S
| Sanders, Adrian Torbay | LD |
| Sandys, Laura Thanet South | C |
| Sarwar, Anas Glasgow Central | Lab |
| Scott, Lee Ilford North | C |
| Seabeck, Alison Plymouth Moor View | Lab |
| Selous, Andrew Bedfordshire South West | C |
| Shannon, Jim Strangford | DUP |
| Shapps, Grant Welwyn Hatfield | C |
| Sharma, Virendra Ealing Southall | Lab |
| Sharma, Alok Reading West | C |
| Sheerman, Barry Huddersfield | Lab |
| Shelbrooke, Alec Elmet & Rothwell | C |
| Shepherd, Richard Aldridge-Brownhills | C |
| Sheridan, Jim Paisley & Renfrewshire North | Lab |
| Shuker, Gavin Luton South | Lab |
| Simmonds, Mark Boston & Skegness | C |
| Simpson, Keith Broadland | C |
| Simpson, Thomas David Upper Bann | DUP |
| Singh, Marsha Bradford West | Lab |
| Skidmore, Chris Kingswood | C |
| Skinner, Dennis Bolsover | Lab |
| Slaughter, Andy Hammersmith | Lab |
| Smith, Sir Robert Aberdeenshire West & Kincardine | LD |
| Smith, Nick Blaenau Gwent | Lab |
| Smith, Henry Crawley | C |
| Smith, Chloe Norwich North | C |
| Smith, Andrew Oxford East | Lab |
| Smith, Angela Penistone & Stocksbridge | Lab |
| Smith, Owen Pontypridd | Lab |
| Smith, Julian Skipton & Ripon | C |
| Soames, Nicholas Sussex Mid | C |
| Soubry, Anna Broxtowe | C |
| Soulsby, Sir Peter Leicester South | Lab |
| Spellar, John Warley | Lab |
| Spelman, Caroline Meriden | C |
| Spencer, Mark Sherwood | C |
| Stanley, Sir John Tonbridge & Malling | C |
| Stephenson, Andrew Pendle | C |
| Stevenson, John Carlisle | C |
| Stewart, Bob Beckenham | C |
| Stewart, Iain Milton Keynes South | C |
| Stewart, Rory Penrith & The Border | C |
| Straw, Jack Blackburn | Lab |
| Streeter, Gary Devon South West | C |
| Stride, Mel Devon Central | C |
| Stringer, Graham Blackley & Broughton | Lab |
| Stuart, Graham Beverley & Holderness | C |
| Stuart, Gisela Birmingham Edgbaston | Lab |
| Stunell, Andrew Hazel Grove | LD |