Below are lists of DUP marginal seats showing which constituencies won in the latest elections can be most easily lost.
Historical
Below is the DUP defence list consisting of DUP held marginal seats for the 2029 general election based on the 2024 boundaries. These marginal constituencies are ordered from the most vulnerable seats to the safest.
| Rank | Constituency | Region | Majority | Swing to Defeat | |
|---|---|---|---|---|---|
| 1. | Londonderry East | Northern Ireland | 179 | 0.22% | |
| 2. | Antrim East | Northern Ireland | 1,306 | 1.65% | |
| 3. | Belfast East | Northern Ireland | 2,676 | 3.13% | |
| 4. | Strangford | Northern Ireland | 5,131 | 6.59% | |
| 5. | Upper Bann | Northern Ireland | 7,406 | 7.82% |