| Strangford |
|
| Stratford and Bow |
|
| Stratford-on-Avon |
Full name (in Craig 2) Warwickshire, Stratford-on-Avon; in Craig 4 Warwickshire, Stratford. Seat of same name reformed 1950. |
| Stratford-on-Avon |
Seat of same name existed 1885-1918. |
| Strathkelvin and Bearsden |
|
| Streatham |
|
| 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. |