| | Sumpter, OR | Baker City, OR | United States |
| Population | 237 | 9,998 | 329,725,481 |
| Female Population | 46.4% | 48.5% | 50.5% |
| Male Population | 53.6% | 51.5% | 49.5% |
| Median Age | 71.5 | 42.5 | 38.4 |
| space3 | | | |
| Population - 2010 | 206 | 9,819 | 309,327,143 |
| Population - 2000 | 171 | 9,860 | 285,036,114 |
| Population - 1990 | 119 | 9,140 | 251,960,433 |
| Pop. 2000 to Now | 22.8% | 0.2% | 15.6% |
| Pop. 1990 to Now | 76.5% | 8.1% | 30.8% |
| space4 | | | |
| Population Density | 108.6 | 1,396.0 | 93.4 |
| Land Area | 2.2 | 7.2 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Sumpter, OR | Baker City, OR | United States |
| Age 0 to 4 | 0.0% | 6.1% | 5.9% |
| Age 5 to 9 | 0.0% | 6.2% | 6.1% |
| Age 10 to 14 | 0.0% | 6.3% | 6.6% |
| Age 15 to 17 | 0.0% | 3.5% | 3.9% |
| Age 18 to 20 | 0.0% | 2.0% | 4.0% |
| Age 21 to 24 | 0.0% | 4.3% | 5.2% |
| Age 25 to 34 | 2.5% | 12.5% | 13.8% |
| Age 35 to 44 | 3.0% | 13.1% | 12.9% |
| Age 45 to 54 | 2.1% | 11.4% | 12.6% |
| Age 55 to 59 | 6.3% | 5.2% | 6.7% |
| Age 60 to 64 | 1.7% | 6.6% | 6.3% |
| Age 65 to 74 | 62.4% | 11.5% | 9.6% |
| Age 75 to 84 | 20.3% | 6.5% | 4.5% |
| Age 85 and over | 1.7% | 4.9% | 1.9% |
| space1 | | | |
| Race | | | |
| | Sumpter, OR | Baker City, OR | United States |
| White | 98.3% | 89.3% | 59.4% |
| Black | 0.0% | 1.6% | 12.2% |
| Asian | 0.0% | 0.4% | 5.6% |
| Native American | 0.0% | 1.1% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.2% | 0.2% |
| Other | 0.0% | 0.1% | 0.4% |
| Two or More Races | 0.4% | 1.8% | 3.2% |
| Hispanic | 1.3% | 5.6% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Sumpter, OR | Baker City, OR | United States |
| Married Population | 71.7% | 51.9% | 49.8% |
| Currently Married | 67.9% | 50.9% | 48.0% |
| Married but Separated | 3.8% | 0.9% | 1.8% |
| Single Population | 28.3% | 48.1% | 50.2% |
| Never Married | 4.6% | 26.2% | 33.8% |
| Divorced | 15.2% | 14.2% | 10.8% |
| Widowed | 8.4% | 7.7% | 5.6% |
| space5 | | | |
| Household Size | 1.80 | 2.29 | 2.60 |
| Households | 132 | 4,131 | 124,010,992 |
| Family Households | 84 | 2,288 | 80,755,759 |
| Married couple, w/children | 0.0% | 33.5% | 30.5% |
| Married couple, no children | 95.2% | 48.9% | 42.9% |
| Non Family Households | 48 | 1,843 | 43,255,233 |
| Single householder, w/children | 0.0% | 11.1% | 15.8% |
| Single householder, no children | 4.8% | 6.6% | 10.8% |