| Wick District of Burghs |
|
| Wicklow |
|
| Wicklow East |
|
| Wicklow West |
|
| Widnes |
Full name (in Craig 2,3,4) Lancashire, Widnes |
| Wigan |
|
| Wigtown District of Burghs |
|
| Wigtownshire |
|
| Willesden East |
|
| Willesden West |
|
| Wilton |
Full name (in Craig 2) Wiltshire, Wilton |
| Wiltshire North |
|
| Wiltshire Northern |
|
| Wiltshire Southern |
|
| Wimbledon |
Full name (in Craig 2) Surrey, Wimbledon |
| Winchester |
Full name (in Craig 3,4) Hampshire, Winchester |
| Windsor |
Full name (in Craig 3,4) Berkshire, Windsor. Constituency of same name reformed 1997. |
| Windsor |
Constituency of same name also existed 1832- |
| Windsor and Maidenhead |
|
| Wirral |
Full name (in Craig 2,3,4) Cheshire, Wirral |