The Leinster GAA Hurling Senior Championship, known simply as the Leinster Championship, is an annual inter-county hurling competition organised by the Leinster Council of the Gaelic Athletic Association (GAA). It is the highest inter-county hurling competition in the province of Leinster, and has been contested every year since the 1888 championship.

Hurling is an outdoor team game of ancient Gaelic Irish origin, played by men. One of Ireland's native Gaelic games, it shares a number of features with Gaelic football, such as the field and goals, the number of players and much terminology. The same game played by women is called camogie, which shares a common Gaelic root.