campbell was married to charlotte alicia (1793 – 5 january 1860) and had two children, a son and a daughter. his son, major francis eastwood campbell (1823–1911), was clerk of the new zealand house of representatives for 35 years. campbell's granddaughter from his son's marriage to elizabeth ("eliza") susan downing was jessie mary, who married arthur hylton brisco, son of sir robert brisco the 3rd brisco baronet of crofton place.