 He was married twice, firstly in August 1855 to Harriet Hilsden "née" Bray (Gustavus Brooke's sister-in-law, died 2 September 1859), and then on 4 June 1861 to her daughter Lucy Hilsden, who survived him with their two sons and five daughters.Two of the three daughters of his first marriage also survived Coppin.His daughter Blanche Brooke Coppin married George Rossi Ashton (born 1857), a well-known black-and-white artist and brother of Julian Ashton, in Melbourne on 23 October 1883.