Below are lists of SDLP target seats showing which constituencies can be most easily won from an opposing party relative to the latest elections.
Below is the list of SDLP target seats for the 2029 general election. The list is ordered from the smallest to the largest swing needed for the seat to change hands.
View SDLP held marginal seats vulnerable at the next general election.
(order by percentage majority)
| Rank | Constituency | Region | Majority over SDLP | Swing Needed | |
|---|---|---|---|---|---|
| 1. | Down South | Northern Ireland | 9,280 | 10.26% | |
| 2. | Londonderry East | Northern Ireland | 6,246 | 14.70% | |
| 3. | Newry and Armagh | Northern Ireland | 15,493 | 16.86% | |
| 4. | Antrim South | Northern Ireland | 14,722 | 17.16% | |
| 5. | Tyrone West | Northern Ireland | 16,890 | 19.33% | |
| 6. | Belfast West | Northern Ireland | 16,691 | 21.00% | |
| 7. | Strangford | Northern Ireland | 13,776 | 22.22% | |
| 8. | Ulster Mid | Northern Ireland | 20,363 | 22.40% | |
| 9. | Antrim North | Northern Ireland | 9,981 | 23.14% | |
| 10. | Antrim East | Northern Ireland | 10,570 | 23.35% | |
| 11. | Belfast North | Northern Ireland | 16,261 | 26.33% | |
| 12. | Upper Bann | Northern Ireland | 20,146 | 26.90% | |
| 13. | Lagan Valley | Northern Ireland | 17,590 | 29.81% | |
| 14. | Down North | Northern Ireland | 20,256 | 29.91% | |
| 15. | Fermanagh and South Tyrone | Northern Ireland | 22,458 | 35.02% | |
| 16. | Belfast East | Northern Ireland | 19,275 | 38.87% | |
View SDLP held marginal seats vulnerable at the next general election.