List of the prehistoric life of Washington

Precambrian
The Paleobiology Database records no known occurrences of Precambrian fossils in Washington.

Paleozoic

 * †Alternifenestella
 * †Alternifenestella vagrantia – type locality for species
 * †Coeloclemis
 * †Coeloclemis urhausenii – type locality for species
 * †Dybowskiella
 * †Dyscritella
 * †Dyscritella iwaizakiensis
 * †Dyscritellina
 * †Fistulamina – tentative report
 * †Fistulipora
 * †Fistuliramus
 * †Fistuliramus pacificus – type locality for species
 * †Hayasakapora
 * †Hayasakapora erectoradiata – or unidentified comparable form
 * †Hyolithellus
 * Kutorgina cingulata.png †[[Kutorgina]]
 * †Mackinneyella
 * †Mackinneyella stylettia – type locality for species
 * †Meekoporella
 * †Meekoporella inflecta – type locality for species
 * †Micromitra
 * †Nematopora
 * †Neoeridotrypella
 * †Neoeridotrypella missionensis – type locality for species
 * NevadiaSp.jpg †[[Nevadia]]
 * †Pamirella
 * †Pamirella oculus – type locality for species
 * †Parapolypora
 * †Pinegopora
 * †Pinegopora petita – type locality for species
 * †Polypora
 * †Polypora arbusca – type locality for species
 * †Polyporella
 * †Pseudobatostomella
 * †Rhombopora – tentative report
 * †Rhombotrypella
 * †Rhombotrypella kettlensis – type locality for species
 * †Sakagamiina – type locality for genus
 * †Sakagamiina easternensis – type locality for species
 * †Stenopora
 * †Streblotrypa – tentative report
 * †Tabulipora
 * †Tabulipora colvillensis – type locality for species
 * †Wjatkella
 * †Wjatkella nanea – type locality for species

Mesozoic

 * †Anchura
 * †Anchura falciformis
 * †Canadoceras
 * †Canadoceras newberryanum
 * †Canadoceras sp.
 * †Desmophyllites
 * †Desmophyllites diphylloides
 * †Dieneroceras
 * †Dieneroceras dieneri – or unidentified comparable form
 * †Epigondolella
 * †Epigondolella abneptis
 * †Fenestracarpa – type locality for genus
 * †Fenestracarpa washingtonensis – type locality for species
 * †Gaudryceras
 * †Gaudryceras denmanense – or unidentified comparable form
 * †Homolsomites
 * †Homolsomites mutabilis
 * †Hoplitoplacenticeras
 * †Hoplitoplacenticeras sp.
 * Inoceramus steenstrup, world's largest fossil mollusk.jpg †[[Inoceramus]]
 * †Inoceramus subundatus
 * †Inoceramus vancouverensis
 * †Juvenites
 * †Juvenites septentrionalis – or unidentified comparable form
 * †Neophylloceras
 * †Neophylloceras ramosum – or unidentified comparable form
 * †Olcostephanus
 * †Olcostephanus pecki – or unidentified comparable form
 * †Owenites
 * †Owenites koeneni
 * Pachydiscus neubergicus cropped.jpg †[[Pachydiscus]]
 * †Pachydiscus buckhami
 * Palaeocypraea
 * †Palaeocypraea suciensis – type locality for species
 * †Pentzia
 * †Pentzia hilgardi
 * †Perissitys
 * †Perissitys brevirostris
 * †Pseudocymia – tentative report
 * †Pseudocymia cahalli
 * †Pseudoxybeloceras
 * †Pseudoxybeloceras lineatum – or unidentified comparable form
 * †Sucia – type locality for genus
 * †Sucia suavis – type locality for species