Arthur Lucas Harrold (18 Dec 1854 – c. 25 July 1908) was a businessman and politician in South Australia. He was later jailed for serious financial offences. Arthur was born in Fullarton, South Australia, the eldest son of Joseph Harrold (c. 1821 – c. 5 April 1891) and around 1857 the family returned to England. He was educated at the Apsley Guise School and King's College London, where he graduated AKC. In 1875 he and his brother Ernest returned to Adelaide to take over the firm of Harrold Brothers, which had been founded by their father and his brother Daniel around 1854. Their father founded and managed the London office, then around 1884 retired to his home Wanstead Hall, in Wanstead, Essex.