| | Chattanooga Valley, GA | Madison, GA | United States |
| Population | 3,716 | 4,404 | 329,725,481 |
| Female Population | 47.5% | 57.0% | 50.5% |
| Male Population | 52.5% | 43.0% | 49.5% |
| Median Age | 45.5 | 44.5 | 38.4 |
| space3 | | | |
| Population - 2010 | 4,094 | 3,990 | 309,327,143 |
| Population - 2000 | 4,065 | 3,636 | 285,036,114 |
| Population - 1990 | 4,088 | 3,483 | 251,960,433 |
| Pop. 2000 to Now | -4.4% | 17.1% | 15.6% |
| Pop. 1990 to Now | -4.9% | 22.3% | 30.8% |
| space4 | | | |
| Population Density | 500.8 | 505.2 | 93.4 |
| Land Area | 7.4 | 8.7 | 3,531,905.4 |
| Water Area | 0.0 | 0.1 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Chattanooga Valley, GA | Madison, GA | United States |
| Age 0 to 4 | 6.8% | 7.7% | 5.9% |
| Age 5 to 9 | 6.0% | 5.9% | 6.1% |
| Age 10 to 14 | 5.1% | 7.7% | 6.6% |
| Age 15 to 17 | 2.5% | 0.9% | 3.9% |
| Age 18 to 20 | 2.3% | 1.0% | 4.0% |
| Age 21 to 24 | 1.9% | 1.2% | 5.2% |
| Age 25 to 34 | 16.6% | 18.1% | 13.8% |
| Age 35 to 44 | 8.2% | 9.1% | 12.9% |
| Age 45 to 54 | 15.3% | 8.0% | 12.6% |
| Age 55 to 59 | 9.2% | 7.8% | 6.7% |
| Age 60 to 64 | 6.1% | 10.2% | 6.3% |
| Age 65 to 74 | 10.4% | 12.8% | 9.6% |
| Age 75 to 84 | 8.6% | 7.8% | 4.5% |
| Age 85 and over | 1.4% | 1.8% | 1.9% |
| space1 | | | |
| Race | | | |
| | Chattanooga Valley, GA | Madison, GA | United States |
| White | 85.8% | 59.5% | 59.4% |
| Black | 1.7% | 34.6% | 12.2% |
| Asian | 0.8% | 0.0% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 1.8% | 0.4% |
| Two or More Races | 2.8% | 0.6% | 3.2% |
| Hispanic | 8.9% | 3.5% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Chattanooga Valley, GA | Madison, GA | United States |
| Married Population | 50.6% | 51.2% | 49.8% |
| Currently Married | 49.0% | 49.4% | 48.0% |
| Married but Separated | 1.6% | 1.7% | 1.8% |
| Single Population | 49.4% | 48.8% | 50.2% |
| Never Married | 20.0% | 23.3% | 33.8% |
| Divorced | 23.7% | 11.9% | 10.8% |
| Widowed | 5.7% | 13.6% | 5.6% |
| space5 | | | |
| Household Size | 2.76 | 2.21 | 2.60 |
| Households | 1,346 | 1,955 | 124,010,992 |
| Family Households | 943 | 1,400 | 80,755,759 |
| Married couple, w/children | 29.3% | 25.4% | 30.5% |
| Married couple, no children | 47.1% | 35.6% | 42.9% |
| Non Family Households | 403 | 555 | 43,255,233 |
| Single householder, w/children | 10.1% | 20.6% | 15.8% |
| Single householder, no children | 13.6% | 18.4% | 10.8% |