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