| Streatham and Croydon North |
|
| Stretford |
Full name (in Craig 2,3) Lancashire, Stretford |
| Stretford and Urmston |
|
| Stroud |
Full name (in Craig 2,3,4) Gloucestershire, Stroud |
| Sudbury |
Full name (in Craig 2,3) Suffolk (West), Sudbury. Constituency of same name also existed 1832-1844. |
| Sudbury |
Disenfranchised 1844 due to bribery. Constituency of same name reformed 1885. |
| Sudbury and Woodbridge |
Full name (in Craig 4) Suffolk, Sudbury and Woodbridge |
| Suffolk Central |
|
| Suffolk Central and Ipswich North |
|
| Suffolk Coastal |
|
| Suffolk Eastern |
|
| Suffolk South |
|
| Suffolk West |
|
| Suffolk Western |
|
| Sunderland |
|
| Sunderland Central |
|
| Sunderland North |
|
| Sunderland South |
|
| Surbiton |
Constituency first used at the February General election of 1974 (28/02/1974). Constituency of same name also existed 1983-1997. |
| Surbiton |
Constituency of same name also existed 1950-1974ยน. |
| Surrey East |
|
| Surrey Eastern |
|
| Surrey Heath |
|
| Surrey Mid |
|
| Surrey North West |
Constituency first used at the February General election of 1974 (28/02/1974). |