William Davenport Hare (September 1, 1834 – February 6, 1910) was an American politician in Oregon. He served as a Republican member of the Oregon Legislature and the 8th mayor of Hillsboro, Oregon. His other duties included those of customs collector and presidential elector. A native of what was Virginia, his grandfather was a member of the United States Congress, while several of his descendants would also serve in the Oregon Legislature.