| | Grand Coulee, WA | Lakewood, WA | United States |
| Population | 1,121 | 62,972 | 329,725,481 |
| Female Population | 47.6% | 50.7% | 50.5% |
| Male Population | 52.4% | 49.3% | 49.5% |
| Median Age | 50.7 | 35.7 | 38.4 |
| space3 | | | |
| Population - 2010 | 1,036 | 57,601 | 309,327,143 |
| Population - 2000 | 897 | 58,211 | 285,036,114 |
| Population - 1990 | 984 | 58,412 | 251,960,433 |
| Pop. 2000 to Now | 17.1% | 4.8% | 15.6% |
| Pop. 1990 to Now | 6.7% | 4.4% | 30.8% |
| space4 | | | |
| Population Density | 921.1 | 3,685.2 | 93.4 |
| Land Area | 1.2 | 17.1 | 3,531,905.4 |
| Water Area | 0.1 | 1.8 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Grand Coulee, WA | Lakewood, WA | United States |
| Age 0 to 4 | 1.0% | 5.9% | 5.9% |
| Age 5 to 9 | 4.0% | 6.1% | 6.1% |
| Age 10 to 14 | 6.4% | 6.0% | 6.6% |
| Age 15 to 17 | 5.1% | 3.1% | 3.9% |
| Age 18 to 20 | 5.0% | 2.8% | 4.0% |
| Age 21 to 24 | 1.4% | 7.2% | 5.2% |
| Age 25 to 34 | 13.0% | 17.8% | 13.8% |
| Age 35 to 44 | 10.4% | 12.1% | 12.9% |
| Age 45 to 54 | 9.1% | 10.6% | 12.6% |
| Age 55 to 59 | 12.5% | 5.9% | 6.7% |
| Age 60 to 64 | 6.8% | 6.8% | 6.3% |
| Age 65 to 74 | 13.7% | 9.6% | 9.6% |
| Age 75 to 84 | 7.0% | 4.1% | 4.5% |
| Age 85 and over | 4.5% | 2.0% | 1.9% |
| space1 | | | |
| Race | | | |
| | Grand Coulee, WA | Lakewood, WA | United States |
| White | 71.0% | 46.9% | 59.4% |
| Black | 0.0% | 13.1% | 12.2% |
| Asian | 1.1% | 7.9% | 5.6% |
| Native American | 7.3% | 0.8% | 0.6% |
| Hawaiian, Pacific Islander | 0.2% | 3.7% | 0.2% |
| Other | 0.8% | 0.4% | 0.4% |
| Two or More Races | 5.2% | 9.8% | 3.2% |
| Hispanic | 14.5% | 17.5% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Grand Coulee, WA | Lakewood, WA | United States |
| Married Population | 45.0% | 46.5% | 49.8% |
| Currently Married | 44.8% | 44.1% | 48.0% |
| Married but Separated | 0.2% | 2.4% | 1.8% |
| Single Population | 55.0% | 53.5% | 50.2% |
| Never Married | 27.7% | 33.0% | 33.8% |
| Divorced | 19.8% | 15.2% | 10.8% |
| Widowed | 7.5% | 5.2% | 5.6% |
| space5 | | | |
| Household Size | 1.97 | 2.44 | 2.60 |
| Households | 556 | 25,323 | 124,010,992 |
| Family Households | 283 | 15,300 | 80,755,759 |
| Married couple, w/children | 21.2% | 24.2% | 30.5% |
| Married couple, no children | 47.7% | 43.2% | 42.9% |
| Non Family Households | 273 | 10,023 | 43,255,233 |
| Single householder, w/children | 17.3% | 20.3% | 15.8% |
| Single householder, no children | 13.8% | 12.3% | 10.8% |