| | Mer Rouge, LA | Hudson, WI | United States |
| Population | 685 | 14,500 | 329,725,481 |
| Female Population | 52.3% | 52.4% | 50.5% |
| Male Population | 47.7% | 47.6% | 49.5% |
| Median Age | 43.8 | 39.7 | 38.4 |
| space3 | | | |
| Population - 2010 | 620 | 12,794 | 309,327,143 |
| Population - 2000 | 721 | 8,775 | 285,036,114 |
| Population - 1990 | 586 | 6,378 | 251,960,433 |
| Pop. 2000 to Now | -25.9% | 61.5% | 15.6% |
| Pop. 1990 to Now | -8.9% | 122.1% | 30.8% |
| space4 | | | |
| Population Density | 584.5 | 2,188.0 | 93.4 |
| Land Area | 1.2 | 6.6 | 3,531,905.4 |
| Water Area | 0.0 | 0.9 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Mer Rouge, LA | Hudson, WI | United States |
| Age 0 to 4 | 6.7% | 5.4% | 5.9% |
| Age 5 to 9 | 7.9% | 3.9% | 6.1% |
| Age 10 to 14 | 5.7% | 6.9% | 6.6% |
| Age 15 to 17 | 2.2% | 4.5% | 3.9% |
| Age 18 to 20 | 2.6% | 3.2% | 4.0% |
| Age 21 to 24 | 2.6% | 4.7% | 5.2% |
| Age 25 to 34 | 12.4% | 13.4% | 13.8% |
| Age 35 to 44 | 12.8% | 16.0% | 12.9% |
| Age 45 to 54 | 8.2% | 12.7% | 12.6% |
| Age 55 to 59 | 2.5% | 7.6% | 6.7% |
| Age 60 to 64 | 15.3% | 5.7% | 6.3% |
| Age 65 to 74 | 13.3% | 8.4% | 9.6% |
| Age 75 to 84 | 5.7% | 5.3% | 4.5% |
| Age 85 and over | 2.0% | 2.5% | 1.9% |
| space1 | | | |
| Race | | | |
| | Mer Rouge, LA | Hudson, WI | United States |
| White | 50.7% | 90.2% | 59.4% |
| Black | 45.4% | 0.7% | 12.2% |
| Asian | 0.1% | 1.1% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 3.8% | 2.2% | 3.2% |
| Hispanic | 0.0% | 5.7% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Mer Rouge, LA | Hudson, WI | United States |
| Married Population | 40.1% | 51.2% | 49.8% |
| Currently Married | 33.5% | 50.4% | 48.0% |
| Married but Separated | 6.6% | 0.8% | 1.8% |
| Single Population | 59.9% | 48.8% | 50.2% |
| Never Married | 41.8% | 32.1% | 33.8% |
| Divorced | 5.5% | 10.9% | 10.8% |
| Widowed | 12.6% | 5.9% | 5.6% |
| space5 | | | |
| Household Size | 2.68 | 2.32 | 2.60 |
| Households | 228 | 6,150 | 124,010,992 |
| Family Households | 144 | 3,854 | 80,755,759 |
| Married couple, w/children | 15.3% | 29.9% | 30.5% |
| Married couple, no children | 37.5% | 48.3% | 42.9% |
| Non Family Households | 84 | 2,296 | 43,255,233 |
| Single householder, w/children | 29.9% | 16.5% | 15.8% |
| Single householder, no children | 17.4% | 5.3% | 10.8% |