| Founded | 1995 |
|---|---|
| No. of teams | 12 |
| Country | Wales |
| Most recent champion(s) | Newcastle Emlyn RFC (2014–15) |
| Level on pyramid | 2 |
| Promotion to | Welsh Championship |
| Relegation to | WRU Division Two West |
| Official website | www |
 | This article needs to be updated. (September 2022) |
The Welsh Rugby Union Division One West (also called the SWALEC Division One West for sponsorship reasons) is a rugby union league in Wales first implemented for the 1995/96 season. The league was formed in 2006 when the WRU divided the old Division One into two leagues, West and East