 He remarried on 21 November 1820 to Pamela FitzGerald (1795/1796 - 25 November 1869), the eldest daughter of Lord Edward FitzGerald and Pamela Syms.By her he had four sons, of whom one died in infancy, and six daughters.Campbell was appointed deputy quartermaster-general in Ireland in 1830, and was promoted major-general in 1841, receiving command of the Athlone district.