The 1944–45 Northern Rugby Football Union season was the sixth (and would be the last) season of the rugby league’s Wartime Emergency League necessitated by the Second World War.As in the previous (fifth) Wartime season, the clubs each played a different number of games, but this season clubs re-joined the league and there were now 17 of the original clubs taking part in the Competition (but still only Oldham, St Helens and Wigan from west of the Pennines). The League remained as one single amalgamated Championship.