| Founded | 1995 |
|---|---|
| No. of teams | 12 |
| Country | Wales |
| Most recent champion(s) | Maesteg Celtic RFC (2011–12) |
| Level on pyramid | 5 |
| Promotion to | WRU Division Three South West |
| Relegation to | WRU Division Five South West |
| Official website | www |
The Welsh Rugby Union Division Four South West (also called the SWALEC Division Four South West for sponsorship reasons) is a rugby union league in Wales first implemented for the 1995/96 season.