PSRC members include more than 80 entities, including King, Pierce, Snohomish and Kitsap counties, as well as cities, towns, ports, state and local transportation agencies and tribal governments within the region.

CIty of Snohomish
Members
Counties
- King County
- Kitsap County
- Pierce County
- Snohomish County
Cities & Tribes
- Algona
- Arlington
- Auburn
- Bainbridge Island
- Beaux Arts Village
- Bellevue
- Black Diamond
- Bonney Lake
- Bothell
- Bremerton
- Buckley
- Burien
- Carnation
- Clyde Hill
- Covington
- Darrington
- Des Moines
- DuPont
- Duvall
- Eatonville
- Edgewood
- Edmonds
- Enumclaw
- Everett
- Federal Way
- Fife
- Fircrest
- Gig Harbor
- Granite Falls
- Hunts Point
- Issaquah
- Kenmore
- Kent
- Kirkland
- Lake Forest Park
- Lake Stevens
- Lakewood
- Lynnwood
- Maple Valley
- Marysville
- Medina
- Mercer Island
- Mill Creek
- Milton
- Monroe
- Mountlake Terrace
- Muckleshoot Indian Tribe
- Mukilteo
- Newcastle
- Normandy Park
- North Bend
- Orting
- Pacific
- Port Orchard
- Poulsbo
- Puyallup
- Puyallup Tribe of Indians
- Redmond
- Renton
- Roy
- Ruston
- Sammamish
- SeaTac
- Seattle
- Shoreline
- Skykomish
- Snohomish
- Snoqualmie
- Stanwood
- Steilacoom
- Sultan
- Sumner
- Tacoma
- The Suquamish Tribe
- Tukwila
- Tulalip Tribes
- University Place
- Wilkeson
- Woodinville
- Woodway
- Yarrow Point
Statutory Members
- Port of Bremerton
- Port of Everett
- Port of Seattle
- Port of Tacoma
- Washington State Department of Transportation
- Washington Transportation Commission
Associate Members
- Alderwood Water & Wastewater District
- Cascade Water Alliance
- Port of Edmonds
- Island County
- Puget Sound Partnership
- Snoqualmie Tribe
- Thurston Regional Planning Council
- University of Washington
- Washington State University
Transit Agencies
- Community Transit
- Everett Transit
- Kitsap Transit
- Metro (King County)
- Pierce Transit
- Sound Transit