| | Rochester, VT | Barre, VT | United States |
| Population | 1,250 | 8,514 | 329,725,481 |
| Female Population | 52.0% | 51.4% | 50.5% |
| Male Population | 48.0% | 48.6% | 49.5% |
| Median Age | 57.2 | 40.3 | 38.4 |
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| Population - 2010 | 1,136 | 9,050 | 309,327,143 |
| Population - 2000 | 1,171 | 9,291 | 285,036,114 |
| Population - 1990 | 1,181 | 9,482 | 251,960,433 |
| Pop. 2000 to Now | -7.3% | -8.8% | 15.6% |
| Pop. 1990 to Now | -8.1% | -10.6% | 30.8% |
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| Population Density | 21.9 | 2,157.1 | 93.4 |
| Land Area | 57.1 | 3.9 | 3,531,905.4 |
| Water Area | 0.3 | 0.0 | 264,836.8 |
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| Est. Total Population By Age | | | |
| | Rochester, VT | Barre, VT | United States |
| Age 0 to 4 | 0.3% | 4.3% | 5.9% |
| Age 5 to 9 | 1.6% | 5.7% | 6.1% |
| Age 10 to 14 | 3.4% | 7.0% | 6.6% |
| Age 15 to 17 | 3.0% | 4.8% | 3.9% |
| Age 18 to 20 | 0.0% | 3.2% | 4.0% |
| Age 21 to 24 | 2.2% | 4.8% | 5.2% |
| Age 25 to 34 | 3.4% | 12.5% | 13.8% |
| Age 35 to 44 | 6.8% | 15.8% | 12.9% |
| Age 45 to 54 | 26.1% | 11.0% | 12.6% |
| Age 55 to 59 | 7.8% | 10.7% | 6.7% |
| Age 60 to 64 | 6.6% | 7.1% | 6.3% |
| Age 65 to 74 | 24.8% | 7.7% | 9.6% |
| Age 75 to 84 | 8.9% | 3.3% | 4.5% |
| Age 85 and over | 5.0% | 2.2% | 1.9% |
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| Race | | | |
| | Rochester, VT | Barre, VT | United States |
| White | 98.5% | 93.1% | 59.4% |
| Black | 0.0% | 0.7% | 12.2% |
| Asian | 0.4% | 0.7% | 5.6% |
| Native American | 0.2% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.1% | 0.4% |
| Two or More Races | 0.5% | 3.4% | 3.2% |
| Hispanic | 0.5% | 1.9% | 18.4% |
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| Marriage & Family | | | |
| | Rochester, VT | Barre, VT | United States |
| Married Population | 45.4% | 34.0% | 49.8% |
| Currently Married | 42.9% | 32.0% | 48.0% |
| Married but Separated | 2.5% | 2.0% | 1.8% |
| Single Population | 54.6% | 66.0% | 50.2% |
| Never Married | 26.4% | 40.3% | 33.8% |
| Divorced | 17.6% | 19.9% | 10.8% |
| Widowed | 10.6% | 5.8% | 5.6% |
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| Household Size | 1.80 | 2.15 | 2.60 |
| Households | 684 | 3,880 | 124,010,992 |
| Family Households | 284 | 1,947 | 80,755,759 |
| Married couple, w/children | 14.4% | 19.6% | 30.5% |
| Married couple, no children | 72.9% | 34.6% | 42.9% |
| Non Family Households | 400 | 1,933 | 43,255,233 |
| Single householder, w/children | 3.2% | 28.7% | 15.8% |
| Single householder, no children | 9.5% | 17.1% | 10.8% |