The 1977 Croke Cup was the 26th staging of the Croke Cup since its establishment by the Gaelic Athletic Association in 1944. The competition ran from 3 April to 1 May 1977.
St Flannan's College were the defending champions, however, they were beaten by St Colman's College in the Harty Cup final.
The final was played on 1 May 1977 at Semple Stadium in Thurles, between St Colman's College and St Kieran's College, in what was their first ever meeting in the final. St Colman's College won the match by 2–13 to 1–09 to claim their first ever Croke Cup title.
John Mangan was the top scorer with 2-02.