1990–91 Challenge Cup

1991 Silk Cut Challenge Cup
Duration6 Rounds
Winners Wigan
Runners-up St. Helens
Lance Todd Trophy Denis Betts

The 1991 Challenge Cup was the 90th staging of rugby league's oldest knockout competition, the Challenge Cup. Known as the Silk Cut Challenge Cup for sponsorship reasons, the final was contested by Wigan and St. Helens at Wembley. Wigan won the match 13–8.