| | Winchester, ID | Cascade, ID | United States |
| Population | 234 | 1,101 | 329,725,481 |
| Female Population | 42.3% | 52.3% | 50.5% |
| Male Population | 57.7% | 47.7% | 49.5% |
| Median Age | 52 | 53 | 38.4 |
| space3 | | | |
| Population - 2010 | 341 | 931 | 309,327,143 |
| Population - 2000 | 308 | 997 | 285,036,114 |
| Population - 1990 | 262 | 877 | 251,960,433 |
| Pop. 2000 to Now | 44.2% | 5.6% | 15.6% |
| Pop. 1990 to Now | 69.5% | 20.1% | 30.8% |
| space4 | | | |
| Population Density | 1,368.4 | 267.6 | 93.4 |
| Land Area | 0.2 | 4.1 | 3,531,905.4 |
| Water Area | 0.0 | 0.6 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Winchester, ID | Cascade, ID | United States |
| Age 0 to 4 | 3.0% | 6.9% | 5.9% |
| Age 5 to 9 | 1.7% | 3.5% | 6.1% |
| Age 10 to 14 | 7.3% | 3.1% | 6.6% |
| Age 15 to 17 | 3.4% | 3.2% | 3.9% |
| Age 18 to 20 | 2.6% | 10.4% | 4.0% |
| Age 21 to 24 | 2.6% | 0.0% | 5.2% |
| Age 25 to 34 | 12.0% | 3.5% | 13.8% |
| Age 35 to 44 | 8.5% | 7.2% | 12.9% |
| Age 45 to 54 | 12.4% | 18.9% | 12.6% |
| Age 55 to 59 | 6.4% | 6.5% | 6.7% |
| Age 60 to 64 | 7.7% | 4.3% | 6.3% |
| Age 65 to 74 | 17.1% | 21.9% | 9.6% |
| Age 75 to 84 | 9.4% | 6.6% | 4.5% |
| Age 85 and over | 6.0% | 4.1% | 1.9% |
| space1 | | | |
| Race | | | |
| | Winchester, ID | Cascade, ID | United States |
| White | 91.0% | 87.7% | 59.4% |
| Black | 0.9% | 0.4% | 12.2% |
| Asian | 0.0% | 0.0% | 5.6% |
| Native American | 2.6% | 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% | 0.6% | 3.2% |
| Hispanic | 4.3% | 11.3% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Winchester, ID | Cascade, ID | United States |
| Married Population | 56.8% | 48.4% | 49.8% |
| Currently Married | 54.4% | 48.3% | 48.0% |
| Married but Separated | 2.4% | 0.1% | 1.8% |
| Single Population | 43.2% | 51.6% | 50.2% |
| Never Married | 12.6% | 23.5% | 33.8% |
| Divorced | 19.4% | 18.5% | 10.8% |
| Widowed | 11.2% | 9.6% | 5.6% |
| space5 | | | |
| Household Size | 2.02 | 3.15 | 2.60 |
| Households | 109 | 329 | 124,010,992 |
| Family Households | 65 | 197 | 80,755,759 |
| Married couple, w/children | 29.2% | 17.8% | 30.5% |
| Married couple, no children | 56.9% | 76.7% | 42.9% |
| Non Family Households | 44 | 132 | 43,255,233 |
| Single householder, w/children | 6.2% | 3.0% | 15.8% |
| Single householder, no children | 7.7% | 2.5% | 10.8% |