William Fagan

William Fagan may refer to:


 * Willie Fagan (1917–1992), footballer who played for Liverpool
 * William Trant Fagan (1801–1859), Irish writer and Member of Parliament from Cork
 * William Fagan (MP) (1832–1890), Member of the UK Parliament for Carlow Borough
 * Bill Fagan (1869–1930), baseball player