| | Allenspark, CO | Lyons, CO | United States |
| Population | 574 | 2,261 | 329,725,481 |
| Female Population | 48.3% | 49.6% | 50.5% |
| Male Population | 51.7% | 50.4% | 49.5% |
| Median Age | 54.5 | 46.4 | 38.4 |
| space3 | | | |
| Population - 2010 | 459 | 2,122 | 309,327,143 |
| Population - 2000 | 496 | 1,585 | 285,036,114 |
| Population - 1990 | 363 | 1,227 | 251,960,433 |
| Pop. 2000 to Now | 4.2% | 29.8% | 15.6% |
| Pop. 1990 to Now | 42.4% | 67.7% | 30.8% |
| space4 | | | |
| Population Density | 48.1 | 1,679.8 | 93.4 |
| Land Area | 11.9 | 1.3 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Allenspark, CO | Lyons, CO | United States |
| Age 0 to 4 | 0.2% | 2.7% | 5.9% |
| Age 5 to 9 | 3.1% | 7.3% | 6.1% |
| Age 10 to 14 | 6.6% | 11.2% | 6.6% |
| Age 15 to 17 | 5.1% | 5.0% | 3.9% |
| Age 18 to 20 | 0.0% | 3.5% | 4.0% |
| Age 21 to 24 | 2.4% | 0.6% | 5.2% |
| Age 25 to 34 | 11.8% | 3.0% | 13.8% |
| Age 35 to 44 | 3.7% | 15.9% | 12.9% |
| Age 45 to 54 | 21.4% | 21.5% | 12.6% |
| Age 55 to 59 | 9.8% | 9.2% | 6.7% |
| Age 60 to 64 | 12.7% | 8.8% | 6.3% |
| Age 65 to 74 | 17.4% | 7.2% | 9.6% |
| Age 75 to 84 | 4.9% | 3.8% | 4.5% |
| Age 85 and over | 0.9% | 0.4% | 1.9% |
| space1 | | | |
| Race | | | |
| | Allenspark, CO | Lyons, CO | United States |
| White | 93.7% | 91.2% | 59.4% |
| Black | 0.3% | 1.0% | 12.2% |
| Asian | 0.0% | 0.8% | 5.6% |
| Native American | 0.0% | 0.8% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 2.4% | 1.8% | 3.2% |
| Hispanic | 3.5% | 4.4% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Allenspark, CO | Lyons, CO | United States |
| Married Population | 62.7% | 58.4% | 49.8% |
| Currently Married | 61.9% | 57.7% | 48.0% |
| Married but Separated | 0.8% | 0.6% | 1.8% |
| Single Population | 37.3% | 41.6% | 50.2% |
| Never Married | 27.7% | 22.2% | 33.8% |
| Divorced | 5.6% | 16.8% | 10.8% |
| Widowed | 4.1% | 2.6% | 5.6% |
| space5 | | | |
| Household Size | 2.36 | 2.58 | 2.60 |
| Households | 240 | 875 | 124,010,992 |
| Family Households | 159 | 550 | 80,755,759 |
| Married couple, w/children | 32.1% | 49.6% | 30.5% |
| Married couple, no children | 64.8% | 42.2% | 42.9% |
| Non Family Households | 81 | 325 | 43,255,233 |
| Single householder, w/children | 0.0% | 6.5% | 15.8% |
| Single householder, no children | 3.1% | 1.6% | 10.8% |