| | Portales, NM | Benson, AZ | United States |
| Population | 12,151 | 5,252 | 329,725,481 |
| Female Population | 51.0% | 49.4% | 50.5% |
| Male Population | 49.0% | 50.6% | 49.5% |
| Median Age | 27.1 | 48.7 | 38.4 |
| space3 | | | |
| Population - 2010 | 12,404 | 5,122 | 309,327,143 |
| Population - 2000 | 11,131 | 4,711 | 285,036,114 |
| Population - 1990 | 10,690 | 3,824 | 251,960,433 |
| Pop. 2000 to Now | 3.2% | 3.8% | 15.6% |
| Pop. 1990 to Now | 7.5% | 27.9% | 30.8% |
| space4 | | | |
| Population Density | 1,535.4 | 126.1 | 93.4 |
| Land Area | 7.9 | 41.6 | 3,531,905.4 |
| Water Area | 0.0 | 0.1 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Portales, NM | Benson, AZ | United States |
| Age 0 to 4 | 6.4% | 5.8% | 5.9% |
| Age 5 to 9 | 8.6% | 3.9% | 6.1% |
| Age 10 to 14 | 6.9% | 6.1% | 6.6% |
| Age 15 to 17 | 4.1% | 4.4% | 3.9% |
| Age 18 to 20 | 9.0% | 2.2% | 4.0% |
| Age 21 to 24 | 12.5% | 4.6% | 5.2% |
| Age 25 to 34 | 12.5% | 9.4% | 13.8% |
| Age 35 to 44 | 11.9% | 11.1% | 12.9% |
| Age 45 to 54 | 7.3% | 9.2% | 12.6% |
| Age 55 to 59 | 4.0% | 7.2% | 6.7% |
| Age 60 to 64 | 4.1% | 6.2% | 6.3% |
| Age 65 to 74 | 8.1% | 16.4% | 9.6% |
| Age 75 to 84 | 3.0% | 9.6% | 4.5% |
| Age 85 and over | 1.6% | 4.1% | 1.9% |
| space1 | | | |
| Race | | | |
| | Portales, NM | Benson, AZ | United States |
| White | 45.9% | 64.0% | 59.4% |
| Black | 3.2% | 0.6% | 12.2% |
| Asian | 0.7% | 1.1% | 5.6% |
| Native American | 0.3% | 0.7% | 0.6% |
| Hawaiian, Pacific Islander | 0.1% | 0.0% | 0.2% |
| Other | 0.6% | 0.0% | 0.4% |
| Two or More Races | 3.7% | 5.8% | 3.2% |
| Hispanic | 45.6% | 27.8% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Portales, NM | Benson, AZ | United States |
| Married Population | 39.4% | 42.5% | 49.8% |
| Currently Married | 36.8% | 40.7% | 48.0% |
| Married but Separated | 2.6% | 1.7% | 1.8% |
| Single Population | 60.6% | 57.6% | 50.2% |
| Never Married | 42.2% | 28.9% | 33.8% |
| Divorced | 11.5% | 17.4% | 10.8% |
| Widowed | 6.9% | 11.3% | 5.6% |
| space5 | | | |
| Household Size | 2.63 | 2.29 | 2.60 |
| Households | 4,273 | 2,285 | 124,010,992 |
| Family Households | 2,314 | 1,305 | 80,755,759 |
| Married couple, w/children | 36.1% | 20.6% | 30.5% |
| Married couple, no children | 33.2% | 47.5% | 42.9% |
| Non Family Households | 1,959 | 980 | 43,255,233 |
| Single householder, w/children | 22.9% | 19.9% | 15.8% |
| Single householder, no children | 7.8% | 12.0% | 10.8% |