Climate Party By-elections
| Election | Constituency | Candidate | Vote count | Vote share | Position |
| 8 October 2026 | Holborn and St Pancras | Clare Fischer | 51 | 0.2% | 11th |
| 18 June 2026 | Makerfield | Ed Gemmell | 18 | 0.0% | 11th |
| 20 July 2023 | Selby and Ainsty | Luke Wellock | 39 | 0.1% | 13th |
| 20 July 2023 | Uxbridge and South Ruislip | Ed Gemmell | 49 | 0.2% | 15th |