| | Water Valley, MS | Eastport, ME | United States |
| Population | 3,343 | 1,226 | 329,725,481 |
| Female Population | 56.2% | 57.7% | 50.5% |
| Male Population | 43.8% | 42.3% | 49.5% |
| Median Age | 35.8 | 62.4 | 38.4 |
| space3 | | | |
| Population - 2010 | 3,377 | 1,329 | 309,327,143 |
| Population - 2000 | 3,677 | 1,640 | 285,036,114 |
| Population - 1990 | 3,610 | 1,965 | 251,960,433 |
| Pop. 2000 to Now | -12.4% | -22.3% | 15.6% |
| Pop. 1990 to Now | -10.8% | -35.1% | 30.8% |
| space4 | | | |
| Population Density | 477.0 | 337.3 | 93.4 |
| Land Area | 7.0 | 3.6 | 3,531,905.4 |
| Water Area | 0.0 | 8.7 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Water Valley, MS | Eastport, ME | United States |
| Age 0 to 4 | 9.9% | 3.0% | 5.9% |
| Age 5 to 9 | 7.4% | 5.0% | 6.1% |
| Age 10 to 14 | 3.5% | 4.2% | 6.6% |
| Age 15 to 17 | 4.0% | 3.1% | 3.9% |
| Age 18 to 20 | 4.5% | 1.4% | 4.0% |
| Age 21 to 24 | 3.2% | 1.3% | 5.2% |
| Age 25 to 34 | 16.3% | 7.3% | 13.8% |
| Age 35 to 44 | 15.0% | 6.9% | 12.9% |
| Age 45 to 54 | 6.9% | 7.9% | 12.6% |
| Age 55 to 59 | 3.7% | 5.1% | 6.7% |
| Age 60 to 64 | 5.2% | 13.2% | 6.3% |
| Age 65 to 74 | 12.7% | 26.8% | 9.6% |
| Age 75 to 84 | 5.2% | 10.0% | 4.5% |
| Age 85 and over | 2.5% | 4.8% | 1.9% |
| space1 | | | |
| Race | | | |
| | Water Valley, MS | Eastport, ME | United States |
| White | 48.4% | 90.2% | 59.4% |
| Black | 50.1% | 1.3% | 12.2% |
| Asian | 0.0% | 0.0% | 5.6% |
| Native American | 0.0% | 2.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 0.4% | 5.1% | 3.2% |
| Hispanic | 1.1% | 1.4% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Water Valley, MS | Eastport, ME | United States |
| Married Population | 35.6% | 52.0% | 49.8% |
| Currently Married | 33.6% | 51.1% | 48.0% |
| Married but Separated | 2.0% | 0.8% | 1.8% |
| Single Population | 64.4% | 48.0% | 50.2% |
| Never Married | 44.2% | 18.8% | 33.8% |
| Divorced | 10.6% | 19.2% | 10.8% |
| Widowed | 9.6% | 10.0% | 5.6% |
| space5 | | | |
| Household Size | 2.67 | 1.97 | 2.60 |
| Households | 1,197 | 599 | 124,010,992 |
| Family Households | 821 | 330 | 80,755,759 |
| Married couple, w/children | 16.8% | 13.0% | 30.5% |
| Married couple, no children | 35.2% | 70.3% | 42.9% |
| Non Family Households | 376 | 269 | 43,255,233 |
| Single householder, w/children | 32.8% | 15.2% | 15.8% |
| Single householder, no children | 15.2% | 1.5% | 10.8% |