| | New Orleans, LA | Auburn, AL | United States |
| Population | 383,974 | 74,637 | 329,725,481 |
| Female Population | 52.5% | 50.7% | 50.5% |
| Male Population | 47.5% | 49.3% | 49.5% |
| Median Age | 37.7 | 26.6 | 38.4 |
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| Population - 2010 | 347,789 | 53,775 | 309,327,143 |
| Population - 2000 | 484,674 | 42,987 | 285,036,114 |
| Population - 1990 | 496,938 | 33,830 | 251,960,433 |
| Pop. 2000 to Now | -19.6% | 59.0% | 15.6% |
| Pop. 1990 to Now | -21.6% | 102.0% | 30.8% |
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| Population Density | 2,266.3 | 1,241.2 | 93.4 |
| Land Area | 169.4 | 60.1 | 3,531,905.4 |
| Water Area | 180.4 | 1.0 | 264,836.8 |
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| Est. Total Population By Age | | | |
| | New Orleans, LA | Auburn, AL | United States |
| Age 0 to 4 | 5.7% | 4.9% | 5.9% |
| Age 5 to 9 | 5.4% | 5.0% | 6.1% |
| Age 10 to 14 | 5.7% | 6.1% | 6.6% |
| Age 15 to 17 | 3.2% | 3.1% | 3.9% |
| Age 18 to 20 | 4.0% | 14.4% | 4.0% |
| Age 21 to 24 | 4.4% | 13.3% | 5.2% |
| Age 25 to 34 | 17.1% | 14.3% | 13.8% |
| Age 35 to 44 | 14.2% | 11.4% | 12.9% |
| Age 45 to 54 | 11.9% | 10.5% | 12.6% |
| Age 55 to 59 | 6.6% | 3.7% | 6.7% |
| Age 60 to 64 | 6.6% | 4.1% | 6.3% |
| Age 65 to 74 | 9.7% | 5.7% | 9.6% |
| Age 75 to 84 | 3.8% | 2.5% | 4.5% |
| Age 85 and over | 1.7% | 1.1% | 1.9% |
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| Race | | | |
| | New Orleans, LA | Auburn, AL | United States |
| White | 30.6% | 68.6% | 59.4% |
| Black | 57.6% | 17.7% | 12.2% |
| Asian | 2.7% | 8.5% | 5.6% |
| Native American | 0.1% | 0.1% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.8% | 0.0% | 0.4% |
| Two or More Races | 2.6% | 1.7% | 3.2% |
| Hispanic | 5.6% | 3.4% | 18.4% |
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| Marriage & Family | | | |
| | New Orleans, LA | Auburn, AL | United States |
| Married Population | 32.0% | 41.3% | 49.8% |
| Currently Married | 29.4% | 39.9% | 48.0% |
| Married but Separated | 2.6% | 1.4% | 1.8% |
| Single Population | 68.0% | 58.7% | 50.2% |
| Never Married | 49.7% | 50.1% | 33.8% |
| Divorced | 12.8% | 6.3% | 10.8% |
| Widowed | 5.5% | 2.3% | 5.6% |
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| Household Size | 2.37 | 2.50 | 2.60 |
| Households | 156,586 | 27,656 | 124,010,992 |
| Family Households | 71,845 | 14,811 | 80,755,759 |
| Married couple, w/children | 19.8% | 39.0% | 30.5% |
| Married couple, no children | 37.4% | 39.4% | 42.9% |
| Non Family Households | 84,741 | 12,845 | 43,255,233 |
| Single householder, w/children | 26.1% | 12.4% | 15.8% |
| Single householder, no children | 16.8% | 9.2% | 10.8% |