The 1977 Yorkshire Cup was the seventieth occasion on which the Yorkshire Cup competition had been held. This year, for the first time for eighteen years (and the last time in the history of the Yorkshire Cup), a new name appeared on the trophy, with Castleford winning it by beating Featherstone Rovers in the final by the score of 17-7. The match was played at Headingley, Leeds, now in West Yorkshire. The attendance was 6,318 and receipts were £4,528. It as also Featherstone Rovers's second consecutive Yorkshire Cup final appearances, both of which resulted in a defeat.