| | Kings Mountain, NC | King, NC | United States |
| Population | 10,775 | 7,258 | 329,725,481 |
| Female Population | 52.6% | 55.4% | 50.5% |
| Male Population | 47.4% | 44.6% | 49.5% |
| Median Age | 41.4 | 47.9 | 38.4 |
| space3 | | | |
| Population - 2010 | 10,691 | 6,871 | 309,327,143 |
| Population - 2000 | 9,693 | 5,952 | 285,036,114 |
| Population - 1990 | 8,763 | 4,059 | 251,960,433 |
| Pop. 2000 to Now | 14.7% | 16.1% | 15.6% |
| Pop. 1990 to Now | 26.9% | 70.3% | 30.8% |
| space4 | | | |
| Population Density | 802.7 | 1,240.5 | 93.4 |
| Land Area | 13.4 | 5.9 | 3,531,905.4 |
| Water Area | 0.2 | 0.1 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Kings Mountain, NC | King, NC | United States |
| Age 0 to 4 | 5.9% | 5.3% | 5.9% |
| Age 5 to 9 | 8.2% | 5.0% | 6.1% |
| Age 10 to 14 | 8.0% | 6.5% | 6.6% |
| Age 15 to 17 | 2.3% | 2.4% | 3.9% |
| Age 18 to 20 | 2.2% | 1.8% | 4.0% |
| Age 21 to 24 | 3.7% | 6.7% | 5.2% |
| Age 25 to 34 | 12.9% | 8.9% | 13.8% |
| Age 35 to 44 | 10.3% | 10.2% | 12.9% |
| Age 45 to 54 | 12.0% | 15.1% | 12.6% |
| Age 55 to 59 | 6.3% | 6.8% | 6.7% |
| Age 60 to 64 | 8.7% | 9.3% | 6.3% |
| Age 65 to 74 | 10.5% | 10.4% | 9.6% |
| Age 75 to 84 | 4.2% | 6.8% | 4.5% |
| Age 85 and over | 4.7% | 4.8% | 1.9% |
| space1 | | | |
| Race | | | |
| | Kings Mountain, NC | King, NC | United States |
| White | 65.2% | 91.2% | 59.4% |
| Black | 27.3% | 3.8% | 12.2% |
| Asian | 1.6% | 0.1% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.1% | 0.0% | 0.4% |
| Two or More Races | 3.7% | 1.0% | 3.2% |
| Hispanic | 2.0% | 3.9% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Kings Mountain, NC | King, NC | United States |
| Married Population | 35.9% | 62.3% | 49.8% |
| Currently Married | 33.9% | 56.3% | 48.0% |
| Married but Separated | 2.0% | 6.0% | 1.8% |
| Single Population | 64.1% | 37.7% | 50.2% |
| Never Married | 33.0% | 19.5% | 33.8% |
| Divorced | 18.6% | 8.8% | 10.8% |
| Widowed | 12.5% | 9.4% | 5.6% |
| space5 | | | |
| Household Size | 2.57 | 2.28 | 2.60 |
| Households | 4,130 | 3,090 | 124,010,992 |
| Family Households | 2,401 | 2,058 | 80,755,759 |
| Married couple, w/children | 16.5% | 26.4% | 30.5% |
| Married couple, no children | 39.8% | 49.0% | 42.9% |
| Non Family Households | 1,729 | 1,032 | 43,255,233 |
| Single householder, w/children | 24.0% | 18.1% | 15.8% |
| Single householder, no children | 19.6% | 6.5% | 10.8% |