District 1 includes: Clark, Cowlitz, Klickitat, Skamania, Wahkiakum counties

District 2 includes: Thurston County

​District 3 includes: Pierce County

District 4 includes: King County

District 5 includes:  Grays Harbor, Lewis, Pacific counties

​District 6 includes: Island, San Juan, Skagit, Whatcom counties

District 7 includes: Snohomish county
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District 8 includes: Chelan, Douglas, Ferry, Grant, Kittitas, Lincoln, Okanogan, Pend Oreille, Spokane, Stevens counties

​District 9  includes:  Adams, Asotin, Benton, Columbia, Franklin, Garfield, Walla Walla, Whitman, Yakima counties

​District 10 includes: Clallam, Jefferson, Kitsap, Mason counties