Austin Chapman, Australian businessman and politician, 4th Australian Minister for Defence (b. 1864)

Sir Austin Chapman (10 July 1864 – 12 January 1926) was an Australian politician who served in the House of Representatives from 1901 until his death in 1926. He held ministerial office in the governments of Alfred Deakin and Stanley Bruce, serving as Minister for Defence (1903–1904), Postmaster-General (1905–1907), Minister for Trade and Customs (1907–1908, 1923–1924), and Minister for Health (1923–1924).