| | Johnsburg, IL | Columbus, GA | United States |
| Population | 6,399 | 204,366 | 329,725,481 |
| Female Population | 52.4% | 51.2% | 50.5% |
| Male Population | 47.6% | 48.8% | 49.5% |
| Median Age | 39.9 | 34.6 | 38.4 |
| space3 | | | |
| Population - 2010 | 6,434 | 191,122 | 309,327,143 |
| Population - 2000 | 5,391 | 184,652 | 285,036,114 |
| Population - 1990 | 5,081 | 178,069 | 251,960,433 |
| Pop. 2000 to Now | 17.1% | 6.4% | 15.6% |
| Pop. 1990 to Now | 24.2% | 10.3% | 30.8% |
| space4 | | | |
| Population Density | 903.2 | 944.2 | 93.4 |
| Land Area | 7.1 | 216.4 | 3,531,905.4 |
| Water Area | 0.6 | 4.6 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Johnsburg, IL | Columbus, GA | United States |
| Age 0 to 4 | 5.9% | 7.1% | 5.9% |
| Age 5 to 9 | 5.1% | 7.1% | 6.1% |
| Age 10 to 14 | 10.7% | 7.0% | 6.6% |
| Age 15 to 17 | 6.4% | 3.8% | 3.9% |
| Age 18 to 20 | 2.9% | 4.2% | 4.0% |
| Age 21 to 24 | 3.5% | 5.5% | 5.2% |
| Age 25 to 34 | 9.3% | 16.0% | 13.8% |
| Age 35 to 44 | 12.7% | 12.9% | 12.9% |
| Age 45 to 54 | 11.9% | 11.3% | 12.6% |
| Age 55 to 59 | 9.9% | 5.7% | 6.7% |
| Age 60 to 64 | 6.8% | 5.9% | 6.3% |
| Age 65 to 74 | 8.9% | 8.1% | 9.6% |
| Age 75 to 84 | 5.1% | 3.5% | 4.5% |
| Age 85 and over | 0.8% | 1.8% | 1.9% |
| space1 | | | |
| Race | | | |
| | Johnsburg, IL | Columbus, GA | United States |
| White | 88.2% | 39.2% | 59.4% |
| Black | 0.8% | 45.4% | 12.2% |
| Asian | 2.4% | 2.6% | 5.6% |
| Native American | 0.0% | 0.1% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.1% | 0.2% |
| Other | 0.8% | 0.4% | 0.4% |
| Two or More Races | 4.7% | 4.3% | 3.2% |
| Hispanic | 3.1% | 7.9% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Johnsburg, IL | Columbus, GA | United States |
| Married Population | 57.9% | 42.1% | 49.8% |
| Currently Married | 57.7% | 39.0% | 48.0% |
| Married but Separated | 0.2% | 3.2% | 1.8% |
| Single Population | 42.1% | 57.9% | 50.2% |
| Never Married | 27.5% | 38.0% | 33.8% |
| Divorced | 9.9% | 13.5% | 10.8% |
| Widowed | 4.6% | 6.4% | 5.6% |
| space5 | | | |
| Household Size | 2.98 | 2.52 | 2.60 |
| Households | 2,150 | 78,491 | 124,010,992 |
| Family Households | 1,781 | 47,216 | 80,755,759 |
| Married couple, w/children | 35.0% | 24.6% | 30.5% |
| Married couple, no children | 44.1% | 35.2% | 42.9% |
| Non Family Households | 369 | 31,275 | 43,255,233 |
| Single householder, w/children | 17.7% | 26.9% | 15.8% |
| Single householder, no children | 3.2% | 13.2% | 10.8% |