1973 All-Ireland Under-21 Hurling Championship

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.

Miscellaneous

 * The All-Ireland semi-final between Wexford and Antrim was abandoned by the referee ten minutes from the end when a fracas broke out. An official from the Antrim County Board also refused to cooperate with journalists after claiming that his team were afforded a poor reception at Wexford Park.
 * The All-Ireland semi-final between Cork and Galway was postponed twice before eventually being played on 28 October 1971.