1989–90 Lancashire Cup
| 1989–90 Lancashire Cup | |
|---|---|
| Structure | Regional knockout championship |
| Teams | 17 |
| Winners | Warrington |
| Runners-up | Oldham |
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.