| | Guernsey, WY | Parachute, CO | United States |
| Population | 1,016 | 1,607 | 329,725,481 |
| Female Population | 45.8% | 40.8% | 50.5% |
| Male Population | 54.2% | 59.2% | 49.5% |
| Median Age | 47.5 | 28.5 | 38.4 |
| space3 | | | |
| Population - 2010 | 1,146 | 1,074 | 309,327,143 |
| Population - 2000 | 1,147 | 1,006 | 285,036,114 |
| Population - 1990 | 1,155 | 658 | 251,960,433 |
| Pop. 2000 to Now | -0.4% | 10.7% | 15.6% |
| Pop. 1990 to Now | -1.0% | 69.3% | 30.8% |
| space4 | | | |
| Population Density | 991.2 | 999.4 | 93.4 |
| Land Area | 1.0 | 1.6 | 3,531,905.4 |
| Water Area | 0.0 | 0.1 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Guernsey, WY | Parachute, CO | United States |
| Age 0 to 4 | 8.8% | 8.8% | 5.9% |
| Age 5 to 9 | 9.2% | 7.0% | 6.1% |
| Age 10 to 14 | 5.5% | 7.2% | 6.6% |
| Age 15 to 17 | 3.7% | 9.3% | 3.9% |
| Age 18 to 20 | 0.4% | 6.8% | 4.0% |
| Age 21 to 24 | 1.7% | 7.1% | 5.2% |
| Age 25 to 34 | 10.7% | 10.9% | 13.8% |
| Age 35 to 44 | 7.9% | 15.1% | 12.9% |
| Age 45 to 54 | 9.8% | 9.6% | 12.6% |
| Age 55 to 59 | 8.9% | 4.9% | 6.7% |
| Age 60 to 64 | 6.7% | 3.5% | 6.3% |
| Age 65 to 74 | 13.3% | 7.8% | 9.6% |
| Age 75 to 84 | 10.1% | 2.0% | 4.5% |
| Age 85 and over | 3.3% | 0.1% | 1.9% |
| space1 | | | |
| Race | | | |
| | Guernsey, WY | Parachute, CO | United States |
| White | 90.0% | 74.2% | 59.4% |
| Black | 0.0% | 1.5% | 12.2% |
| Asian | 0.0% | 0.8% | 5.6% |
| Native American | 0.0% | 4.4% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 7.8% | 1.9% | 3.2% |
| Hispanic | 2.3% | 17.2% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Guernsey, WY | Parachute, CO | United States |
| Married Population | 71.1% | 48.6% | 49.8% |
| Currently Married | 70.4% | 47.2% | 48.0% |
| Married but Separated | 0.6% | 1.5% | 1.8% |
| Single Population | 28.9% | 51.4% | 50.2% |
| Never Married | 13.6% | 37.7% | 33.8% |
| Divorced | 8.4% | 12.0% | 10.8% |
| Widowed | 6.9% | 1.7% | 5.6% |
| space5 | | | |
| Household Size | 2.36 | 2.99 | 2.60 |
| Households | 431 | 531 | 124,010,992 |
| Family Households | 287 | 398 | 80,755,759 |
| Married couple, w/children | 26.8% | 32.2% | 30.5% |
| Married couple, no children | 68.6% | 36.2% | 42.9% |
| Non Family Households | 144 | 133 | 43,255,233 |
| Single householder, w/children | 4.5% | 29.6% | 15.8% |
| Single householder, no children | 0.0% | 2.0% | 10.8% |