| | South Cle Elum, WA | Renton, WA | United States |
| Population | 778 | 105,313 | 329,725,481 |
| Female Population | 48.2% | 50.0% | 50.5% |
| Male Population | 51.8% | 50.0% | 49.5% |
| Median Age | 32.6 | 36.2 | 38.4 |
| space3 | | | |
| Population - 2010 | 530 | 92,372 | 309,327,143 |
| Population - 2000 | 457 | 50,052 | 285,036,114 |
| Population - 1990 | 457 | 41,688 | 251,960,433 |
| Pop. 2000 to Now | 23.6% | 102.8% | 15.6% |
| Pop. 1990 to Now | 23.6% | 143.5% | 30.8% |
| space4 | | | |
| Population Density | 1,959.7 | 4,491.7 | 93.4 |
| Land Area | 0.4 | 23.4 | 3,531,905.4 |
| Water Area | 0.0 | 0.2 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | South Cle Elum, WA | Renton, WA | United States |
| Age 0 to 4 | 11.7% | 6.5% | 5.9% |
| Age 5 to 9 | 4.2% | 5.9% | 6.1% |
| Age 10 to 14 | 1.2% | 6.1% | 6.6% |
| Age 15 to 17 | 2.7% | 2.9% | 3.9% |
| Age 18 to 20 | 0.0% | 2.7% | 4.0% |
| Age 21 to 24 | 14.9% | 5.3% | 5.2% |
| Age 25 to 34 | 21.3% | 18.3% | 13.8% |
| Age 35 to 44 | 5.9% | 15.4% | 12.9% |
| Age 45 to 54 | 12.2% | 13.5% | 12.6% |
| Age 55 to 59 | 4.8% | 5.4% | 6.7% |
| Age 60 to 64 | 5.1% | 5.8% | 6.3% |
| Age 65 to 74 | 11.4% | 7.2% | 9.6% |
| Age 75 to 84 | 4.5% | 3.3% | 4.5% |
| Age 85 and over | 0.0% | 1.7% | 1.9% |
| space1 | | | |
| Race | | | |
| | South Cle Elum, WA | Renton, WA | United States |
| White | 88.3% | 43.2% | 59.4% |
| Black | 0.0% | 7.8% | 12.2% |
| Asian | 0.0% | 24.2% | 5.6% |
| Native American | 0.0% | 0.3% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.9% | 0.2% |
| Other | 0.5% | 0.4% | 0.4% |
| Two or More Races | 4.6% | 7.8% | 3.2% |
| Hispanic | 6.6% | 15.6% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | South Cle Elum, WA | Renton, WA | United States |
| Married Population | 52.4% | 48.0% | 49.8% |
| Currently Married | 51.0% | 46.1% | 48.0% |
| Married but Separated | 1.4% | 1.8% | 1.8% |
| Single Population | 47.6% | 52.0% | 50.2% |
| Never Married | 29.5% | 36.2% | 33.8% |
| Divorced | 13.2% | 11.4% | 10.8% |
| Widowed | 5.0% | 4.5% | 5.6% |
| space5 | | | |
| Household Size | 2.25 | 2.62 | 2.60 |
| Households | 346 | 40,011 | 124,010,992 |
| Family Households | 234 | 25,179 | 80,755,759 |
| Married couple, w/children | 16.7% | 32.1% | 30.5% |
| Married couple, no children | 50.4% | 37.1% | 42.9% |
| Non Family Households | 112 | 14,832 | 43,255,233 |
| Single householder, w/children | 20.5% | 17.6% | 15.8% |
| Single householder, no children | 12.4% | 13.3% | 10.8% |