WRU Division One North
| Founded | 1995 |
|---|---|
| No. of teams | 10 |
| Country | Wales |
| Most recent champion(s) | Nant Conwy RFC (2017–18) |
| Level on pyramid | 2 |
| Promotion to | Top tier |
| Relegation to | WRU Division Two North |
| Official website | www |
The Welsh Rugby Union Division One North (also called the SWALEC Division One North for sponsorship reasons) is a rugby union league in Wales first implemented for the 1995/96 season. The league was known as Division Four North before the 2008-09 season. Division One North, Two North and Three North are self-contained leagues within the larger Swalec leagues, and clubs can not be promoted to or demoted from the two leagues.