| Clwyd South West | |
|---|---|
| Former county constituency for the House of Commons | |
| Preserved county | Clwyd |
| Major settlements | Denbigh, Llangollen, Rhosllanerchrugog, Ruthin |
| 1983–1997 | |
| Seats | One |
| Created from | Denbigh, Wrexham and Merioneth[1] |
| Replaced by | Clwyd South, Clwyd West and Vale of Clwyd[1] |
Clwyd South West (Welsh: De-orllewin Clwyd) was a county constituency in Clwyd, North Wales. It returned one Member of Parliament (MP) to the House of Commons of the Parliament of the United Kingdom by the first past the post system of election.
The constituency was created for the 1983 general election, and abolished for the 1997 general election. It was a marginal seat throughout its lifetime.