| | The Dalles, OR | Dallas, OR | United States |
| Population | 15,942 | 16,663 | 329,725,481 |
| Female Population | 52.5% | 52.8% | 50.5% |
| Male Population | 47.6% | 47.2% | 49.5% |
| Median Age | 37.7 | 42.3 | 38.4 |
| space3 | | | |
| Population - 2010 | 14,983 | 14,618 | 309,327,143 |
| Population - 2000 | 13,853 | 12,459 | 285,036,114 |
| Population - 1990 | 12,726 | 9,422 | 251,960,433 |
| Pop. 2000 to Now | 12.5% | 39.1% | 15.6% |
| Pop. 1990 to Now | 22.4% | 83.9% | 30.8% |
| space4 | | | |
| Population Density | 2,394.1 | 3,393.0 | 93.4 |
| Land Area | 6.7 | 4.9 | 3,531,905.4 |
| Water Area | 0.3 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | The Dalles, OR | Dallas, OR | United States |
| Age 0 to 4 | 6.3% | 6.3% | 5.9% |
| Age 5 to 9 | 5.7% | 4.0% | 6.1% |
| Age 10 to 14 | 8.6% | 5.5% | 6.6% |
| Age 15 to 17 | 3.8% | 3.2% | 3.9% |
| Age 18 to 20 | 3.4% | 5.0% | 4.0% |
| Age 21 to 24 | 4.6% | 8.2% | 5.2% |
| Age 25 to 34 | 13.3% | 11.7% | 13.8% |
| Age 35 to 44 | 13.4% | 9.4% | 12.9% |
| Age 45 to 54 | 10.1% | 11.0% | 12.6% |
| Age 55 to 59 | 5.1% | 5.4% | 6.7% |
| Age 60 to 64 | 6.8% | 6.7% | 6.3% |
| Age 65 to 74 | 10.3% | 14.0% | 9.6% |
| Age 75 to 84 | 5.2% | 6.3% | 4.5% |
| Age 85 and over | 3.4% | 3.4% | 1.9% |
| space1 | | | |
| Race | | | |
| | The Dalles, OR | Dallas, OR | United States |
| White | 75.1% | 87.2% | 59.4% |
| Black | 0.3% | 0.9% | 12.2% |
| Asian | 0.9% | 0.2% | 5.6% |
| Native American | 0.7% | 1.5% | 0.6% |
| Hawaiian, Pacific Islander | 0.3% | 0.0% | 0.2% |
| Other | 0.0% | 1.4% | 0.4% |
| Two or More Races | 3.7% | 3.3% | 3.2% |
| Hispanic | 19.0% | 5.4% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | The Dalles, OR | Dallas, OR | United States |
| Married Population | 47.0% | 52.2% | 49.8% |
| Currently Married | 45.5% | 51.3% | 48.0% |
| Married but Separated | 1.5% | 0.9% | 1.8% |
| Single Population | 53.0% | 47.8% | 50.2% |
| Never Married | 31.1% | 27.5% | 33.8% |
| Divorced | 12.9% | 14.1% | 10.8% |
| Widowed | 8.9% | 6.2% | 5.6% |
| space5 | | | |
| Household Size | 2.51 | 2.46 | 2.60 |
| Households | 6,189 | 6,612 | 124,010,992 |
| Family Households | 3,796 | 4,283 | 80,755,759 |
| Married couple, w/children | 31.6% | 29.2% | 30.5% |
| Married couple, no children | 39.4% | 50.9% | 42.9% |
| Non Family Households | 2,393 | 2,329 | 43,255,233 |
| Single householder, w/children | 16.1% | 11.6% | 15.8% |
| Single householder, no children | 12.9% | 8.3% | 10.8% |