The 1986 All-Ireland Under-21 Hurling Championship was the 23rd staging of the All-Ireland Under-21 Hurling Championship since its establishment by the Gaelic Athletic Association in 1964.

Tipperary were the defending champions, however, they were beaten by Limerick in the Munster semi-final.

On 14 September 1986, Galway won the championship following a 0–14 to 2–5 defeat of Wexford in the All-Ireland final. This was their fourth All-Ireland title in the under-21 grade and their first in three championship seasons.

Leinster Under-21 Hurling Championship Leinster quarter-finals

Leinster semi-finals

Leinster final

Leinster final replay

Munster Under-21 Hurling Championship Munster quarter-finals

Munster semi-finals

Munster final

Munster final replay

Ulster Under-21 Hurling Championship Ulster final

Ulster final replay

All-Ireland Under-21 Hurling Championship All-Ireland semi-finals

All-Ireland final

Championship statistics

Miscellaneous

Derry won the Ulster Championship for the first time in their history. Limerick won the Munster Championship for the first time in their history. The All-Ireland semi-final clash between Derry and Galway remains their only ever championship meeting.

References