| Rank | County | Households | 
                            
                                
                                    | 1 | King County, Washington | 790,070 | 
                            
                                
                                    | 2 | Pierce County, Washington | 297,839 | 
                            
                                
                                    | 3 | Snohomish County, Washington | 266,331 | 
                            
                                
                                    | 4 | Spokane County, Washington | 185,983 | 
                            
                                
                                    | 5 | Clark County, Washington | 157,179 | 
                            
                                
                                    | 6 | Thurston County, Washington | 100,147 | 
                            
                                
                                    | 7 | Kitsap County, Washington | 96,683 | 
                            
                                
                                    | 8 | Yakima County, Washington | 79,565 | 
                            
                                
                                    | 9 | Whatcom County, Washington | 79,003 | 
                            
                                
                                    | 10 | Benton County, Washington | 63,240 | 
                            
                                
                                    | 11 | Skagit County, Washington | 45,475 | 
                            
                                
                                    | 12 | Cowlitz County, Washington | 39,793 | 
                            
                                
                                    | 13 | Island County, Washington | 33,196 | 
                            
                                
                                    | 14 | Clallam County, Washington | 31,056 | 
                            
                                
                                    | 15 | Grant County, Washington | 29,922 | 
                            
                                
                                    | 16 | Lewis County, Washington | 29,586 | 
                            
                                
                                    | 17 | Grays Harbor County, Washington | 27,570 | 
                            
                                
                                    | 18 | Chelan County, Washington | 26,862 | 
                            
                                
                                    | 19 | Mason County, Washington | 22,914 | 
                            
                                
                                    | 20 | Franklin County, Washington | 22,004 | 
                            
                                
                                    | 21 | Walla Walla County, Washington | 21,645 | 
                            
                                
                                    | 22 | Stevens County, Washington | 17,652 | 
                            
                                
                                    | 23 | Kittitas County, Washington | 16,658 | 
                            
                                
                                    | 24 | Whitman County, Washington | 16,187 | 
                            
                                
                                    | 25 | Okanogan County, Washington | 15,648 | 
                            
                                
                                    | 26 | Jefferson County, Washington | 14,440 | 
                            
                                
                                    | 27 | Douglas County, Washington | 13,937 | 
                            
                                
                                    | 28 | Pacific County, Washington | 9,390 | 
                            
                                
                                    | 29 | Asotin County, Washington | 8,880 | 
                            
                                
                                    | 30 | Klickitat County, Washington | 8,228 | 
                            
                                
                                    | 31 | San Juan County, Washington | 8,051 | 
                            
                                
                                    | 32 | Adams County, Washington | 5,666 | 
                            
                                
                                    | 33 | Pend Oreille County, Washington | 5,450 | 
                            
                                
                                    | 34 | Lincoln County, Washington | 4,661 | 
                            
                                
                                    | 35 | Skamania County, Washington | 4,435 | 
                            
                                
                                    | 36 | Ferry County, Washington | 2,825 | 
                            
                                
                                    | 37 | Columbia County, Washington | 1,790 | 
                            
                                
                                    | 38 | Wahkiakum County, Washington | 1,648 | 
                            
                                
                                    | 39 | Garfield County, Washington | 959 |