The 2018–19 WRU Championship was the seventh season of the WRU Championship, the second tier of club rugby in Wales run by the Welsh Rugby Union.

Provided that the champion club holds an 'A-License', they will play-off against the 12th placed team in the 2018-19 Principality Premiership at a neutral venue to determine the 12th team for the 2019–20 season.

The bottom four clubs at the end of the season will be relegated to Division 1 (based on geographical location).

[1] At the end of last season, Skewen and Glynneath were both relegated to Division 1 West Central.

The winners of each Division 1 entered into playoffs to decide the remaining two places.