| Caerfyrddin | Ann Davies | Plaid Cymru | 4 July 2024 |
| Caerphilly | Chris Evans | Labour (Co-op) | 6 May 2010 |
| Caithness, Sutherland and Easter Ross | Jamie Stone | Liberal Democrat | 8 June 2017 |
| Calder Valley | Josh Fenton-Glynn | Labour | 4 July 2024 |
| Camborne and Redruth | Perran Moon | Independent | 4 July 2024 |
| Cambridge | Daniel Zeichner | Labour | 7 May 2015 |
| Cannock Chase | Josh Newbury | Labour | 4 July 2024 |
| Canterbury | Rosie Duffield | Independent | 8 June 2017 |
| Cardiff East | Jo Stevens | Labour | 7 May 2015 |
| Cardiff North | Anna McMorrin | Labour | 8 June 2017 |
| Cardiff South and Penarth | Stephen Doughty | Labour (Co-op) | 15 November 2012 |
| Cardiff West | Mr Alex Barros-Curtis | Labour | 4 July 2024 |
| Carlisle | Ms Julie Minns | Labour | 4 July 2024 |
| Carshalton and Wallington | Bobby Dean | Liberal Democrat | 4 July 2024 |
| Castle Point | Rebecca Harris | Conservative | 6 May 2010 |
| Central Ayrshire | Alan Gemmell | Labour | 4 July 2024 |
| Central Devon | Sir Mel Stride | Conservative | 6 May 2010 |
| Central Suffolk and North Ipswich | Patrick Spencer | Conservative | 4 July 2024 |
| Ceredigion Preseli | Ben Lake | Plaid Cymru | 8 June 2017 |
| Chatham and Aylesford | Tristan Osborne | Labour | 4 July 2024 |
| Cheadle | Tom Morrison | Liberal Democrat | 4 July 2024 |
| Chelmsford | Marie Goldman | Liberal Democrat | 4 July 2024 |
| Chelsea and Fulham | Ben Coleman | Labour | 4 July 2024 |
| Cheltenham | Max Wilkinson | Liberal Democrat | 4 July 2024 |
| Chesham and Amersham | Sarah Green | Liberal Democrat | 17 June 2021 |
| Chester North and Neston | Samantha Dixon | Labour | 1 December 2022 |
| Chester South and Eddisbury | Aphra Brandreth | Conservative | 4 July 2024 |
| Chesterfield | Mr Toby Perkins | Labour | 6 May 2010 |
| Chichester | Jess Brown-Fuller | Liberal Democrat | 4 July 2024 |
| Chingford and Woodford Green | Sir Iain Duncan Smith | Conservative | 9 April 1992 |
| Chippenham | Sarah Gibson | Liberal Democrat | 4 July 2024 |
| Chipping Barnet | Dan Tomlinson | Labour | 4 July 2024 |
| Chorley | Sir Lindsay Hoyle | Speaker | 1 May 1997 |
| Christchurch | Sir Christopher Chope | Conservative | 1 May 1997 |
| Cities of London and Westminster | Rachel Blake | Labour (Co-op) | 4 July 2024 |
| City of Durham | Mary Kelly Foy | Labour | 12 December 2019 |
| Clacton | Nigel Farage | Reform UK | 13 August 2026 |
| Clapham and Brixton Hill | Bell Ribeiro-Addy | Labour | 12 December 2019 |
| Clwyd East | Becky Gittins | Labour | 4 July 2024 |
| Clwyd North | Gill German | Labour | 4 July 2024 |
| Coatbridge and Bellshill | Frank McNally | Labour | 4 July 2024 |
| Colchester | Pam Cox | Labour | 4 July 2024 |
| Colne Valley | Paul Davies | Labour | 4 July 2024 |
| Congleton | Sarah Russell | Labour | 4 July 2024 |
| Corby and East Northamptonshire | Lee Barron | Labour | 4 July 2024 |
| Coventry East | Mary Creagh | Labour | 4 July 2024 |
| Coventry North West | Taiwo Owatemi | Labour | 12 December 2019 |
| Coventry South | Zarah Sultana | Your Party | 12 December 2019 |
| Cowdenbeath and Kirkcaldy | Melanie Ward | Labour | 4 July 2024 |
| Cramlington and Killingworth | Emma Foody | Labour (Co-op) | 4 July 2024 |
| Crawley | Peter Lamb | Labour | 4 July 2024 |
| Crewe and Nantwich | Connor Naismith | Labour | 4 July 2024 |
| Croydon East | Natasha Irons | Labour | 4 July 2024 |
| Croydon South | Chris Philp | Conservative | 7 May 2015 |
| Croydon West | Sarah Jones | Labour | 8 June 2017 |
| Cumbernauld and Kirkintilloch | Katrina Murray | Labour | 4 July 2024 |