John Singleton, Australian businessman

John Desmond Singleton (born 9 November 1941) is an Australian entrepreneur. He built his success and wealth in the advertising business in Australia in the 1970s and 1980s. He now has diverse investment interests in radio broadcasting, publishing and thoroughbred breeding and racing.

In 2019, Singleton sold his 32.2% stake in Macquarie Media for A$80 million, to Nine Entertainment.