| | Doniphan, MO | DeQuincy, LA | United States |
| Population | 1,929 | 3,120 | 329,725,481 |
| Female Population | 59.4% | 46.4% | 50.5% |
| Male Population | 40.6% | 53.6% | 49.5% |
| Median Age | 41.6 | 27.2 | 38.4 |
| space3 | | | |
| Population - 2010 | 2,000 | 3,228 | 309,327,143 |
| Population - 2000 | 1,932 | 3,398 | 285,036,114 |
| Population - 1990 | 1,713 | 3,474 | 251,960,433 |
| Pop. 2000 to Now | -0.7% | -11.5% | 15.6% |
| Pop. 1990 to Now | 12.0% | -13.4% | 30.8% |
| space4 | | | |
| Population Density | 1,401.9 | 979.9 | 93.4 |
| Land Area | 1.4 | 3.2 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Doniphan, MO | DeQuincy, LA | United States |
| Age 0 to 4 | 4.5% | 11.6% | 5.9% |
| Age 5 to 9 | 11.2% | 7.5% | 6.1% |
| Age 10 to 14 | 5.2% | 5.6% | 6.6% |
| Age 15 to 17 | 2.4% | 8.8% | 3.9% |
| Age 18 to 20 | 2.9% | 3.1% | 4.0% |
| Age 21 to 24 | 1.5% | 9.4% | 5.2% |
| Age 25 to 34 | 15.4% | 9.2% | 13.8% |
| Age 35 to 44 | 10.3% | 13.1% | 12.9% |
| Age 45 to 54 | 12.9% | 9.6% | 12.6% |
| Age 55 to 59 | 6.2% | 3.3% | 6.7% |
| Age 60 to 64 | 8.2% | 3.2% | 6.3% |
| Age 65 to 74 | 9.8% | 11.8% | 9.6% |
| Age 75 to 84 | 6.0% | 3.3% | 4.5% |
| Age 85 and over | 3.6% | 0.4% | 1.9% |
| space1 | | | |
| Race | | | |
| | Doniphan, MO | DeQuincy, LA | United States |
| White | 88.9% | 78.1% | 59.4% |
| Black | 0.0% | 9.4% | 12.2% |
| Asian | 1.7% | 0.0% | 5.6% |
| Native American | 0.6% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.5% | 0.0% | 0.4% |
| Two or More Races | 4.1% | 9.7% | 3.2% |
| Hispanic | 4.1% | 2.8% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Doniphan, MO | DeQuincy, LA | United States |
| Married Population | 41.9% | 34.7% | 49.8% |
| Currently Married | 39.5% | 27.2% | 48.0% |
| Married but Separated | 2.4% | 7.5% | 1.8% |
| Single Population | 58.1% | 65.3% | 50.2% |
| Never Married | 22.8% | 43.2% | 33.8% |
| Divorced | 20.9% | 12.6% | 10.8% |
| Widowed | 14.4% | 9.5% | 5.6% |
| space5 | | | |
| Household Size | 2.81 | 3.57 | 2.60 |
| Households | 672 | 859 | 124,010,992 |
| Family Households | 387 | 565 | 80,755,759 |
| Married couple, w/children | 31.5% | 27.3% | 30.5% |
| Married couple, no children | 38.2% | 22.3% | 42.9% |
| Non Family Households | 285 | 294 | 43,255,233 |
| Single householder, w/children | 13.2% | 31.5% | 15.8% |
| Single householder, no children | 17.1% | 18.9% | 10.8% |