| | Millinocket, ME | Princeton, WV | United States |
| Population | 4,127 | 5,885 | 329,725,481 |
| Female Population | 54.3% | 49.0% | 50.5% |
| Male Population | 45.8% | 51.0% | 49.5% |
| Median Age | 57.4 | 43.6 | 38.4 |
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| Population - 2010 | 4,499 | 6,108 | 309,327,143 |
| Population - 2000 | 5,203 | 6,347 | 285,036,114 |
| Population - 1990 | 6,956 | 7,043 | 251,960,433 |
| Pop. 2000 to Now | -18.4% | -11.8% | 15.6% |
| Pop. 1990 to Now | -39.0% | -20.5% | 30.8% |
| space4 | | | |
| Population Density | 258.8 | 1,952.6 | 93.4 |
| Land Area | 15.9 | 3.0 | 3,531,905.4 |
| Water Area | 2.3 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Millinocket, ME | Princeton, WV | United States |
| Age 0 to 4 | 2.9% | 5.4% | 5.9% |
| Age 5 to 9 | 8.7% | 8.2% | 6.1% |
| Age 10 to 14 | 0.9% | 3.4% | 6.6% |
| Age 15 to 17 | 2.4% | 3.3% | 3.9% |
| Age 18 to 20 | 3.2% | 3.2% | 4.0% |
| Age 21 to 24 | 1.4% | 4.4% | 5.2% |
| Age 25 to 34 | 11.5% | 14.4% | 13.8% |
| Age 35 to 44 | 6.6% | 10.1% | 12.9% |
| Age 45 to 54 | 9.2% | 14.3% | 12.6% |
| Age 55 to 59 | 8.0% | 4.5% | 6.7% |
| Age 60 to 64 | 9.4% | 5.4% | 6.3% |
| Age 65 to 74 | 21.9% | 13.1% | 9.6% |
| Age 75 to 84 | 11.7% | 5.2% | 4.5% |
| Age 85 and over | 2.2% | 5.1% | 1.9% |
| space1 | | | |
| Race | | | |
| | Millinocket, ME | Princeton, WV | United States |
| White | 99.7% | 88.8% | 59.4% |
| Black | 0.0% | 6.1% | 12.2% |
| Asian | 0.0% | 0.4% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 0.3% | 4.0% | 3.2% |
| Hispanic | 0.0% | 0.6% | 18.4% |
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| Marriage & Family | | | |
| | Millinocket, ME | Princeton, WV | United States |
| Married Population | 56.2% | 44.8% | 49.8% |
| Currently Married | 54.2% | 42.2% | 48.0% |
| Married but Separated | 2.1% | 2.6% | 1.8% |
| Single Population | 43.8% | 55.2% | 50.2% |
| Never Married | 16.5% | 29.9% | 33.8% |
| Divorced | 19.2% | 15.5% | 10.8% |
| Widowed | 8.1% | 9.7% | 5.6% |
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| Household Size | 1.89 | 2.26 | 2.60 |
| Households | 2,164 | 2,600 | 124,010,992 |
| Family Households | 1,262 | 1,586 | 80,755,759 |
| Married couple, w/children | 13.1% | 21.9% | 30.5% |
| Married couple, no children | 64.1% | 41.5% | 42.9% |
| Non Family Households | 902 | 1,014 | 43,255,233 |
| Single householder, w/children | 21.8% | 26.7% | 15.8% |
| Single householder, no children | 1.0% | 9.8% | 10.8% |