The 1973 All-Ireland Under-21 Hurling Championship was the 10th staging of the All-Ireland Under-21 Hurling Championship since its establishment by the Gaelic Athletic Association in 1964. Galway were the defending champions, however, they were defeated by Cork in the All-Ireland semi-final. On 11 November 1973, Cork won the championship following a 2–10 to 4–2 defeat of Wexford in the All-Ireland final. This was their sixth All-Ireland title in the grade and their fifth in six championship seasons.

Munster Under-21 Hurling Championship

Munster quarter-finals

Munster semi-finals

Munster final

All-Ireland Under-21 Hurling Championship

All-Ireland semi-finals

All-Ireland final

Championship statistics

Miscellaneous