| | DeRidder, LA | North Liberty, IA | United States |
| Population | 10,060 | 19,976 | 329,725,481 |
| Female Population | 49.1% | 51.0% | 50.5% |
| Male Population | 50.9% | 49.0% | 49.5% |
| Median Age | 36.8 | 31.8 | 38.4 |
| space3 | | | |
| Population - 2010 | 10,620 | 13,648 | 309,327,143 |
| Population - 2000 | 9,808 | 5,367 | 285,036,114 |
| Population - 1990 | 9,868 | 2,926 | 251,960,433 |
| Pop. 2000 to Now | 7.3% | 267.7% | 15.6% |
| Pop. 1990 to Now | 6.6% | 574.5% | 30.8% |
| space4 | | | |
| Population Density | 1,089.9 | 2,263.1 | 93.4 |
| Land Area | 9.2 | 8.8 | 3,531,905.4 |
| Water Area | 0.1 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | DeRidder, LA | North Liberty, IA | United States |
| Age 0 to 4 | 6.2% | 9.1% | 5.9% |
| Age 5 to 9 | 6.7% | 11.2% | 6.1% |
| Age 10 to 14 | 6.1% | 8.1% | 6.6% |
| Age 15 to 17 | 4.8% | 3.5% | 3.9% |
| Age 18 to 20 | 3.2% | 0.9% | 4.0% |
| Age 21 to 24 | 3.7% | 4.9% | 5.2% |
| Age 25 to 34 | 17.4% | 18.6% | 13.8% |
| Age 35 to 44 | 10.7% | 20.7% | 12.9% |
| Age 45 to 54 | 12.3% | 10.5% | 12.6% |
| Age 55 to 59 | 8.0% | 2.4% | 6.7% |
| Age 60 to 64 | 4.9% | 3.5% | 6.3% |
| Age 65 to 74 | 9.8% | 3.0% | 9.6% |
| Age 75 to 84 | 4.1% | 2.5% | 4.5% |
| Age 85 and over | 2.0% | 1.0% | 1.9% |
| space1 | | | |
| Race | | | |
| | DeRidder, LA | North Liberty, IA | United States |
| White | 45.6% | 79.4% | 59.4% |
| Black | 35.8% | 5.1% | 12.2% |
| Asian | 1.1% | 4.4% | 5.6% |
| Native American | 0.1% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.1% | 0.2% | 0.2% |
| Other | 2.2% | 0.0% | 0.4% |
| Two or More Races | 6.9% | 5.2% | 3.2% |
| Hispanic | 8.2% | 5.6% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | DeRidder, LA | North Liberty, IA | United States |
| Married Population | 44.8% | 60.5% | 49.8% |
| Currently Married | 41.3% | 59.2% | 48.0% |
| Married but Separated | 3.5% | 1.2% | 1.8% |
| Single Population | 55.2% | 39.5% | 50.2% |
| Never Married | 34.3% | 28.8% | 33.8% |
| Divorced | 14.4% | 7.6% | 10.8% |
| Widowed | 6.6% | 3.1% | 5.6% |
| space5 | | | |
| Household Size | 2.49 | 2.75 | 2.60 |
| Households | 3,895 | 7,276 | 124,010,992 |
| Family Households | 2,590 | 4,998 | 80,755,759 |
| Married couple, w/children | 21.1% | 57.8% | 30.5% |
| Married couple, no children | 42.3% | 27.9% | 42.9% |
| Non Family Households | 1,305 | 2,278 | 43,255,233 |
| Single householder, w/children | 24.1% | 8.5% | 15.8% |
| Single householder, no children | 12.4% | 5.8% | 10.8% |