| All Ireland Champions | |
|---|---|
| Winners | Limerick (1st win) |
| All Ireland Runners-up | |
| Runners-up | Galway |
| Provincial Champions | |
| Munster | Limerick |
| Leinster | Wexford |
| Ulster | Derry |
| Connacht | Not Played |
|
← 1986
1988 →
|
|
The 1987 All-Ireland Under-21 Hurling Championship was the 24th staging of the All-Ireland Under-21 Hurling Championship since its establishment by the Gaelic Athletic Association in 1964.
Galway were the defending champions.
Limerick won the championship following a 2-15 to 3-6 defeat of Galway in the All-Ireland final. This was their first All-Ireland title in the under-21 grade.