This is a list of fauna observed in the U.S. state of Washington.

• American robin (Turdus migratorius)
• Chestnut-backed chickadee (Poecile rufescens)
• Spotted towhee (Pipilo maculatus)
• Steller's jay (Cyanocitta stelleri)
• Dark-eyed junco (Junco hyemalis)
• Bald eagle (Haliaeetus leucocephalus)

• Crescent trout (Oncorhynchus clarki crescenti)
• Beardslee trout (Oncorhynchus mykiss irideus var. beardsleei)
• Pink (Humpback) salmon (Oncorhynchus gorbuscha)
• Coho (Silver) salmon (Oncorhynchus kisutch)
• Chinook (King) salmon (Oncorhynchus tshawytscha)
• Sockeye salmon (Oncorhynchus nerka)
• Coastal cutthroat trout (Oncorhynchus clarki clarki)
• Westslope cutthroat trout (Oncorhynchus clarki lewisi)
• Rainbow trout (Oncorhynchus mykiss)
• Dolly Varden trout (Salvelinus malma)
• Bull trout (Salvelinus confluentus)

• Roosevelt elk (Cervus canadensis roosevelti)
• Shrew-mole (Neurotrichus gibbsii)
• American pika (Ochotona princeps)
• Snowshoe hare (Lepus americanus)
• Mountain beaver (Aplodontia rufa)
• Olympic marmot (Marmota olympus)
• Grizzly bear (Ursus arctos horribilis)
• Pygmy rabbit (Brachylagus idahoensis) reintroduced
• Black bear (Ursus americanus)

• List of flora of Washington