| | Pierce, CO | Clifton, CO | United States |
| Population | 1,019 | 20,122 | 329,725,481 |
| Female Population | 53.4% | 50.2% | 50.5% |
| Male Population | 46.6% | 49.8% | 49.5% |
| Median Age | 35.4 | 33.6 | 38.4 |
| space3 | | | |
| Population - 2010 | 834 | 19,985 | 309,327,143 |
| Population - 2000 | 884 | 17,345 | 285,036,114 |
| Population - 1990 | 823 | 12,671 | 251,960,433 |
| Pop. 2000 to Now | 6.1% | 21.4% | 15.6% |
| Pop. 1990 to Now | 14.0% | 66.1% | 30.8% |
| space4 | | | |
| Population Density | 1,214.5 | 3,327.1 | 93.4 |
| Land Area | 0.8 | 6.0 | 3,531,905.4 |
| Water Area | 0.0 | 0.1 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Pierce, CO | Clifton, CO | United States |
| Age 0 to 4 | 9.7% | 6.3% | 5.9% |
| Age 5 to 9 | 4.4% | 10.1% | 6.1% |
| Age 10 to 14 | 6.1% | 5.1% | 6.6% |
| Age 15 to 17 | 4.4% | 4.0% | 3.9% |
| Age 18 to 20 | 2.7% | 3.9% | 4.0% |
| Age 21 to 24 | 7.2% | 5.9% | 5.2% |
| Age 25 to 34 | 15.1% | 16.3% | 13.8% |
| Age 35 to 44 | 10.3% | 12.3% | 12.9% |
| Age 45 to 54 | 12.8% | 11.0% | 12.6% |
| Age 55 to 59 | 7.3% | 5.0% | 6.7% |
| Age 60 to 64 | 4.9% | 5.8% | 6.3% |
| Age 65 to 74 | 11.4% | 9.0% | 9.6% |
| Age 75 to 84 | 2.4% | 3.6% | 4.5% |
| Age 85 and over | 1.4% | 1.6% | 1.9% |
| space1 | | | |
| Race | | | |
| | Pierce, CO | Clifton, CO | United States |
| White | 79.2% | 69.5% | 59.4% |
| Black | 0.0% | 0.1% | 12.2% |
| Asian | 1.0% | 1.1% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.5% | 0.4% |
| Two or More Races | 5.4% | 2.5% | 3.2% |
| Hispanic | 14.4% | 26.2% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Pierce, CO | Clifton, CO | United States |
| Married Population | 61.4% | 46.4% | 49.8% |
| Currently Married | 60.6% | 44.9% | 48.0% |
| Married but Separated | 0.7% | 1.5% | 1.8% |
| Single Population | 38.6% | 53.6% | 50.2% |
| Never Married | 26.2% | 31.8% | 33.8% |
| Divorced | 4.8% | 16.2% | 10.8% |
| Widowed | 7.6% | 5.6% | 5.6% |
| space5 | | | |
| Household Size | 2.54 | 2.67 | 2.60 |
| Households | 401 | 7,527 | 124,010,992 |
| Family Households | 264 | 4,819 | 80,755,759 |
| Married couple, w/children | 36.7% | 31.2% | 30.5% |
| Married couple, no children | 54.5% | 35.5% | 42.9% |
| Non Family Households | 137 | 2,708 | 43,255,233 |
| Single householder, w/children | 8.7% | 20.6% | 15.8% |
| Single householder, no children | 0.0% | 12.7% | 10.8% |