| Surbiton |
Constituency of same name also existed 1950-1974ยน. |
| Surrey East |
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| Surrey Eastern |
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| Surrey Heath |
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| Surrey Mid |
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| Surrey North West |
Constituency first used at the February General election of 1974 (28/02/1974). |
| Surrey South West |
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| Surrey Western |
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| Sussex Eastern |
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| Sussex Mid |
Constituency first used at the February General election of 1974 (28/02/1974). |
| Sussex Weald |
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| Sussex Western |
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| Sutherland |
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| Sutton and Cheam |
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| Sutton Carshalton |
Constituency first used at the February General election of 1974 (28/02/1974). |
| Sutton Coldfield |
Full name (in Craig 3,4) Warwickshire, Sutton Coldfield. Craig (4) 511 until 1955 revision. |
| Sutton Sutton and Cheam |
Constituency first used at the February General election of 1974 (28/02/1974). |
| Swansea District of Boroughs |
Check whether this constituency continues in 1885, or whether 'Swansea District' in Craig 3 is a boundary revision. |
| Swansea East |
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| Swansea Town |
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| Swansea West |
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| Swindon |
Full name (in Craig 3) Wiltshire, Swindon |
| Swindon North |
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| Swindon South |
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| Tamworth |
Constituency of same name also existed 1832-1945. |