1989–90 Lancashire Cup

1989–90 Lancashire Cup
StructureRegional knockout championship
Teams17
WinnersWarrington
Runners-upOldham

The 1989–90 Lancashire Cup was the 77th occasion on which the Lancashire Cup competition had been held. Warrington won the trophy by beating Oldham by the score of 24-16 in the final. The match was played at Knowsley Road, Eccleston, St Helens, Merseyside, (historically in the county of Lancashire). The attendance was 9.990 and receipts were £41,804.