William Cobb

William Cobb may refer to:
 * William Cobb (designer), designer and engineer of rollercoasters
 * William H. Cobb, politician and father of baseball player Ty Cobb
 * William J. Cobb, best known as Happy Humphrey, the heaviest professional wrestler of all time
 * William Cobb (photographer), British photographer
 * William T. Cobb (1857–1937), Governor of Maine, 1905–1909
 * William Jelani Cobb (born 1969), American author and educator
 * William Montague Cobb (1906–1990), physical anthropologist
 * William Cobb (Eureka character), a character on the American science fiction drama Eureka
 * William Peyton Cobb (1880–1963), Secretary of State of Alabama
 * Will D. Cobb (1876–1930), American lyricist and composer
 * Willie Cobb (fl. 1908–1909), American baseball player
 * Billy Cobb (born 1940), English former footballer active in the 1960s
 * William Cobb, a member of the Court of Owls.