Happy Birthday, Washington Territory! On this day in 1853, Washington Territory was spun off from Oregon. Share this:Click to share on LinkedIn (Opens in new window)Click to share on Twitter (Opens in new window)Click to share on Pinterest (Opens in new window)Click to share on Reddit (Opens in new window)MoreClick to email a link to a friend (Opens in new window)Click to print (Opens in new window)Like this:Like Loading...