| | Mountain City, GA | Clarkesville, GA | United States |
| Population | 1,010 | 1,644 | 329,725,481 |
| Female Population | 54.9% | 55.8% | 50.5% |
| Male Population | 45.2% | 44.2% | 49.5% |
| Median Age | 40.5 | 46 | 38.4 |
| space3 | | | |
| Population - 2010 | 1,080 | 1,711 | 309,327,143 |
| Population - 2000 | 829 | 1,248 | 285,036,114 |
| Population - 1990 | 784 | 1,151 | 251,960,433 |
| Pop. 2000 to Now | 34.3% | 47.7% | 15.6% |
| Pop. 1990 to Now | 42.0% | 60.1% | 30.8% |
| space4 | | | |
| Population Density | 556.2 | 668.8 | 93.4 |
| Land Area | 1.8 | 2.5 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Mountain City, GA | Clarkesville, GA | United States |
| Age 0 to 4 | 3.1% | 8.3% | 5.9% |
| Age 5 to 9 | 5.9% | 5.1% | 6.1% |
| Age 10 to 14 | 5.9% | 4.4% | 6.6% |
| Age 15 to 17 | 6.4% | 0.9% | 3.9% |
| Age 18 to 20 | 2.4% | 1.2% | 4.0% |
| Age 21 to 24 | 4.7% | 4.6% | 5.2% |
| Age 25 to 34 | 15.9% | 13.0% | 13.8% |
| Age 35 to 44 | 7.3% | 10.6% | 12.9% |
| Age 45 to 54 | 16.5% | 10.8% | 12.6% |
| Age 55 to 59 | 5.7% | 6.6% | 6.7% |
| Age 60 to 64 | 5.8% | 5.8% | 6.3% |
| Age 65 to 74 | 11.5% | 15.0% | 9.6% |
| Age 75 to 84 | 4.2% | 4.4% | 4.5% |
| Age 85 and over | 4.6% | 9.2% | 1.9% |
| space1 | | | |
| Race | | | |
| | Mountain City, GA | Clarkesville, GA | United States |
| White | 73.6% | 79.4% | 59.4% |
| Black | 0.0% | 9.1% | 12.2% |
| Asian | 0.0% | 2.3% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 6.1% | 8.0% | 3.2% |
| Hispanic | 20.3% | 1.2% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Mountain City, GA | Clarkesville, GA | United States |
| Married Population | 50.9% | 45.4% | 49.8% |
| Currently Married | 39.6% | 43.7% | 48.0% |
| Married but Separated | 11.3% | 1.7% | 1.8% |
| Single Population | 49.1% | 54.6% | 50.2% |
| Never Married | 30.6% | 24.9% | 33.8% |
| Divorced | 9.0% | 20.8% | 10.8% |
| Widowed | 9.5% | 8.9% | 5.6% |
| space5 | | | |
| Household Size | 2.99 | 2.16 | 2.60 |
| Households | 338 | 710 | 124,010,992 |
| Family Households | 188 | 365 | 80,755,759 |
| Married couple, w/children | 36.2% | 23.8% | 30.5% |
| Married couple, no children | 39.9% | 49.0% | 42.9% |
| Non Family Households | 150 | 345 | 43,255,233 |
| Single householder, w/children | 10.6% | 14.2% | 15.8% |
| Single householder, no children | 13.3% | 12.9% | 10.8% |