| | Mansura, LA | Donaldsonville, LA | United States |
| Population | 1,098 | 6,834 | 329,725,481 |
| Female Population | 60.3% | 58.9% | 50.5% |
| Male Population | 39.7% | 41.2% | 49.5% |
| Median Age | 51 | 29.4 | 38.4 |
| space3 | | | |
| Population - 2010 | 1,459 | 7,466 | 309,327,143 |
| Population - 2000 | 1,573 | 7,605 | 285,036,114 |
| Population - 1990 | 1,601 | 7,949 | 251,960,433 |
| Pop. 2000 to Now | -14.7% | 13.6% | 15.6% |
| Pop. 1990 to Now | -16.2% | 8.7% | 30.8% |
| space4 | | | |
| Population Density | 384.7 | 1,803.6 | 93.4 |
| Land Area | 2.9 | 3.8 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Mansura, LA | Donaldsonville, LA | United States |
| Age 0 to 4 | 5.3% | 15.0% | 5.9% |
| Age 5 to 9 | 6.7% | 6.4% | 6.1% |
| Age 10 to 14 | 4.1% | 8.1% | 6.6% |
| Age 15 to 17 | 5.6% | 6.5% | 3.9% |
| Age 18 to 20 | 1.0% | 3.9% | 4.0% |
| Age 21 to 24 | 3.6% | 2.8% | 5.2% |
| Age 25 to 34 | 6.3% | 13.1% | 13.8% |
| Age 35 to 44 | 12.2% | 8.7% | 12.9% |
| Age 45 to 54 | 11.7% | 9.3% | 12.6% |
| Age 55 to 59 | 7.7% | 4.3% | 6.7% |
| Age 60 to 64 | 10.7% | 3.4% | 6.3% |
| Age 65 to 74 | 12.2% | 10.4% | 9.6% |
| Age 75 to 84 | 6.5% | 5.1% | 4.5% |
| Age 85 and over | 6.5% | 2.8% | 1.9% |
| space1 | | | |
| Race | | | |
| | Mansura, LA | Donaldsonville, LA | United States |
| White | 32.9% | 14.7% | 59.4% |
| Black | 57.6% | 82.2% | 12.2% |
| Asian | 0.0% | 0.0% | 5.6% |
| Native American | 2.6% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.5% | 0.0% | 0.4% |
| Two or More Races | 6.5% | 1.5% | 3.2% |
| Hispanic | 0.0% | 1.6% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Mansura, LA | Donaldsonville, LA | United States |
| Married Population | 26.7% | 35.2% | 49.8% |
| Currently Married | 21.4% | 34.1% | 48.0% |
| Married but Separated | 5.3% | 1.1% | 1.8% |
| Single Population | 73.3% | 64.8% | 50.2% |
| Never Married | 38.7% | 38.6% | 33.8% |
| Divorced | 15.3% | 13.0% | 10.8% |
| Widowed | 19.3% | 13.2% | 5.6% |
| space5 | | | |
| Household Size | 1.98 | 2.78 | 2.60 |
| Households | 483 | 2,440 | 124,010,992 |
| Family Households | 202 | 1,423 | 80,755,759 |
| Married couple, w/children | 3.5% | 15.7% | 30.5% |
| Married couple, no children | 32.7% | 28.0% | 42.9% |
| Non Family Households | 281 | 1,017 | 43,255,233 |
| Single householder, w/children | 61.4% | 47.7% | 15.8% |
| Single householder, no children | 2.5% | 8.6% | 10.8% |