| | Santa Clara, NM | Capitan, NM | United States |
| Population | 1,822 | 1,354 | 329,725,481 |
| Female Population | 51.8% | 48.2% | 50.5% |
| Male Population | 48.2% | 51.8% | 49.5% |
| Median Age | 42.8 | 41.5 | 38.4 |
| space3 | | | |
| Population - 2010 | 1,900 | 1,489 | 309,327,143 |
| Population - 2000 | 1,944 | 1,443 | 285,036,114 |
| Population - 1990 | 1,766 | 842 | 251,960,433 |
| Pop. 2000 to Now | -9.4% | 1.0% | 15.6% |
| Pop. 1990 to Now | -0.3% | 73.0% | 30.8% |
| space4 | | | |
| Population Density | 1,333.8 | 415.5 | 93.4 |
| Land Area | 1.4 | 3.3 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Santa Clara, NM | Capitan, NM | United States |
| Age 0 to 4 | 6.4% | 6.1% | 5.9% |
| Age 5 to 9 | 7.4% | 3.1% | 6.1% |
| Age 10 to 14 | 2.5% | 9.6% | 6.6% |
| Age 15 to 17 | 5.4% | 3.5% | 3.9% |
| Age 18 to 20 | 7.8% | 8.6% | 4.0% |
| Age 21 to 24 | 4.9% | 0.0% | 5.2% |
| Age 25 to 34 | 2.4% | 9.4% | 13.8% |
| Age 35 to 44 | 15.5% | 13.4% | 12.9% |
| Age 45 to 54 | 7.0% | 7.9% | 12.6% |
| Age 55 to 59 | 8.6% | 5.2% | 6.7% |
| Age 60 to 64 | 6.8% | 7.7% | 6.3% |
| Age 65 to 74 | 10.6% | 15.6% | 9.6% |
| Age 75 to 84 | 6.8% | 6.9% | 4.5% |
| Age 85 and over | 7.8% | 3.0% | 1.9% |
| space1 | | | |
| Race | | | |
| | Santa Clara, NM | Capitan, NM | United States |
| White | 19.9% | 50.5% | 59.4% |
| Black | 2.0% | 0.0% | 12.2% |
| Asian | 0.0% | 0.0% | 5.6% |
| Native American | 3.2% | 1.8% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 0.3% | 1.6% | 3.2% |
| Hispanic | 74.6% | 46.0% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Santa Clara, NM | Capitan, NM | United States |
| Married Population | 22.5% | 42.9% | 49.8% |
| Currently Married | 21.8% | 42.9% | 48.0% |
| Married but Separated | 0.7% | 0.0% | 1.8% |
| Single Population | 77.5% | 57.1% | 50.2% |
| Never Married | 42.0% | 26.0% | 33.8% |
| Divorced | 17.4% | 15.7% | 10.8% |
| Widowed | 18.1% | 15.4% | 5.6% |
| space5 | | | |
| Household Size | 2.90 | 2.41 | 2.60 |
| Households | 587 | 561 | 124,010,992 |
| Family Households | 306 | 304 | 80,755,759 |
| Married couple, w/children | 19.0% | 21.4% | 30.5% |
| Married couple, no children | 31.4% | 52.0% | 42.9% |
| Non Family Households | 281 | 257 | 43,255,233 |
| Single householder, w/children | 15.7% | 15.5% | 15.8% |
| Single householder, no children | 34.0% | 11.2% | 10.8% |