Clwyd South West
| 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 |
| Replaced by | Clwyd South, Clwyd West and Vale of Clwyd |
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.