| | Prospect, CT | Beacon Falls, CT | United States |
| Population | 9,361 | 6,027 | 329,725,481 |
| Female Population | 50.8% | 47.5% | 50.5% |
| Male Population | 49.2% | 52.5% | 49.5% |
| Median Age | 47.4 | 50.6 | 38.4 |
| space3 | | | |
| Population - 2010 | 9,451 | 6,074 | 309,327,143 |
| Population - 2000 | 8,707 | 5,246 | 285,036,114 |
| Population - 1990 | 7,775 | 5,083 | 251,960,433 |
| Pop. 2000 to Now | 12.0% | 18.8% | 15.6% |
| Pop. 1990 to Now | 25.5% | 22.6% | 30.8% |
| space4 | | | |
| Population Density | 657.1 | 623.0 | 93.4 |
| Land Area | 14.2 | 9.7 | 3,531,905.4 |
| Water Area | 0.2 | 0.1 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Prospect, CT | Beacon Falls, CT | United States |
| Age 0 to 4 | 3.6% | 3.3% | 5.9% |
| Age 5 to 9 | 5.3% | 2.9% | 6.1% |
| Age 10 to 14 | 8.1% | 6.0% | 6.6% |
| Age 15 to 17 | 4.3% | 6.0% | 3.9% |
| Age 18 to 20 | 1.9% | 2.0% | 4.0% |
| Age 21 to 24 | 3.9% | 4.4% | 5.2% |
| Age 25 to 34 | 5.9% | 8.9% | 13.8% |
| Age 35 to 44 | 12.0% | 8.8% | 12.9% |
| Age 45 to 54 | 14.9% | 13.3% | 12.6% |
| Age 55 to 59 | 10.5% | 9.7% | 6.7% |
| Age 60 to 64 | 7.6% | 11.6% | 6.3% |
| Age 65 to 74 | 12.6% | 16.6% | 9.6% |
| Age 75 to 84 | 5.4% | 5.4% | 4.5% |
| Age 85 and over | 3.9% | 1.1% | 1.9% |
| space1 | | | |
| Race | | | |
| | Prospect, CT | Beacon Falls, CT | United States |
| White | 89.4% | 92.9% | 59.4% |
| Black | 3.2% | 0.7% | 12.2% |
| Asian | 0.3% | 0.6% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 3.3% | 0.6% | 3.2% |
| Hispanic | 3.9% | 5.2% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Prospect, CT | Beacon Falls, CT | United States |
| Married Population | 61.0% | 46.8% | 49.8% |
| Currently Married | 60.8% | 46.4% | 48.0% |
| Married but Separated | 0.2% | 0.3% | 1.8% |
| Single Population | 39.0% | 53.2% | 50.2% |
| Never Married | 21.7% | 27.2% | 33.8% |
| Divorced | 8.4% | 20.9% | 10.8% |
| Widowed | 9.0% | 5.2% | 5.6% |
| space5 | | | |
| Household Size | 2.85 | 2.29 | 2.60 |
| Households | 3,238 | 2,631 | 124,010,992 |
| Family Households | 2,467 | 1,640 | 80,755,759 |
| Married couple, w/children | 32.8% | 22.1% | 30.5% |
| Married couple, no children | 53.2% | 52.7% | 42.9% |
| Non Family Households | 771 | 991 | 43,255,233 |
| Single householder, w/children | 6.4% | 13.6% | 15.8% |
| Single householder, no children | 7.6% | 11.6% | 10.8% |