The 1977–78 National Hurling League was the 47th season of the National Hurling League.
Westmeath entered Division 1 as the promoted team.
On 30 April 1978, Clare won the title after a 3-10 to 1-10 win over Kilkenny in the final.
[1] Westmeath were relegated from Division 1 after just one season in the top flight.
Quarter-finals Semi-finals Final On 6 August 1978, Carlow won the title after a 1-15 to 1-7 win over Kerry in the final.