| | | Lewis County | WA | 53041 | | Centralia, WA 16500 | Seattle-Tacoma, WA 500 | Central | nonmetro county (rural) | nonspecialized | https://maps.google.com/?q=LewisCounty+WA |
| | | Lincoln County | WA | 53043 | | | | | nonmetro county (rural) | farm-dependent | https://maps.google.com/?q=LincolnCounty+WA |
| | | Mason County | WA | 53045 | | Shelton, WA 43220 | Seattle-Tacoma, WA 500 | Central | nonmetro county (rural) | recreation | https://maps.google.com/?q=MasonCounty+WA |
| | | Okanogan County | WA | 53047 | | | | | nonmetro county (rural) | farm-dependent | https://maps.google.com/?q=OkanoganCounty+WA |
| | | Pacific County | WA | 53049 | | | | | nonmetro county (rural) | recreation | https://maps.google.com/?q=PacificCounty+WA |
| | | Pend Oreille County | WA | 53051 | | | | | metro county (urban) | nonspecialized | https://maps.google.com/?q=PendOreilleCounty+WA |
| | | Pierce County | WA | 53053 | Tacoma-Lakewood, WA 45104 | Seattle-Tacoma-Bellevue,
WA 42660 | Seattle-Tacoma, WA 500 | Central | metro county (urban) | nonspecialized | https://maps.google.com/?q=PierceCounty+WA |
| | | San Juan County | WA | 53055 | | | | | nonmetro county (rural) | recreation | https://maps.google.com/?q=SanJuanCounty+WA |
| | | Skagit County | WA | 53057 | | Mount Vernon-Anacortes,
WA 34580 | Seattle-Tacoma, WA 500 | Central | metro county (urban) | nonspecialized | https://maps.google.com/?q=SkagitCounty+WA |
| | | Skamania County | WA | 53059 | | Portland-Vancouver-Hillsboro,
OR-WA 38900 | Portland-Vancouver-Salem,
OR-WA 440 | Outlying | metro county (urban) | recreation | https://maps.google.com/?q=SkamaniaCounty+WA |
