| Staffordshire North Western (1885 - 1918) |
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| Staffordshire Western (1868 - 1918) |
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| Stalybridge (1868 - 1918) |
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| Stamford (1832 - 1918) |
Full name (in Craig 2) Lincolnshire, Stamford |
| St Andrews District of Burghs (1832 - 1918) |
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| St Augustine's (1885 - 1918) |
Full name (in Craig 2) Kent, St Augustine's |
| St Austell (1885 - 1918) |
Full name (in Craig 2) Cornwall, St Austell |
| St George's Hanover Square (1885 - 1918) |
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| Stirling District of Burghs (1832 - 1918) |
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| Stirlingshire (1832 - 1918) |
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| Stoke-on-Trent (1832 - 1918) |
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| Stowmarket (1885 - 1918) |
Full name (in Craig 2) Suffolk, Stowmarket |
| St Pancras East (1885 - 1918) |
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| St Pancras South (1885 - 1918) |
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| St Pancras West (1885 - 1918) |
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| Strand (1885 - 1918) |
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| Stratford-on-Avon (1885 - 1918) |
Full name (in Craig 2) Warwickshire, Stratford-on-Avon; in Craig 4 Warwickshire, Stratford. Seat of same name reformed 1950. |
| Sutherland (1832 - 1918) |
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| Swansea District of Boroughs (1832 - 1918) |
Check whether this constituency continues in 1885, or whether 'Swansea District' in Craig 3 is a boundary revision. |
| Swansea Town (1885 - 1918) |
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| Tewkesbury (1832 - 1918) |
Full name (in Craig 2) Gloucestershire, Tewkesbury. Constituency of same name reformed 1997. |
| Tottenham (1885 - 1918) |
Full name (in Craig 2) Middlesex, Tottenham. Constituency of same name also existed 1950-1974ยน, and reformed 1983. |
| Tower Hamlets Bow and Bromley (1885 - 1918) |
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| Tower Hamlets Limehouse (1885 - 1918) |
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| Tower Hamlets Mile End (1885 - 1918) |
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