| GAA Hurling Under-20 All-Ireland Championship | |
|---|---|
Current season or competition: 2024 All-Ireland Under-20 Hurling Championship | |
 | |
| Irish | Craobh Iomána Fé-20 na hÉireann |
| Code | Hurling |
| Founded | 1964 |
| Region | Ireland (GAA) |
| Trophy | James Nowlan Cup |
| No. of teams | 2 |
| Title holders |  Offaly (1st title) |
| Most titles |  Cork (14 titles) |
| Sponsors | oneills.com |
| TV partner(s) | TG4 |
| Official website | Official website |
The GAA Hurling Under-20 All-Ireland Championship (known for sponsorship reasons as the oneills.com GAA Hurling Under-20 All-Ireland Championship) is an annual inter-county hurling competition organised by the Gaelic Athletic Association (GAA). It is the highest inter-county hurling competition for male players between the ages of 17 and 20 in Ireland. The championship was contested as the All-Ireland Under-21 Championship between 1964 and 2018 before changing to an under-20 age category from 2019.
The final, currently held on the first Sunday in June, serves as the culmination of a series of games played during the summer months, and the results determine which team receives the James Nowlan Cup. The All-Ireland Championship had always been played on a straight knockout basis whereby once a team loses they are eliminated from the championship, however, as of 2018 the qualification procedures for the championship have changed. Currently, qualification is limited to teams competing in the Leinster Championship and the Munster Championship.
Two teams currently participate in the All-Ireland Championship, the Munster Champions and the Leinster Champions, with the most successful teams coming from the province of Munster. Teams representing this province have won a total of 32 All-Ireland titles.
The title has been won by 9 different teams, 7 of whom have won the title more than once. The all-time record-holders are Cork, who have won the championship on 13 occasions. Offaly are the current holders.