The 1937–38 Lancashire Cup was the thirtieth occasion on which the Lancashire Cup competition had been held. Warrington won the trophy by beating Barrow by 8–4.
The match was played at Central Park, Wigan, (historically in the county of Lancashire). The attendance was 14,000 and receipts were £800.
Background
The number of teams entering this year's competition decreased by one with the withdrawal of Streatham & Mitcham, back to the previous total of 13 but the same fixture format was retained.
There was once again a bye in the first round, and there was still a "blank" or "dummy" fixture. The bye in the second round remained.
1 * 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