The Archdiocesan Shrine of Our Lady of the Assumption, commonly known as the Santa Maria Church and Santa Maria Pro-cathedral, is a Roman Catholic shrine in Santa Maria, Ilocos Sur, Philippines. The church was designated as a UNESCO World Heritage Site on December 11, 1993, as part of the Baroque Churches of the Philippines, a collection of four Baroque Spanish-era churches. It is currently the pro-cathedral of the Archdiocese of Nueva Segovia while the Vigan Cathedral is undergoing repairs.

Santa Maria, officially the Municipality of Santa Maria, is a 3rd class municipality in the province of Ilocos Sur, Philippines. According to the 2020 census, it has a population of 30,006 people.