South Down is currently held by Sinn Féin, and awaits results.
Results for 2019 are notional estimates based on the new boundaries.
| Votes | Share % | Change %pts. | ||
|---|---|---|---|---|
| Diane Forsythe Democratic Unionist Party | − | − | − | |
| Chris Hazzard Sinn Féin | − | − | − | |
| Colin McGrath Social Democratic and Labour Party | − | − | − | |
| Andrew McMurray Alliance | − | − | − | |
| Jim Wells Traditional Unionist Voice | − | − | − | |
| Rosemary McGlone Aontú | − | − | − | |
| Michael O'Loan Ulster Unionist Party | − | − | − | |
| Declan Walsh Green | − | − | − | |
| Hannah Westropp Conservative | − | − | − |