| | Poca, WV | Clarksburg, MA | United States |
| Population | 906 | 1,750 | 329,725,481 |
| Female Population | 49.5% | 47.2% | 50.5% |
| Male Population | 50.6% | 52.8% | 49.5% |
| Median Age | 42.1 | 45.8 | 38.4 |
| space3 | | | |
| Population - 2010 | 965 | 1,701 | 309,327,143 |
| Population - 2000 | 1,013 | 1,686 | 285,036,114 |
| Population - 1990 | 1,124 | 1,745 | 251,960,433 |
| Pop. 2000 to Now | -4.9% | -3.6% | 15.6% |
| Pop. 1990 to Now | -14.3% | -6.9% | 30.8% |
| space4 | | | |
| Population Density | 1,543.4 | 137.9 | 93.4 |
| Land Area | 0.6 | 12.7 | 3,531,905.4 |
| Water Area | 0.2 | 0.1 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Poca, WV | Clarksburg, MA | United States |
| Age 0 to 4 | 2.2% | 1.6% | 5.9% |
| Age 5 to 9 | 3.3% | 7.0% | 6.1% |
| Age 10 to 14 | 11.9% | 7.8% | 6.6% |
| Age 15 to 17 | 7.4% | 2.7% | 3.9% |
| Age 18 to 20 | 0.3% | 1.9% | 4.0% |
| Age 21 to 24 | 2.2% | 7.1% | 5.2% |
| Age 25 to 34 | 8.2% | 8.3% | 13.8% |
| Age 35 to 44 | 18.5% | 11.7% | 12.9% |
| Age 45 to 54 | 13.7% | 12.2% | 12.6% |
| Age 55 to 59 | 5.1% | 7.7% | 6.7% |
| Age 60 to 64 | 7.1% | 7.7% | 6.3% |
| Age 65 to 74 | 10.9% | 13.2% | 9.6% |
| Age 75 to 84 | 4.6% | 8.1% | 4.5% |
| Age 85 and over | 4.5% | 3.1% | 1.9% |
| space1 | | | |
| Race | | | |
| | Poca, WV | Clarksburg, MA | United States |
| White | 98.7% | 92.5% | 59.4% |
| Black | 0.0% | 1.3% | 12.2% |
| Asian | 0.0% | 0.0% | 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 | 1.3% | 3.5% | 3.2% |
| Hispanic | 0.0% | 2.8% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Poca, WV | Clarksburg, MA | United States |
| Married Population | 53.5% | 49.6% | 49.8% |
| Currently Married | 50.8% | 47.9% | 48.0% |
| Married but Separated | 2.7% | 1.6% | 1.8% |
| Single Population | 46.5% | 50.4% | 50.2% |
| Never Married | 17.9% | 29.8% | 33.8% |
| Divorced | 20.1% | 12.5% | 10.8% |
| Widowed | 8.6% | 8.1% | 5.6% |
| space5 | | | |
| Household Size | 2.38 | 2.39 | 2.60 |
| Households | 380 | 729 | 124,010,992 |
| Family Households | 295 | 482 | 80,755,759 |
| Married couple, w/children | 29.5% | 20.3% | 30.5% |
| Married couple, no children | 36.3% | 52.1% | 42.9% |
| Non Family Households | 85 | 247 | 43,255,233 |
| Single householder, w/children | 24.7% | 14.9% | 15.8% |
| Single householder, no children | 9.5% | 12.7% | 10.8% |