| | New Castle, CO | Medford, OR | United States |
| Population | 4,883 | 84,894 | 329,725,481 |
| Female Population | 49.8% | 50.6% | 50.5% |
| Male Population | 50.2% | 49.4% | 49.5% |
| Median Age | 36.3 | 37.7 | 38.4 |
| space3 | | | |
| Population - 2010 | 4,492 | 75,066 | 309,327,143 |
| Population - 2000 | 1,984 | 63,154 | 285,036,114 |
| Population - 1990 | 679 | 46,951 | 251,960,433 |
| Pop. 2000 to Now | 150.1% | 32.1% | 15.6% |
| Pop. 1990 to Now | 630.8% | 77.7% | 30.8% |
| space4 | | | |
| Population Density | 1,834.3 | 3,295.3 | 93.4 |
| Land Area | 2.7 | 25.8 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | New Castle, CO | Medford, OR | United States |
| Age 0 to 4 | 10.4% | 6.2% | 5.9% |
| Age 5 to 9 | 6.2% | 6.3% | 6.1% |
| Age 10 to 14 | 5.9% | 7.1% | 6.6% |
| Age 15 to 17 | 6.1% | 3.9% | 3.9% |
| Age 18 to 20 | 3.9% | 3.1% | 4.0% |
| Age 21 to 24 | 6.1% | 4.9% | 5.2% |
| Age 25 to 34 | 10.0% | 14.8% | 13.8% |
| Age 35 to 44 | 14.2% | 13.2% | 12.9% |
| Age 45 to 54 | 14.9% | 11.0% | 12.6% |
| Age 55 to 59 | 4.0% | 5.5% | 6.7% |
| Age 60 to 64 | 6.2% | 6.2% | 6.3% |
| Age 65 to 74 | 3.8% | 10.3% | 9.6% |
| Age 75 to 84 | 7.6% | 4.9% | 4.5% |
| Age 85 and over | 0.7% | 2.8% | 1.9% |
| space1 | | | |
| Race | | | |
| | New Castle, CO | Medford, OR | United States |
| White | 70.0% | 74.9% | 59.4% |
| Black | 0.0% | 0.9% | 12.2% |
| Asian | 0.8% | 1.1% | 5.6% |
| Native American | 0.2% | 1.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.3% | 0.2% |
| Other | 0.0% | 0.2% | 0.4% |
| Two or More Races | 1.6% | 4.4% | 3.2% |
| Hispanic | 27.4% | 17.2% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | New Castle, CO | Medford, OR | United States |
| Married Population | 52.9% | 48.9% | 49.8% |
| Currently Married | 52.6% | 47.2% | 48.0% |
| Married but Separated | 0.3% | 1.6% | 1.8% |
| Single Population | 47.1% | 51.1% | 50.2% |
| Never Married | 27.0% | 30.0% | 33.8% |
| Divorced | 15.8% | 15.0% | 10.8% |
| Widowed | 4.4% | 6.2% | 5.6% |
| space5 | | | |
| Household Size | 2.93 | 2.47 | 2.60 |
| Households | 1,669 | 33,645 | 124,010,992 |
| Family Households | 1,139 | 20,673 | 80,755,759 |
| Married couple, w/children | 54.4% | 31.4% | 30.5% |
| Married couple, no children | 32.6% | 40.9% | 42.9% |
| Non Family Households | 530 | 12,972 | 43,255,233 |
| Single householder, w/children | 12.0% | 18.5% | 15.8% |
| Single householder, no children | 1.0% | 9.1% | 10.8% |