Arthur Aloysius Fox (22 October 1847 – 11 April 1901) was a landowner and politician in the colony of South Australia. He was the only son of Rundle Street auctioneer Arthur Fox (c. 1814 – 1 May 1853) and his wife Frances Ellen Fox née Nihill (c. 1826 – 25 May 1895), who established the property "Marybank" near Athelstone (also mentioned in connection with Hectorville), profited handsomely from shares in the Kapunda and Burra copper mines, and died from accidental drowning. Frances Ellen's sister Mary Nihill (c. 1811–1893) married Daniel Michael Paul Cudmore (1811–1891) around 1835.