The 1998 Cork Junior A Hurling Championship was the 101st staging of the Cork Junior A Hurling Championship since its establishment by the Cork County Board. The championship ran from 27 September to 15 November 1998.
The final was played on 15 November 1998 at Páirc UàChaoimh in Cork, between Bride Rovers and Freemount, in what was their first ever meeting in the final. Bride Rovers won the match by 2-10 to 0-13 to claim their first ever championship title.
Ballinascarthy's Colman Murphy was the championship's top scorer with 0-23.