| | Peru, VT | Montague, MA | United States |
| Population | 457 | 8,565 | 329,725,481 |
| Female Population | 55.4% | 52.3% | 50.5% |
| Male Population | 44.6% | 47.7% | 49.5% |
| Median Age | 50 | 44.6 | 38.4 |
| space3 | | | |
| Population - 2010 | 372 | 8,459 | 309,327,143 |
| Population - 2000 | 416 | 8,489 | 285,036,114 |
| Population - 1990 | 324 | 8,316 | 251,960,433 |
| Pop. 2000 to Now | -14.7% | -3.4% | 15.6% |
| Pop. 1990 to Now | 9.6% | -1.4% | 30.8% |
| space4 | | | |
| Population Density | 12.3 | 283.9 | 93.4 |
| Land Area | 37.2 | 30.2 | 3,531,905.4 |
| Water Area | 0.1 | 1.3 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Peru, VT | Montague, MA | United States |
| Age 0 to 4 | 0.0% | 3.9% | 5.9% |
| Age 5 to 9 | 2.8% | 5.0% | 6.1% |
| Age 10 to 14 | 2.4% | 5.2% | 6.6% |
| Age 15 to 17 | 8.1% | 3.7% | 3.9% |
| Age 18 to 20 | 1.1% | 2.4% | 4.0% |
| Age 21 to 24 | 0.0% | 3.8% | 5.2% |
| Age 25 to 34 | 20.8% | 12.8% | 13.8% |
| Age 35 to 44 | 8.8% | 14.0% | 12.9% |
| Age 45 to 54 | 17.9% | 13.7% | 12.6% |
| Age 55 to 59 | 6.8% | 6.4% | 6.7% |
| Age 60 to 64 | 11.8% | 9.5% | 6.3% |
| Age 65 to 74 | 14.0% | 11.9% | 9.6% |
| Age 75 to 84 | 2.2% | 4.5% | 4.5% |
| Age 85 and over | 3.3% | 3.2% | 1.9% |
| space1 | | | |
| Race | | | |
| | Peru, VT | Montague, MA | United States |
| White | 95.4% | 90.2% | 59.4% |
| Black | 0.0% | 0.5% | 12.2% |
| Asian | 3.1% | 0.6% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.6% | 0.4% |
| Two or More Races | 0.9% | 3.8% | 3.2% |
| Hispanic | 0.7% | 4.4% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Peru, VT | Montague, MA | United States |
| Married Population | 68.8% | 44.9% | 49.8% |
| Currently Married | 68.8% | 43.5% | 48.0% |
| Married but Separated | 0.0% | 1.4% | 1.8% |
| Single Population | 31.2% | 55.1% | 50.2% |
| Never Married | 17.6% | 34.3% | 33.8% |
| Divorced | 8.8% | 14.4% | 10.8% |
| Widowed | 4.9% | 6.4% | 5.6% |
| space5 | | | |
| Household Size | 2.66 | 2.24 | 2.60 |
| Households | 172 | 3,765 | 124,010,992 |
| Family Households | 130 | 2,056 | 80,755,759 |
| Married couple, w/children | 20.0% | 23.7% | 30.5% |
| Married couple, no children | 68.5% | 51.2% | 42.9% |
| Non Family Households | 42 | 1,709 | 43,255,233 |
| Single householder, w/children | 2.3% | 17.1% | 15.8% |
| Single householder, no children | 9.2% | 8.0% | 10.8% |