Social Democratic & Labour Party By-elections
| Election | Constituency | Candidate | Vote count | Vote share | Position |
| 3 May 2018 | West Tyrone | Daniel Christopher McCrossan | 6,254 | 17.9% | 3rd |
| 7 March 2013 | Mid Ulster | Patsy McGlone | 6,478 | 17.4% | 3rd |
| 9 June 2011 | Belfast West | Alex Attwood | 3,088 | 13.5% | 2nd |