South Durham, formally the Southern Division of Durham and often referred to as Durham Southern, was a county constituency of the House of Commons of the Parliament of the United Kingdom. It elected two Members of Parliament (MPs) by the bloc vote system of election.
Boundaries 1832-1885: The Wards of Darlington and Stockton. 
In 1832 the historic county of
Durham, in north east England, was split for parliamentary purposes into two county divisions. These were the South division (with a place of election at Darlington) and North Durham (where voting took place at the city of Durham). Each division returned two members to Parliament.
There were no parliamentary boroughs enclaved in the area of the South division, between 1832 and 1885, so no non-resident 40 shilling freeholders voted in the county constituency.
(Source: Stooks Smith).
In 1885 this division was abolished, when the North and South Durham county divisions were replaced by eight new single-member county constituencies. These were
Barnard Castle, Bishop Auckland, Chester-le-Street, Houghton-le-Spring, Jarrow, Mid Durham, North West Durham and South East Durham. In addition there were seven County Durham borough constituencies.
Members of Parliament
Elections in the 1840s
Elections in the 1850s
Elections in the 1860s
Elections in the 1870s
Elections in the 1880s
"The statutes of the United Kingdom of Great Britain and Ireland. 2 & 3 William IV. Cap. LXIV. An Act to settle and describe the Divisions of Counties, and the Limits of Cities and Boroughs, in England and Wales, in so far as respects the Election of Members to serve in Parliament". London: His Majesty's statute and law printers. 1832. pp. 300-383 . Retrieved .
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Stooks Smith, Henry. (1973) [1844-1850]. Craig, F. W. S. (ed.). (2nd ed.). Chichester: Parliamentary Research Services. p. 98. The Parliaments of England ISBN . 0-900178-13-2
Turnbull, Richard (2019). "Quarkers, Free Trade and Social Responsibility". In Burton, Nicholas; Turnbull, Richard (eds.). Quakers, Business and Corporate Responsibility: Lessons and Cases for Responsible Management. CSR, Sustainability, Ethics & Governance. Cham: Springer Nature Switzerland. p. 99. doi: 10.1007/978-3-030-04034-5. ISBN . 978-3-030-04033-8 LCCN 2018966594 . Retrieved 2019 – via Google Books.
. "South Durham Election" Newcastle Journal. 11 April 1857. p. 5 . Retrieved 2018 – via British Newspaper Archive.
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. 24 April 1857. p. 5 "Evening Mail" . Retrieved 2018 – via British Newspaper Archive.
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. "(From the London Guardian)" Staffordshire Advertiser. 11 April 1857. p. 6 . Retrieved 2018 – via British Newspaper Archive.
^ a b c d e f g h i
Craig, F. W. S., ed. (1977). British Parliamentary Election Results 1832-1885 (e-book) (1st ed.). London: Macmillan Press. p. 384. ISBN . 978-1-349-02349-3
. "South Durham Election" Durham Chronicle. 20 November 1868. p. 5 . Retrieved 2018 – via British Newspaper Archive.
Leigh Rayment's Historical List of MPs - Constituencies beginning with "D" (part 4)
Boundaries of Parliamentary Constituencies 1885-1972, compiled and edited by F.W.S. Craig (Parliamentary Reference Publications 1972)
British Parliamentary Election Results 1832-1885, compiled and edited by F.W.S. Craig (Macmillan Press 1977)
The Parliaments of England by Henry Stooks Smith (1st edition published in three volumes 1844-50), second edition edited (in one volume) by F.W.S. Craig (Political Reference Publications 1973)
Who's Who of British Members of Parliament: Volume I 1832-1885, edited by M. Stenton (The Harvester Press 1976) Who's Who of British Members of Parliament, Volume II 1886-1918, edited by M. Stenton and S. Lees (Harvester Press 1978)