1956–57 was the forty-fourth occasion on which the Lancashire Cup completion had been held. Oldham won the trophy by beating St. Helens by the score of 10-3
The match was played at Central Park, Wigan, (historically in the county of Lancashire). The excellent attendance was 39,544 and receipts were £6,274
This was the first of Oldham's three consecutive triumphs. 1958 would be the last time they would win the trophy, although they did later appear 4 times as runners-up (in 1966, 1969, 1987 and 1989
Background
With the invitation to junior club “County Amateurs”, the number of clubs remained the same at 15.
The same pre-war fixture format was retained, and due to the number of clubs this resulted in one bye in the first round.
1 * County Amateurs were a Junior (amateur) club from ??
2 * Central Park was the home ground of Wigan with a final capacity of 18,000, although the record attendance was 47,747 for Wigan v St Helens 27 March 1959