The 1989–90 Harty Cup was the 70th staging of the Harty Cup since its establishment by the Munster Council of Gaelic Athletic Association in 1918. The competition ran from 11 October 1989 to 25 March 1990.
St Flannan's College entered the competition as the defending champions.
The final was played on 25 March 1990 at the Gaelic Grounds in Limerick, between St Flannan's College and Nenagh CBS, in what remains their only meeting in the final. St Flannan's College won the match by 0–10 to 0–03 to claim their 15th Harty Cup title overall and a second successive title.
North Monastery's Conor O'Riordan was the top scorer with 2-22.
Results First round
Quarter-finals
Semi-finals
Final
Statistics Top scorers
Rank Player County Tally Total Matches Average1Conor O'RiordanNorth Monastery2-222847.002Jamesie O'ConnorSt Flannan's College0-272755.403John DoughanNenagh CBS3-172655.204Michael GleesonAbbey CBS1-161936.335Barry EganNorth Monastery2-111744.25
References