The 2015 Westmeath Senior Hurling Championship was the 111th staging of the Westmeath Senior Hurling Championship since its establishment by the Westmeath County Board in 1903.

The championship began on 18 April 2015 and ended on 18 October 2015.

[1] St. Brigid's entered as a promoted team from the intermediate championship.

On 18 October 2015, Clonkill won the championship following a 1–14 to 1–10 defeat of Raharney in the final.

[2] St Oliver Plunkett's GAA were relegated from the championship, following a 2–11 to 2–10 defeat by Delvin.