William Phelps may refer to: Bill Phelps (1934–2019), Lieutenant Governor of Missouri William Phelps (colonist) (1599–1672), one of the founders of Windsor, Connecticut William Phelps (priest) (1797–1867), Church of England cleric William E. Phelps (1835–?), American politician from Illinois William F. Phelps (1822–1907), educational pioneer and author William H. Phelps Sr. (1875–1965), American ornithologist and businessman. William H. Phelps Jr. (1902–1988), Venezuelan ornithologist and businessman. William J. Phelps (1808–1883), Illinois legislator William Lyon Phelps (1865–1943), American author and critic William Preston Phelps (1848–1917), American landscape painter William Wallace Phelps (1826–1873), United States Representative from Minnesota William Walter Phelps (1839–1894), United States Representative from New Jersey W. W. Phelps (Mormon) (1792–1872), early convert and leader in the Latter Day Saint movement M. William Phelps (born 1968), American crime writer and investigative journalist