A county constituency in Northern Ireland.
Geographic code: N05000015
Notional elections
Constituency area formation
South Down (start date dependent on next dissolution) was formed from:
- Part of South Down (13 April 2010 - )
- Part of Upper Bann (13 April 2010 - )
- Part of Newry and Armagh (13 April 2010 - )
- Part of Lagan Valley (13 April 2010 - )
- Part of Strangford (13 April 2010 - )