The Minor Basilica of San Sebastian (Filipino: Basilika Menor ng San Sebastian; Spanish: Basílica Menor de San Sebastián), better known as San Sebastian Church (Filipino: Simbahan ng San Sebastian) or San Sebastian Basilica is a minor basilica of the Roman Catholic Church in Manila, Philippines. It is the church of the Parish of San Sebastian, and also a Shrine of Nuestra Senora del Monte Carmelo, or Our Lady of Mount Carmel.

Completed in 1891, San Sebastian Church is noted for its architecture. An example of the Gothic Revival architecture in the Philippines, it is the only steel building church in the Philippines. It was designated as a National Historical Landmark in 1973 and as a National Cultural Treasure in 2011.San Sebastian Church is under the care of the Order of Augustinian Recollects, who also operate the San Sebastian College-Recoletos adjacent to the basilica. It is located at Plaza del Carmen, at the eastern end of Recto Avenue, in Quiapo, Manila.