Seattle Hill-Silver Firs is a census-designated place (CDP) in Snohomish County, Washington, United States. The population was 35,311 at the 2000 census. It lies northeast of the city of Mill Creek and southeast of the city of Everett. Based on per capita income, one of the more reliable measures of affluence, Seattle Hill-Silver Firs ranks 69th of 522 areas in the state of Washington to be ranked.