The 1991 Railway Cup Hurling Championship was the 64th staging of the Railway Cup, the Gaelic Athletic Association's premier inter-provincial hurling tournament. The championship began on 10 March 1991 and ended on 7 April 1991.
Connacht were the defending champions.
On 7 April 1991, Connacht won the cup following a 1-13 to 0-12 defeat of Munster in the final. This was their 8th Railway Cup title and their second in succession after winning the last cup title in 1989.
Semi-finals
Final