| Connacht Under-21 Hurling Championship | |
|---|---|
| Founded | 1964 |
| Title holders |  Galway (8th title) |
| Most titles | Galway (8 titles) |
For the Senior equivalent see: Connacht Senior Hurling Championship
The Connacht U-21 Hurling Championship is an U-21 hurling tournament. The winners of the Connacht championship go on to qualify for the All-Ireland Under-21 Hurling Championship. The last winners of the Connacht championship was Galway in 2005, there was no competition in 2006 and 2007 therefore Galway went straight to the semi-finals of the All-Ireland Under-21 Hurling Championship without playing a game. Galway are the only team to win the Connacht championship and it has only been played on 8 occasions due to a lack of a competitive side to compete with in Connacht.
The competition was resurrected in 2010 as part of the All-Ireland B Under-21 Hurling Championship. The final was won by Roscommon who defeated Mayo 3–10 to 0–10.
Top winners
| Team | Wins | Years won | |
|---|---|---|---|
| 1 | Galway |
8 | 1972, 1978, 1983, 1986, 1991, 1993, 1996, 2005 |
| 2 |  Roscommon |
3 | 1964, 1965, 1966 |