The 1990 Croke Cup was the 39th staging of the Croke Cup since its establishment by the Gaelic Athletic Association in 1944. The competition ran from 15 April to 6 May 1990.
St Kieran's College were the defending champions.
The final was played on 6 May 1990 at the Mitchelstown Grounds, between St Kieran's College and St Flannan's College, in what was their sixth meeting in the final overall and a second consecutive meeting. St Kieran's College won the match by 2âÂÂ10 to 0âÂÂ07 to claim a record-equalling 10th Croke Cup title overall and a third title in succession.
Andy Comerford was the top scorer with 1-08.