Constituencies
| Name | Notes |
|---|---|
| Yarmouth | Full name (in Craig 4) Norfolk, Yarmouth |
| Yeovil | Full name (in Craig 3,4) Somerset, Yeovil |
| Ynys Môn | Known as Anglesey until 1983 |
| York | |
| York Central | |
| York Outer | Boundary changes |
| Yorkshire East | |
| Yorkshire (East Riding) | |
| Yorkshire (North Riding) | |
| Yorkshire (West Riding) | |
| Yorkshire (West Riding) Eastern | |
| Yorkshire (West Riding) Northern | |
| Yorkshire (West Riding) Southern | |
| Youghal |