| | Thoreau, NM | Seama, NM | United States |
| Population | 2,353 | 343 | 329,725,481 |
| Female Population | 45.7% | 54.2% | 50.5% |
| Male Population | 54.3% | 45.8% | 49.5% |
| Median Age | 26.5 | 26.1 | 38.4 |
| space3 | | | |
| Population - 2010 | 957 | 116 | 309,327,143 |
| Population - 2000 | 1,863 | 333 | 285,036,114 |
| Population - 1990 | 1,247 | 403 | 251,960,433 |
| Pop. 2000 to Now | -29.8% | -12.6% | 15.6% |
| Pop. 1990 to Now | 4.8% | -27.8% | 30.8% |
| space4 | | | |
| Population Density | 147.9 | 54.9 | 93.4 |
| Land Area | 15.9 | 6.2 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Thoreau, NM | Seama, NM | United States |
| Age 0 to 4 | 8.3% | 4.7% | 5.9% |
| Age 5 to 9 | 10.2% | 19.5% | 6.1% |
| Age 10 to 14 | 8.4% | 11.1% | 6.6% |
| Age 15 to 17 | 6.4% | 9.6% | 3.9% |
| Age 18 to 20 | 9.0% | 5.0% | 4.0% |
| Age 21 to 24 | 6.9% | 0.0% | 5.2% |
| Age 25 to 34 | 8.9% | 10.8% | 13.8% |
| Age 35 to 44 | 13.8% | 17.8% | 12.9% |
| Age 45 to 54 | 7.2% | 3.8% | 12.6% |
| Age 55 to 59 | 2.6% | 5.2% | 6.7% |
| Age 60 to 64 | 7.2% | 4.1% | 6.3% |
| Age 65 to 74 | 7.6% | 3.8% | 9.6% |
| Age 75 to 84 | 2.8% | 4.7% | 4.5% |
| Age 85 and over | 0.8% | 0.0% | 1.9% |
| space1 | | | |
| Race | | | |
| | Thoreau, NM | Seama, NM | United States |
| White | 4.7% | 0.0% | 59.4% |
| Black | 0.5% | 0.0% | 12.2% |
| Asian | 0.2% | 0.3% | 5.6% |
| Native American | 59.4% | 99.7% | 0.6% |
| Hawaiian, Pacific Islander | 0.2% | 0.0% | 0.2% |
| Other | 0.5% | 0.0% | 0.4% |
| Two or More Races | 0.9% | 0.0% | 3.2% |
| Hispanic | 33.7% | 0.0% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Thoreau, NM | Seama, NM | United States |
| Married Population | 39.4% | 30.2% | 49.8% |
| Currently Married | 38.5% | 30.2% | 48.0% |
| Married but Separated | 0.9% | 0.0% | 1.8% |
| Single Population | 60.6% | 69.8% | 50.2% |
| Never Married | 50.2% | 52.3% | 33.8% |
| Divorced | 3.0% | 17.1% | 10.8% |
| Widowed | 7.4% | 0.5% | 5.6% |
| space5 | | | |
| Household Size | 3.61 | 4.57 | 2.60 |
| Households | 651 | 75 | 124,010,992 |
| Family Households | 473 | 62 | 80,755,759 |
| Married couple, w/children | 24.5% | 56.5% | 30.5% |
| Married couple, no children | 37.0% | 0.0% | 42.9% |
| Non Family Households | 178 | 13 | 43,255,233 |
| Single householder, w/children | 28.8% | 33.9% | 15.8% |
| Single householder, no children | 9.7% | 9.7% | 10.8% |