William Gallagher

William Gallagher may refer to:

• William Gallagher (baseball) (1874–1950), baseball player
• William Gallagher (civil servant) (1851–1933), British civil servant
• William Gallagher (politician) (1875–1946), U.S. Representative from Minnesota
• William Gallagher (writer), British writer and journalist
• William Davis Gallagher (1808–1894), American journalist and poet
• William J. Gallagher (colonel), president of Riverside Military Academy in Gainesville, Georgia
• William M. Gallagher (1923–1975), Pulitzer Prize-winning photographer
• Bill Gallagher (baseball) (1863–1890), US baseball player
• Bill Gallagher (inventor) (Alfred William Gallagher, 1911–1990), New Zealand businessman and inventor
• Billy Gallagher (chef) (1948–2016), chef and businessman in South Africa
• Billy Gallagher (footballer) (1885–1959), Australian rules footballer
• Billy Zero (William Gallagher, born 1971), radio and TV host
• Liam Gallagher (William John Paul Gallagher, born 1972), Oasis singer
• Rory Gallagher (William Rory Gallagher, 1948–1995), Irish blues-rock multi-instrumentalist, songwriter, and bandleader