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King County watershed map

Click on the map below to find information about specific watersheds, rivers and streams including news, reports, data, activities, grants, and stewardship organizations. For info spanning multiple watersheds, see King County's watershed information page.



King County Watersheds Map - Click your Watershed
White River Watershed Green River Watershed Snoqualmie - Skykomish River Watershed Sammamish Watershed Cedar River - Lake Washington Watershed Central Puget Sound Watershed Vashon-Maury Island Environmental Information

A watershed in King County is the land area draining to a nearby river or lake, or directly into Puget Sound.

City of Seattle watersheds

Seattle urban watersheds 
Urban creek watersheds not only are home to fish and wildlife, but help to filter stormwater before it enters lakes, the Duwamish River and Puget Sound.

Seattle watersheds (drinking water)
Information about Seattle's Tolt River and Cedar River watersheds, where Seattle and much of King County gets its drinking water.

City of Bellevue

Bellevue drainage basins
Bellevue has 25 drainage basins – areas of land that each drain to a stream or lake. City staff have prepared fact sheets that offer a snapshot of the built and natural conditions in each drainage basin.