 124,010,992 |
| Family Households | 1,433 | 4,658 | 80,755,759 |
| Married couple, w/children | 34.6% | 24.0% | 30.5% |
| Married couple, no children | 30.3% | 44.2% | 42.9% |
| Non Family Households | 615 | 2,292 | 43,255,233 |
| Single householder, w/children | 24.4% | 23.7% | 15.8% |
| Single householder, no children | 10.7% | 8.1% | 10.8% |