Quaint historic towns around Washington & Oregon

Astoria while not being small has some great older sections. The maritime museum is second to none, the column, waterfront trolley and all of the Lewis and Clark interpretive centres are excellent.
Old town Portland, Voodoo donuts the Saturday market are interesting.

Old town Mcminville is kind of unique.The Evergreen Aviation museum is awesome if you are into aviation and space history
There are also many quaint and unigue little towns along the Oregon coast. Just a matter of finding them and enjoying