| | Radium Springs, NM | Milan, NM | United States |
| Population | 1,991 | 2,677 | 329,725,481 |
| Female Population | 49.0% | 38.7% | 50.5% |
| Male Population | 51.0% | 61.3% | 49.5% |
| Median Age | 28.8 | 46.9 | 38.4 |
| space3 | | | |
| Population - 2010 | 1,590 | 3,637 | 309,327,143 |
| Population - 2000 | 1,518 | 1,891 | 285,036,114 |
| Population - 1990 | 880 | 1,911 | 251,960,433 |
| Pop. 2000 to Now | 2.4% | 92.5% | 15.6% |
| Pop. 1990 to Now | 76.7% | 90.5% | 30.8% |
| space4 | | | |
| Population Density | 333.2 | 617.0 | 93.4 |
| Land Area | 6.0 | 4.3 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Radium Springs, NM | Milan, NM | United States |
| Age 0 to 4 | 4.8% | 4.6% | 5.9% |
| Age 5 to 9 | 3.8% | 5.8% | 6.1% |
| Age 10 to 14 | 10.6% | 4.9% | 6.6% |
| Age 15 to 17 | 4.9% | 1.3% | 3.9% |
| Age 18 to 20 | 6.2% | 3.6% | 4.0% |
| Age 21 to 24 | 12.1% | 2.7% | 5.2% |
| Age 25 to 34 | 19.5% | 13.7% | 13.8% |
| Age 35 to 44 | 7.5% | 9.9% | 12.9% |
| Age 45 to 54 | 12.2% | 32.1% | 12.6% |
| Age 55 to 59 | 3.2% | 3.1% | 6.7% |
| Age 60 to 64 | 3.0% | 8.8% | 6.3% |
| Age 65 to 74 | 7.8% | 8.2% | 9.6% |
| Age 75 to 84 | 3.9% | 1.2% | 4.5% |
| Age 85 and over | 0.4% | 0.0% | 1.9% |
| space1 | | | |
| Race | | | |
| | Radium Springs, NM | Milan, NM | United States |
| White | 47.9% | 12.7% | 59.4% |
| Black | 0.0% | 1.1% | 12.2% |
| Asian | 0.9% | 0.0% | 5.6% |
| Native American | 0.0% | 15.2% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 1.1% | 0.0% | 0.4% |
| Two or More Races | 0.2% | 2.6% | 3.2% |
| Hispanic | 49.9% | 68.4% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Radium Springs, NM | Milan, NM | United States |
| Married Population | 51.7% | 25.1% | 49.8% |
| Currently Married | 47.4% | 24.9% | 48.0% |
| Married but Separated | 4.4% | 0.2% | 1.8% |
| Single Population | 48.3% | 74.9% | 50.2% |
| Never Married | 38.5% | 27.7% | 33.8% |
| Divorced | 7.2% | 41.4% | 10.8% |
| Widowed | 2.7% | 5.8% | 5.6% |
| space5 | | | |
| Household Size | 3.52 | 2.95 | 2.60 |
| Households | 566 | 868 | 124,010,992 |
| Family Households | 497 | 357 | 80,755,759 |
| Married couple, w/children | 35.2% | 27.5% | 30.5% |
| Married couple, no children | 33.6% | 39.8% | 42.9% |
| Non Family Households | 69 | 511 | 43,255,233 |
| Single householder, w/children | 26.2% | 23.2% | 15.8% |
| Single householder, no children | 5.0% | 9.5% | 10.8% |