Sunnyslope is an unincorporated community and census-designated place in Chelan County, Washington, United States. It is part of the Wenatchee–East Wenatchee Metropolitan Statistical Area. The population was 4,041 at the 2020 census, up from 3,252 at the 2010 census. By per capita income, Sunnyslope ranks 53rd of 522 areas in the state of Washington to be ranked. It is also the highest rank achieved in Chelan County.