Oaks belong to the genus Quercus and there is one native oak in the Salish Sea along with many introduced species.
Quercus garyanna - Oregon White Oak, Gary Oak
Our native oak, often associated with anthropogenic fire and Oak Woodland and Prairie.
Quercus macrocarpa - Burr Oak
A widely adapted oak, tolerant of urban conditions, with large edible nuts. https://www.fs.fed.us/database/feis/plants/tree/quemac/all.html