William Irwin

William, Will, Bill, or Billy Irwin may refer to:

Law and politics

• William W. Irvin or Irwin (1778–1842), American politician in Ohio
• William W. Irwin (1803–1856), American politician in Pittsburgh, Pennsylvania
• William Irwin (California politician) (1827–1886), American politician in California
• William Irwin (Unionist politician) (born 1956), Unionist politician in Northern Ireland
• Bill Irwin (politician), American politician in Missouri

Sports

• Bill Irwin (baseball) (1859–1933), American baseball player
• Billy Irwin (Australian rules footballer) (1884–1946), Australian footballer
• Bill Irwin (skier) (1920–2013), Canadian skier
• Bill Irwin (footballer) (born 1951), Northern Irish footballer
• Bill Irwin (wrestler) (born 1954), American professional wrestler
• Billy Irwin (boxer) (born 1968), Canadian boxer

Others

• Will Irwin (1873–1948), American journalist
• William Andrew Irwin (1884–1967), Canadian theologian
• William Roy Irwin (1898–1969), Canadian-born World War I flying ace
• William Arthur Irwin (1898–1999), Canadian journalist and diplomat
• William C. K. Irwin (1907–1998), American pianist, conductor, and songwriter
• Bill Irwin (priest) (1928–2004), Canadian priest
• Bill Irwin (born 1950), American actor and clown
• William Irwin (philosopher) (born 1970), American professor of philosophy
• William G. Irwin (1843–1914), capitalist and sugar planter in the Kingdom of Hawai'i

See also

• Bill Erwin (1914–2010), American character actor
• Billie Irwin (1942–2025), New Zealand netball player
• William Irvin (disambiguation)
• William Irvine (disambiguation)
• William Irving (disambiguation)
• William Irwin Thompson (born 1938), social philosopher, cultural critic and poet
• Irwin (surname)