The 2002–03 Harty Cup was the 83rd staging of the Harty Cup since its establishment in hurling by the Munster Council of Gaelic Athletic Association in 1918.

A new format was used with the introduction of a group stage.

[2] St Colman's College successfully defended its title[3][4] at the Harty Cup final replay on 30 March 2003 at Páirc Caoimhín Ó Luing in Feenagh, 2–13 to 0–08, against St Flannan's College, in what was their seventh meeting in the final and a first meeting in two years.

St Colman's College won their ninth successive Harty Cup title overall and a third consecutive title.

[5] St Colman's College's Andrew O'Shaughnessy was the top scorer with 12–15.