<noinclude>The following list of Washington companies includes notable companies that are, or once were, headquartered in the U.S. state of Washington.
Companies based in Washington A Alaska Airlines Amazon ArenaNet Audiosocket Avast! Recording Company Avista
B Banfield Pet Hospital Banner Bank Bartell Drugs Big Fish Games Books4cars Burgerville Blue Origin
C Chateau Ste. Michelle Costco
D Darigold Dick's Drive-In
E Expedia Group Expeditors International ExtraHop Networks
F Focus Designs Funko Filson
G Getty Images GiftTree
H Haggen Hi-School Pharmacy HomeStreet Bank Horizon Air
I I Can Has Cheezburger? Innersloth Itron Ivar's
J John L. Scott Jones Soda
K Kitsap Bank
L Liberty Orchards LiquidPlanner LMN Architects Lollar Pickups
M Microsoft MOD Pizza MTR Western
N Nautilus, Inc. Nintendo of America Nordstrom
P PACCAR Pacific Research Laboratories Papa Murphy's PCC Community Markets PeaceHealth Planetary Resources Premera Blue Cross
Q QFC Qualtrics
R Rainier Mountaineering Red Canoe Credit Union Redfin Recreational Equipment, Inc. Rosauers Supermarkets Russell Investments
S SAFE Boats International Savers The Seattle Times Company Seattle's Best Coffee Simpson Investment Company Slalom Consulting Starbucks Stemilt Growers Symetra
T Tableau Software Talking Rain Taylor Shellfish Company Tim's Cascade Snacks T-Mobile US Tommy Bahama Trident Seafoods Tully's Coffee
U Uwajimaya
V Valve
W WaFd Bank Walk Score Washington Trust Bank Weyerhaeuser WhitePages Windermere Real Estate
Y Yoke's Fresh Market
Z Zillow Zumiez ZymoGenetics
Companies formerly based in Washington 0-9 43 Things
B Boeing Branded Entertainment Network
E EMC Isilon
G Group Health Cooperative
J JanSport
K Kaiser Aluminum Kaiser Permanente
Q Qliance
U UPS
R Red Robin
T Terra Bite Lounge
References