William Irwin

William Irwin or Bill Irwin may refer to:


 * Bill Irwin (wrestler) (born 1954), American professional wrestler
 * Bill Irwin (born 1950), American actor and clown
 * Bill Irwin (footballer) (born 1951), Northern Irish ex-footballer
 * Billy Irwin (Australian rules footballer) (1884–1946), Australian footballer
 * Bill Irwin (priest) (1928–2004), Canadian priest
 * Bill Irwin (baseball) (1859–1933), baseball player
 * Bill Irwin (skier) (1920–2013), former Canadian skier
 * Will Irwin (1873–1948), American author
 * William Irwin (California politician) (1827–1886), California politician from the Democratic Party
 * William Andrew Irwin (1884–1967), theologian
 * William Arthur Irwin (1898–1999), Canadian journalist and diplomat
 * William C. K. Irwin (1907–1998), a.k.a. Will Irwin, American pianist, conductor, and songwriter
 * William Irwin (philosopher) (born 1970), professor of philosophy at King's College in Wilkes-Barre, Pennsylvania
 * William Irwin (boxer) (born 1968), Canadian boxer
 * William Irwin (Unionist politician) (born 1956), Unionist politician in Northern Ireland
 * William W. Irwin (1803–1856), Mayor of Pittsburgh
 * William W. Irvin or Irwin (1778–1842), Ohio politician
 * William Roy Irwin (1898–1969), Canadian-born World War I flying ace