| Championship Details | |
|---|---|
| Dates | 19 April 1970 - 1 November 1970 |
| All Ireland Champions | |
| Winners | Cork (4th win) |
| Captain | Teddy O'Brien |
| All Ireland Runners-up | |
| Runners-up | Wexford |
| Captain | Liam Bennett |
| Provincial Champions | |
| Munster | Cork |
| Leinster | Wexford |
| Ulster | Antrim |
| Connacht | Galway |
|
← 1969
1971 →
|
|
The 1970 All-Ireland Under-21 Hurling Championship was the 7th staging of the All-Ireland Under-21 Hurling Championship since its establishment by the Gaelic Athletic Association in 1964.
Cork entered the championship as the defending champions.
On 1 November 1970, Cork won the championship following a 5-17 to 0-8 defeat of Wexford in a replay of the All-Ireland final. This was their 4th All-Ireland title in the grade and their third in succession.
In keeping with their senior and minor teams, Galway's under-21 hurlers left the Munster championship where they had been playing since the 1964 championship. Having no competition in their own province, Galway would now receive a bye to the All-Ireland semi-final stage.
Semi-finals
Finals