| | Greensboro, GA | Santa Ana, CA | United States |
| Population | 3,538 | 313,818 | 329,725,481 |
| Female Population | 57.7% | 48.6% | 50.5% |
| Male Population | 42.3% | 51.4% | 49.5% |
| Median Age | 41.3 | 33 | 38.4 |
| space3 | | | |
| Population - 2010 | 3,375 | 325,069 | 309,327,143 |
| Population - 2000 | 3,238 | 337,977 | 285,036,114 |
| Population - 1990 | 2,860 | 293,742 | 251,960,433 |
| Pop. 2000 to Now | 1.1% | -2.0% | 15.6% |
| Pop. 1990 to Now | 14.4% | 12.8% | 30.8% |
| space4 | | | |
| Population Density | 525.6 | 11,469.5 | 93.4 |
| Land Area | 6.7 | 27.4 | 3,531,905.4 |
| Water Area | 0.1 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Greensboro, GA | Santa Ana, CA | United States |
| Age 0 to 4 | 3.4% | 6.4% | 5.9% |
| Age 5 to 9 | 5.5% | 6.5% | 6.1% |
| Age 10 to 14 | 7.6% | 7.6% | 6.6% |
| Age 15 to 17 | 1.4% | 4.4% | 3.9% |
| Age 18 to 20 | 3.5% | 4.6% | 4.0% |
| Age 21 to 24 | 10.2% | 6.4% | 5.2% |
| Age 25 to 34 | 14.1% | 16.7% | 13.8% |
| Age 35 to 44 | 7.5% | 14.1% | 12.9% |
| Age 45 to 54 | 12.0% | 12.8% | 12.6% |
| Age 55 to 59 | 6.4% | 5.9% | 6.7% |
| Age 60 to 64 | 8.1% | 4.5% | 6.3% |
| Age 65 to 74 | 14.0% | 6.1% | 9.6% |
| Age 75 to 84 | 3.0% | 2.4% | 4.5% |
| Age 85 and over | 3.4% | 1.4% | 1.9% |
| space1 | | | |
| Race | | | |
| | Greensboro, GA | Santa Ana, CA | United States |
| White | 36.9% | 9.5% | 59.4% |
| Black | 56.4% | 0.9% | 12.2% |
| Asian | 0.0% | 11.8% | 5.6% |
| Native American | 0.0% | 0.1% | 0.6% |
| Hawaiian, Pacific Islander | 0.1% | 0.2% | 0.2% |
| Other | 0.0% | 0.1% | 0.4% |
| Two or More Races | 0.7% | 0.8% | 3.2% |
| Hispanic | 5.9% | 76.7% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Greensboro, GA | Santa Ana, CA | United States |
| Married Population | 29.2% | 45.8% | 49.8% |
| Currently Married | 25.5% | 43.8% | 48.0% |
| Married but Separated | 3.8% | 2.0% | 1.8% |
| Single Population | 70.8% | 54.2% | 50.2% |
| Never Married | 48.7% | 42.7% | 33.8% |
| Divorced | 12.4% | 7.5% | 10.8% |
| Widowed | 9.6% | 3.9% | 5.6% |
| space5 | | | |
| Household Size | 2.25 | 4.04 | 2.60 |
| Households | 1,529 | 76,624 | 124,010,992 |
| Family Households | 852 | 61,790 | 80,755,759 |
| Married couple, w/children | 8.1% | 37.9% | 30.5% |
| Married couple, no children | 30.0% | 30.2% | 42.9% |
| Non Family Households | 677 | 14,834 | 43,255,233 |
| Single householder, w/children | 31.5% | 17.2% | 15.8% |
| Single householder, no children | 30.4% | 14.6% | 10.8% |