The 1977 All-Ireland Under-21 Hurling Championship was the 14th staging of the All-Ireland Under-21 Hurling Championship since its establishment by the Gaelic Athletic Association in 1964.
Cork were the defending champions.
On 9 October 1977, Kilkenny won the championship following a 2-9 to 1-9 defeat of Cork in the All-Ireland final.[1] This was their third All-Ireland title in the under-21 grade and their first in two championship seasons.
Final
First round
Semi-finals
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