The Mary Wallopers are an Irish folk group hailing from Dundalk, County Louth, known for their raw, humorous, and energetic approach to traditional Irish music. The band brings a modern twist to old ballads, often infused with working-class themes and social commentary. Their performances are marked by a lively and communal spirit, blending storytelling with music that resonates with both older folk traditions and contemporary audiences.

The group is led by brothers Charles and Andrew Hendy, with Seán McKenna, and often features additional musicians in live performances. Their music draws heavily from the Irish folk tradition, combining elements of rebellion, humour, and political awareness. Songs like "Cod Liver Oil and the Orange Juice" and "Build Me Up Buttercup" showcase their playful yet skilful reinterpretation of classics.

They are known for their vibrant, pub-like atmosphere during live performances, which feel like intimate gatherings with plenty of audience interaction. Their debut self-titled album, released in 2022, solidified their reputation as a leading act in the contemporary Irish folk revival.