| | Kings Mountain, NC | Belmont, NC | United States |
| Population | 10,775 | 14,442 | 329,725,481 |
| Female Population | 52.6% | 54.4% | 50.5% |
| Male Population | 47.4% | 45.6% | 49.5% |
| Median Age | 41.4 | 35.7 | 38.4 |
| space3 | | | |
| Population - 2010 | 10,691 | 10,230 | 309,327,143 |
| Population - 2000 | 9,693 | 8,705 | 285,036,114 |
| Population - 1990 | 8,763 | 8,434 | 251,960,433 |
| Pop. 2000 to Now | 14.7% | 45.0% | 15.6% |
| Pop. 1990 to Now | 26.9% | 49.7% | 30.8% |
| space4 | | | |
| Population Density | 802.7 | 1,202.2 | 93.4 |
| Land Area | 13.4 | 12.0 | 3,531,905.4 |
| Water Area | 0.2 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Kings Mountain, NC | Belmont, NC | United States |
| Age 0 to 4 | 5.9% | 6.4% | 5.9% |
| Age 5 to 9 | 8.2% | 7.8% | 6.1% |
| Age 10 to 14 | 8.0% | 7.5% | 6.6% |
| Age 15 to 17 | 2.3% | 3.9% | 3.9% |
| Age 18 to 20 | 2.2% | 5.5% | 4.0% |
| Age 21 to 24 | 3.7% | 3.5% | 5.2% |
| Age 25 to 34 | 12.9% | 14.9% | 13.8% |
| Age 35 to 44 | 10.3% | 11.8% | 12.9% |
| Age 45 to 54 | 12.0% | 14.4% | 12.6% |
| Age 55 to 59 | 6.3% | 6.8% | 6.7% |
| Age 60 to 64 | 8.7% | 4.0% | 6.3% |
| Age 65 to 74 | 10.5% | 8.7% | 9.6% |
| Age 75 to 84 | 4.2% | 3.8% | 4.5% |
| Age 85 and over | 4.7% | 1.2% | 1.9% |
| space1 | | | |
| Race | | | |
| | Kings Mountain, NC | Belmont, NC | United States |
| White | 65.2% | 78.2% | 59.4% |
| Black | 27.3% | 10.2% | 12.2% |
| Asian | 1.6% | 3.2% | 5.6% |
| Native American | 0.0% | 0.1% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.1% | 0.4% | 0.4% |
| Two or More Races | 3.7% | 4.9% | 3.2% |
| Hispanic | 2.0% | 3.0% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Kings Mountain, NC | Belmont, NC | United States |
| Married Population | 35.9% | 48.3% | 49.8% |
| Currently Married | 33.9% | 43.7% | 48.0% |
| Married but Separated | 2.0% | 4.6% | 1.8% |
| Single Population | 64.1% | 51.7% | 50.2% |
| Never Married | 33.0% | 33.9% | 33.8% |
| Divorced | 18.6% | 13.3% | 10.8% |
| Widowed | 12.5% | 4.5% | 5.6% |
| space5 | | | |
| Household Size | 2.57 | 2.48 | 2.60 |
| Households | 4,130 | 5,523 | 124,010,992 |
| Family Households | 2,401 | 3,310 | 80,755,759 |
| Married couple, w/children | 16.5% | 31.8% | 30.5% |
| Married couple, no children | 39.8% | 39.4% | 42.9% |
| Non Family Households | 1,729 | 2,213 | 43,255,233 |
| Single householder, w/children | 24.0% | 23.0% | 15.8% |
| Single householder, no children | 19.6% | 5.9% | 10.8% |