The Mary Wallopers are an Irish folk music group based in Dundalk, County Louth, originally consisting of brothers Charles and Andrew Hendy, and Seán McKenna. In 2022 the group expanded to include Róisín Barrett on bass, Brendan McInerney on drums, Seamas Hyland on accordion, and Finnian O'Connor on tin whistle and uilleann pipes. In late 2023, Hyland left to concentrate on his own music. McInerney had previously been replaced by Ken Mooney of The Urges. In March 2025, founding member Seán McKenna announced his departure to pursue his own music.