| City : | Rock Island City |
| County : | Douglas County, Randolph County |
| State : | Washington (WA) |
| | |
| Land Area : | 0.61 sq mi |
| Water Area : | 0.14 sq mi |
| Latitude : | 47.3740108 |
| Longitude : | -120.1384163 |
| | |
| Population (2010): | 788 |
| Population Estimate (2012) : | 689 |
| Population Density : | 1,284.92/sq mi |
| Housing Units (2012) : | 277 |
| Median Household Income (2012) : | $39,583 (Washington : $59,374, USA : $53,046) |
| Median Family Income (2012) : | $43,125 (Washington : $71,939, USA : $64,585) |
| Median House Price (2012) : | $123,700 (Washington : $272,900, USA : $181,400) |