Dickinson married in 1835 Caroline Carey (died 1897), his first cousin. She was daughter of Major-General Thomas Carey of the 3rd Foot Guards, and his first wife Caroline Smith, daughter of Samuel Smith MP of Woodhall Park; they had three sons and two daughters.[4][5] Their children included:[4]
William Dickinson (born 1839), married in 1875 Helena Isabella Bairnsfather (died 1888), daughter of George Bairnsfather of the East India Company; and then in 1896 Isabel Frances Harison, daughter of Colonel Evanson Harison R.A.
Reginald Dickinson (born 1841).
Arthur Dickinson (born 1847), married in 1873 Alice Berkeley Woodforde, daughter of Augustus Woodforde and widow of the Rev. George Goodden.
Sophia Caroline.
Frances.
Lucy, who married in 1866 William Henry Dorien-Magens (died 1875); then in 1888 the Rev. Iltyd Jenkin Rosser.
^Terry Jenkins (2009). D.R. Fisher (ed.). "DICKINSON, William (1771-1837)". The History of Parliament: the House of Commons 1820–1832. Cambridge University Press. Retrieved 28 November 2016.