| | Thurston County | WA | 53067 | | Olympia-Lacey-Tumwater,
WA 36500 | Seattle-Tacoma, WA 500 | Central | metro county (urban) | federal/state
government-dependent | https://maps.google.com/?q=ThurstonCounty+WA |
| | Snohomish County | WA | 53061 | Everett, WA 21794 | Seattle-Tacoma-Bellevue,
WA 42660 | Seattle-Tacoma, WA 500 | Central | metro county (urban) | manufacturing-dependent | https://maps.google.com/?q=SnohomishCounty+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 |
| | 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 |
| | Mason County | WA | 53045 | | Shelton, WA 43220 | Seattle-Tacoma, WA 500 | Central | nonmetro county (rural) | recreation | https://maps.google.com/?q=MasonCounty+WA |
| | Lewis County | WA | 53041 | | Centralia, WA 16500 | Seattle-Tacoma, WA 500 | Central | nonmetro county (rural) | nonspecialized | https://maps.google.com/?q=LewisCounty+WA |
| | Kitsap County | WA | 53035 | | Bremerton-Silverdale-Port
Orchard, WA 14740 | Seattle-Tacoma, WA 500 | Central | metro county (urban) | federal/state
government-dependent | https://maps.google.com/?q=KitsapCounty+WA |
| | King County | WA | 53033 | Seattle-Bellevue-Kent, WA 42644 | Seattle-Tacoma-Bellevue,
WA 42660 | Seattle-Tacoma, WA 500 | Central | metro county (urban) | nonspecialized | https://maps.google.com/?q=KingCounty+WA |
| | Island County | WA | 53029 | | Oak Harbor, WA 36020 | Seattle-Tacoma, WA 500 | Central | nonmetro county (rural) | recreation | https://maps.google.com/?q=IslandCounty+WA |