Democratic Unionist Party By-elections
| Election | Constituency | Candidate | Vote count | Vote share | Position |
| 3 May 2018 | West Tyrone | Thomas Buchanan | 8,390 | 24.0% | 2nd |
| Election | Constituency | Candidate | Vote count | Vote share | Position |
| 3 May 2018 | West Tyrone | Thomas Buchanan | 8,390 | 24.0% | 2nd |