Rock Island is located in Washington. Rock Island, Washington has a population of 1,393. Rock Island is more family-centric than the surrounding county with 51.3% of the households containing married families with children. The county average for households married with children is 30.47%.
The median household income in Rock Island, Washington is $50,000. The median household income for the surrounding county is $68,979 compared to the national median of $69,021. The median age of people living in Rock Island is 29.3 years.
The average high temperature in July is 85.2 degrees, with an average low temperature in January of 24 degrees. The average rainfall is approximately 13.9 inches per year, with 60 inches of snow per year.
