William Joyce (1906–1946) was a Second World War propagandist, nicknamed "Lord Haw-Haw".
William Joyce may also refer to:
Bill Joyce (baseball) (1865–1941), American professional baseball player Bill Joyce (1877–?), Scottish association footballer Bill Joyece, quarterback for the Detroit Heralds in 1920 W. Seavey Joyce (1913–1988), American Catholic priest Willie Joyce, American boxer and the 1936 National AAU Bantamweight champion William Joyce (actor) (1930–1998), American actor Billy Joyce (Gaelic footballer) (1950–2025), Irish former Gaelic footballer Billy Joyce (wrestler) (1916–2000), English professional wrestler William Joyce (writer) (born 1959), American author, illustrator and filmmaker