An election to the 58th Parliament of the United Kingdom for the constituency area of South Down, held as part of the general election on 12 December 2019.
Sinn Féin hold by Chris Hazzard with a majority of 1,620 - 3.3% - on a turnout of 62.9%.
Candidates
| Name | Party | Vote | Vote share | Vote change |
| HAZZARD, Chris | SF | 16,137 | 32.4% | -7.5% |
| SAVAGE, Michael | SDLP | 14,517 | 29.2% | -6.0% |
| HANNA, Glyn | DUP | 7,619 | 15.3% | -2.1% |
| BROWN, Patrick | APNI | 6,916 | 13.9% | 10.3% |
| MACAULEY, Jill | UUP | 3,307 | 6.6% | 2.7% |
| BRADY, Paul | AONT | 1,266 | 2.5% | - |
Under section 13(b) of the Representation of the People Act 1985, a candidate gaining 5% or less of the vote share will forfeit their deposit.
An electorate of 79,175, having a valid vote count of 49,762 and an invalid vote count of 209.
Result declared at 03:29 on 13 December 2019.