| | Mancos, CO | Westcliffe, CO | United States |
| Population | 1,168 | 403 | 329,725,481 |
| Female Population | 49.7% | 54.1% | 50.5% |
| Male Population | 50.3% | 45.9% | 49.5% |
| Median Age | 40.3 | 54.3 | 38.4 |
| space3 | | | |
| Population - 2010 | 1,341 | 575 | 309,327,143 |
| Population - 2000 | 1,119 | 417 | 285,036,114 |
| Population - 1990 | 842 | 312 | 251,960,433 |
| Pop. 2000 to Now | 24.9% | 66.0% | 15.6% |
| Pop. 1990 to Now | 66.0% | 121.8% | 30.8% |
| space4 | | | |
| Population Density | 1,830.7 | 326.3 | 93.4 |
| Land Area | 0.6 | 1.2 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Mancos, CO | Westcliffe, CO | United States |
| Age 0 to 4 | 6.5% | 1.0% | 5.9% |
| Age 5 to 9 | 7.7% | 0.7% | 6.1% |
| Age 10 to 14 | 1.5% | 6.0% | 6.6% |
| Age 15 to 17 | 3.4% | 4.5% | 3.9% |
| Age 18 to 20 | 0.8% | 2.0% | 4.0% |
| Age 21 to 24 | 3.0% | 4.5% | 5.2% |
| Age 25 to 34 | 18.0% | 10.4% | 13.8% |
| Age 35 to 44 | 12.6% | 11.4% | 12.9% |
| Age 45 to 54 | 11.2% | 12.9% | 12.6% |
| Age 55 to 59 | 7.0% | 5.7% | 6.7% |
| Age 60 to 64 | 5.7% | 9.9% | 6.3% |
| Age 65 to 74 | 13.4% | 18.4% | 9.6% |
| Age 75 to 84 | 4.6% | 10.7% | 4.5% |
| Age 85 and over | 4.5% | 2.0% | 1.9% |
| space1 | | | |
| Race | | | |
| | Mancos, CO | Westcliffe, CO | United States |
| White | 87.2% | 93.5% | 59.4% |
| Black | 0.0% | 0.0% | 12.2% |
| Asian | 0.0% | 0.0% | 5.6% |
| Native American | 0.9% | 1.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 1.7% | 0.4% |
| Two or More Races | 1.0% | 0.2% | 3.2% |
| Hispanic | 10.8% | 3.5% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Mancos, CO | Westcliffe, CO | United States |
| Married Population | 49.0% | 44.9% | 49.8% |
| Currently Married | 47.6% | 43.3% | 48.0% |
| Married but Separated | 1.4% | 1.6% | 1.8% |
| Single Population | 51.0% | 55.1% | 50.2% |
| Never Married | 27.7% | 32.0% | 33.8% |
| Divorced | 14.2% | 14.5% | 10.8% |
| Widowed | 9.0% | 8.6% | 5.6% |
| space5 | | | |
| Household Size | 2.18 | 1.69 | 2.60 |
| Households | 514 | 234 | 124,010,992 |
| Family Households | 290 | 88 | 80,755,759 |
| Married couple, w/children | 25.2% | 21.6% | 30.5% |
| Married couple, no children | 55.2% | 67.0% | 42.9% |
| Non Family Households | 224 | 146 | 43,255,233 |
| Single householder, w/children | 12.1% | 9.1% | 15.8% |
| Single householder, no children | 7.6% | 2.3% | 10.8% |