St John the Baptist Cathedral, Sligo or more properly the Cathedral of St Mary the Virgin and St John the Baptist, Sligo but also known as Sligo Cathedral is one of two cathedral churches in the diocese of Kilmore, Elphin and Ardagh (the other is St Fethlimidh's Cathedral, Kilmore) in the Church of Ireland. It is situated in the town of Sligo, Ireland in the ecclesiastical province of Armagh.

The church was built as St John's Church in the mid-18th century to the design of architect Richard Cassels, who adopted a basilica pattern from Roman architecture.

• Dean of Elphin and Ardagh
• List of cathedrals in Ireland

• Sligo Cathedral Group (Church of Ireland)
• Cathedral of Saint Mary the Virgin and Saint John the Baptist on the National Inventory of Architectural Heritage website
• "Cathedral of Saint Mary the Virgin and Saint John the Baptist", entry on Archiseek

• "History of St John's". Retrieved 19 September 2012.