| Paisley and Renfrewshire North | Alison Taylor | Labour | 4 July 2024 |
| Paisley and Renfrewshire South | Johanna Baxter | Labour | 4 July 2024 |
| Peckham | Miatta Fahnbulleh | Labour (Co-op) | 4 July 2024 |
| Pendle and Clitheroe | Jonathan Hinder | Labour | 4 July 2024 |
| Penistone and Stocksbridge | Dr Marie Tidball | Labour | 4 July 2024 |
| Penrith and Solway | Markus Campbell-Savours | Labour | 4 July 2024 |
| Perth and Kinross-shire | Pete Wishart | Scottish National Party | 7 June 2001 |
| Peterborough | Andrew Pakes | Labour (Co-op) | 4 July 2024 |
| Plymouth Moor View | Fred Thomas | Labour | 4 July 2024 |
| Plymouth Sutton and Devonport | Luke Pollard | Labour (Co-op) | 8 June 2017 |
| Pontefract, Castleford and Knottingley | Yvette Cooper | Labour | 1 May 1997 |
| Pontypridd | Alex Davies-Jones | Labour | 12 December 2019 |
| Poole | Neil Duncan-Jordan | Labour | 4 July 2024 |
| Poplar and Limehouse | Apsana Begum | Labour | 12 December 2019 |
| Portsmouth North | Amanda Martin | Labour | 4 July 2024 |
| Portsmouth South | Stephen Morgan | Labour | 8 June 2017 |
| Preston | Sir Mark Hendrick | Labour (Co-op) | 23 November 2000 |
| Putney | Fleur Anderson | Labour | 12 December 2019 |