| | Pearl River, LA | Kiln, MS | United States |
| Population | 2,577 | 2,277 | 329,725,481 |
| Female Population | 46.1% | 53.4% | 50.5% |
| Male Population | 53.9% | 46.6% | 49.5% |
| Median Age | 36.5 | 44.6 | 38.4 |
| space3 | | | |
| Population - 2010 | 2,423 | 1,822 | 309,327,143 |
| Population - 2000 | 1,839 | 2,040 | 285,036,114 |
| Population - 1990 | 1,507 | 1,262 | 251,960,433 |
| Pop. 2000 to Now | 42.4% | 2.6% | 15.6% |
| Pop. 1990 to Now | 73.7% | 65.8% | 30.8% |
| space4 | | | |
| Population Density | 699.3 | 173.0 | 93.4 |
| Land Area | 3.7 | 13.2 | 3,531,905.4 |
| Water Area | 0.1 | 0.3 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Pearl River, LA | Kiln, MS | United States |
| Age 0 to 4 | 4.2% | 8.6% | 5.9% |
| Age 5 to 9 | 9.2% | 6.6% | 6.1% |
| Age 10 to 14 | 11.3% | 2.8% | 6.6% |
| Age 15 to 17 | 2.8% | 0.0% | 3.9% |
| Age 18 to 20 | 2.8% | 11.6% | 4.0% |
| Age 21 to 24 | 4.5% | 5.5% | 5.2% |
| Age 25 to 34 | 14.4% | 6.5% | 13.8% |
| Age 35 to 44 | 8.1% | 9.5% | 12.9% |
| Age 45 to 54 | 11.8% | 10.1% | 12.6% |
| Age 55 to 59 | 7.0% | 9.8% | 6.7% |
| Age 60 to 64 | 8.7% | 1.6% | 6.3% |
| Age 65 to 74 | 8.9% | 12.6% | 9.6% |
| Age 75 to 84 | 5.1% | 12.6% | 4.5% |
| Age 85 and over | 1.1% | 2.2% | 1.9% |
| space1 | | | |
| Race | | | |
| | Pearl River, LA | Kiln, MS | United States |
| White | 94.1% | 89.9% | 59.4% |
| Black | 2.3% | 0.1% | 12.2% |
| Asian | 0.0% | 0.0% | 5.6% |
| Native American | 0.7% | 0.8% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 0.8% | 9.1% | 3.2% |
| Hispanic | 2.1% | 0.0% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Pearl River, LA | Kiln, MS | United States |
| Married Population | 55.9% | 53.6% | 49.8% |
| Currently Married | 54.5% | 51.8% | 48.0% |
| Married but Separated | 1.4% | 1.8% | 1.8% |
| Single Population | 44.1% | 46.4% | 50.2% |
| Never Married | 27.2% | 27.1% | 33.8% |
| Divorced | 13.7% | 6.8% | 10.8% |
| Widowed | 3.2% | 12.5% | 5.6% |
| space5 | | | |
| Household Size | 2.74 | 3.13 | 2.60 |
| Households | 939 | 726 | 124,010,992 |
| Family Households | 729 | 630 | 80,755,759 |
| Married couple, w/children | 26.5% | 26.5% | 30.5% |
| Married couple, no children | 46.9% | 43.3% | 42.9% |
| Non Family Households | 210 | 96 | 43,255,233 |
| Single householder, w/children | 21.0% | 13.2% | 15.8% |
| Single householder, no children | 5.6% | 17.0% | 10.8% |