John Darling and Son was an Australian wheat merchant and flour milling company founded in Adelaide, South Australia, for many years the largest in Australia. It was founded by John Darling Sr. (1831–1905), a businessman of Scottish origin, and Member of Parliament for 25 years. He was succeeded by his eldest son, John Darling, Jr. (1852–1914), also a Member of Parliament, then by Harold Gordon Darling. It was registered as a private company in Victoria in 1953 with three directors: Norman Darling, Leonard Darling, and Leonard Gordon Darling.