The Basilica of Our Lady of Luján (español. Basílica de Nuestra Señora de Luján) is a Roman Catholic church building in Luján, Buenos Aires Province, Argentina.
Built in Neogothic style, it is dedicated to Our Lady of Luján, patron saint of Argentina.
Many people mistake this temple for a cathedral. Actually, it is part of the Roman Catholic Archdiocese of Mercedes-Luján, whose see is located at the Cathedral Basilica of Mercedes-Luján in the neighboring city of Mercedes.