William Fish may refer to:
William Fish (Scarborough MP), English member of parliament for Scarborough, 1588–1589 William Fish (musician) (1775–1866), English violinist, organist and composer William H. Fish (1849–1926), associate justice and chief justice of the Supreme Court of Georgia William Fish, mayor of Cape Town, South Africa, 1925–1927 W. B. Fisher (born William Bayne Fish, 1916–1984), British geographer Will Fish (born 2003), English footballer
See also William Fisher (disambiguation) William Fitch (disambiguation) Billy Fish, fictional character in the 1975 film The Man Who Would Be King