Washington

Ten regions on county lines: Seattle area, North Sound, South Sound, Olympic Peninsula, Southwest Washington, North Central WA, Columbia Basin, Yakima/Tri-Cities, Spokane/Northeast and Palouse.

In the editor each region takes a level with one click. When one region needs more detail, split it into its counties and set them one by one; merge it back when they agree.

Regions in this starter map

• Seattle area4 countiesKing County · Snohomish County · Pierce County · Kitsap County
• North Sound4 countiesWhatcom County · Skagit County · Island County · San Juan County
• South Sound3 countiesThurston County · Mason County · Lewis County
• Olympic Peninsula4 countiesClallam County · Jefferson County · Grays Harbor County · Pacific County
• Southwest Washington5 countiesClark County · Cowlitz County · Wahkiakum County · Skamania County · Klickitat County
• North Central WA4 countiesChelan County · Douglas County · Okanogan County · Kittitas County
• Columbia Basin3 countiesGrant County · Adams County · Lincoln County
• Yakima/Tri-Cities4 countiesYakima County · Benton County · Franklin County · Walla Walla County
• Spokane/Northeast4 countiesSpokane County · Stevens County · Pend Oreille County · Ferry County
• Palouse4 countiesWhitman County · Asotin County · Garfield County · Columbia County

County lines from the Census Bureau, coastline from Natural Earth.