| | Chauvin, LA | Galliano, LA | United States |
| Population | 2,837 | 7,378 | 329,725,481 |
| Female Population | 46.2% | 48.8% | 50.5% |
| Male Population | 53.8% | 51.2% | 49.5% |
| Median Age | 32.8 | 40 | 38.4 |
| space3 | | | |
| Population - 2010 | 3,220 | 7,922 | 309,327,143 |
| Population - 2000 | 3,229 | 7,356 | 285,036,114 |
| Population - 1990 | 3,375 | 4,294 | 251,960,433 |
| Pop. 2000 to Now | -19.9% | 3.3% | 15.6% |
| Pop. 1990 to Now | -23.4% | 76.9% | 30.8% |
| space4 | | | |
| Population Density | 595.9 | 662.0 | 93.4 |
| Land Area | 4.8 | 11.1 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Chauvin, LA | Galliano, LA | United States |
| Age 0 to 4 | 0.9% | 6.7% | 5.9% |
| Age 5 to 9 | 6.0% | 7.8% | 6.1% |
| Age 10 to 14 | 10.3% | 4.2% | 6.6% |
| Age 15 to 17 | 7.1% | 2.4% | 3.9% |
| Age 18 to 20 | 4.6% | 2.9% | 4.0% |
| Age 21 to 24 | 10.8% | 3.1% | 5.2% |
| Age 25 to 34 | 13.1% | 15.9% | 13.8% |
| Age 35 to 44 | 4.3% | 10.6% | 12.9% |
| Age 45 to 54 | 13.7% | 11.4% | 12.6% |
| Age 55 to 59 | 8.1% | 11.1% | 6.7% |
| Age 60 to 64 | 8.3% | 7.0% | 6.3% |
| Age 65 to 74 | 5.1% | 9.0% | 9.6% |
| Age 75 to 84 | 3.9% | 5.8% | 4.5% |
| Age 85 and over | 4.0% | 2.0% | 1.9% |
| space1 | | | |
| Race | | | |
| | Chauvin, LA | Galliano, LA | United States |
| White | 83.5% | 72.4% | 59.4% |
| Black | 0.3% | 2.7% | 12.2% |
| Asian | 0.0% | 0.0% | 5.6% |
| Native American | 6.1% | 4.9% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 3.9% | 2.5% | 3.2% |
| Hispanic | 6.3% | 17.5% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Chauvin, LA | Galliano, LA | United States |
| Married Population | 49.1% | 55.8% | 49.8% |
| Currently Married | 48.8% | 51.7% | 48.0% |
| Married but Separated | 0.3% | 4.1% | 1.8% |
| Single Population | 50.9% | 44.2% | 50.2% |
| Never Married | 29.4% | 23.6% | 33.8% |
| Divorced | 13.1% | 10.0% | 10.8% |
| Widowed | 8.4% | 10.5% | 5.6% |
| space5 | | | |
| Household Size | 2.97 | 2.38 | 2.60 |
| Households | 956 | 3,087 | 124,010,992 |
| Family Households | 731 | 1,862 | 80,755,759 |
| Married couple, w/children | 41.9% | 33.2% | 30.5% |
| Married couple, no children | 31.7% | 43.3% | 42.9% |
| Non Family Households | 225 | 1,225 | 43,255,233 |
| Single householder, w/children | 8.2% | 16.5% | 15.8% |
| Single householder, no children | 18.2% | 7.0% | 10.8% |