William Ellsworth Fisher (1871 – 1937) was an architect who founded the Denver, Colorado firm that became Fisher & Fisher. Fisher's father, Allen S. Fisher, moved to Denver from Clinton, Ontario, Canada, with his family in 1885. William became a draftsman for Balcomb & Rice in Denver in 1890 and then studied briefly with C. Powell Karr in New York. In 1892 he went into business in Denver as William Fisher, Architect. After ten years in solo practise, mainly designing starter homes, he partnered from 1901 to 1905 with Daniel Riggs Huntington, who had also worked for Balcomb & Rice. During this time the firm designed increasingly expensive residences and also commercial buildings. After returning to solo practice for a couple of years, he then partnered with his younger brother Arthur Addiso