 In 1897 he married Helen Donnelly (d. 1936), the daughter of Denis Donnelly, who survived him with a son, Arthur, and a daughter, Ellen.Coghlan left them an estate of the value of £43,197.Coghlan was awarded the Imperial Service Order (ISO) in 1903, was knighted in 1914 and created a Knight Commander of the Order of St Michael and St George (KCMG) in 1918.