| | Montegut, LA | Chauvin, LA | United States |
| Population | 1,469 | 2,837 | 329,725,481 |
| Female Population | 48.7% | 46.2% | 50.5% |
| Male Population | 51.3% | 53.8% | 49.5% |
| Median Age | 41.7 | 32.8 | 38.4 |
| space3 | | | |
| Population - 2010 | 1,079 | 3,220 | 309,327,143 |
| Population - 2000 | 1,803 | 3,229 | 285,036,114 |
| Population - 1990 | 1,784 | 3,375 | 251,960,433 |
| Pop. 2000 to Now | 6.5% | -19.9% | 15.6% |
| Pop. 1990 to Now | 7.7% | -23.4% | 30.8% |
| space4 | | | |
| Population Density | 350.4 | 595.9 | 93.4 |
| Land Area | 4.2 | 4.8 | 3,531,905.4 |
| Water Area | 0.3 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Montegut, LA | Chauvin, LA | United States |
| Age 0 to 4 | 8.2% | 0.9% | 5.9% |
| Age 5 to 9 | 6.6% | 6.0% | 6.1% |
| Age 10 to 14 | 5.9% | 10.3% | 6.6% |
| Age 15 to 17 | 5.7% | 7.1% | 3.9% |
| Age 18 to 20 | 1.2% | 4.6% | 4.0% |
| Age 21 to 24 | 7.0% | 10.8% | 5.2% |
| Age 25 to 34 | 6.2% | 13.1% | 13.8% |
| Age 35 to 44 | 9.9% | 4.3% | 12.9% |
| Age 45 to 54 | 12.8% | 13.7% | 12.6% |
| Age 55 to 59 | 6.2% | 8.1% | 6.7% |
| Age 60 to 64 | 17.0% | 8.3% | 6.3% |
| Age 65 to 74 | 11.3% | 5.1% | 9.6% |
| Age 75 to 84 | 2.0% | 3.9% | 4.5% |
| Age 85 and over | 0.0% | 4.0% | 1.9% |
| space1 | | | |
| Race | | | |
| | Montegut, LA | Chauvin, LA | United States |
| White | 84.3% | 83.5% | 59.4% |
| Black | 0.0% | 0.3% | 12.2% |
| Asian | 0.0% | 0.0% | 5.6% |
| Native American | 12.9% | 6.1% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 2.8% | 3.9% | 3.2% |
| Hispanic | 0.0% | 6.3% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Montegut, LA | Chauvin, LA | United States |
| Married Population | 53.6% | 49.1% | 49.8% |
| Currently Married | 53.6% | 48.8% | 48.0% |
| Married but Separated | 0.0% | 0.3% | 1.8% |
| Single Population | 46.4% | 50.9% | 50.2% |
| Never Married | 24.7% | 29.4% | 33.8% |
| Divorced | 10.0% | 13.1% | 10.8% |
| Widowed | 11.7% | 8.4% | 5.6% |
| space5 | | | |
| Household Size | 2.61 | 2.97 | 2.60 |
| Households | 562 | 956 | 124,010,992 |
| Family Households | 348 | 731 | 80,755,759 |
| Married couple, w/children | 37.4% | 41.9% | 30.5% |
| Married couple, no children | 42.5% | 31.7% | 42.9% |
| Non Family Households | 214 | 225 | 43,255,233 |
| Single householder, w/children | 16.1% | 8.2% | 15.8% |
| Single householder, no children | 4.0% | 18.2% | 10.8% |