| West Ham Upton (1918 - 1950) |
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| Westmeath (1918 - 1922) |
Constituency of same name also existed 1832-1885 |
| Westminster Abbey (1918 - 1950) |
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| Westminster St George's (1918 - 1950) |
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| Westmorland (1918 - 1983) |
Constituency of same name also existed 1832-1885. |
| Weston-super-Mare (1918) |
Full name (in Craig 3,4) Somerset, Weston-super-Mare |
| Willesden East (1918 - 1974) |
Constituency first used at the February General election of 1974 (28/02/1974). |
| Willesden West (1918 - 1974) |
Constituency first used at the February General election of 1974 (28/02/1974). |
| Wolverhampton Bilston (1918 - 1950) |
|
| Woodford (1918 - 1974) |
Constituency first used at the February General election of 1974 (28/02/1974). |
| Wood Green (1918 - 1974) |
Constituency first used at the February General election of 1974 (28/02/1974). Full name (in Craig 3) Middlesex, Wood Green |
| Woolwich East (1918 - 1974) |
Constituency first used at the February General election of 1974 (28/02/1974). |
| Woolwich West (1918 - 1974) |
Constituency first used at the February General election of 1974 (28/02/1974). |
| Workington (1918 - 2024) |
Full name (in Craig 3,4) Cumberland, Workington |
| Worthing (1918 - 1997) |
Full name (in Craig 3) Sussex (West), Worthing |
| Wrekin, The (1918) |
Full name (in Craig 3,4) Shropshire, The Wrekin |
| Wrexham (1918) |
Full name (in Craig 3,4) Denbighshire, Wrexham |
| Yeovil (1918) |
Full name (in Craig 3,4) Somerset, Yeovil |