The Seminary of St. Pius X (Latin: Seminarium Sancti Pii Decimi), or St. Pius X Seminary (SPXS), is a Filipino Roman Catholic secondary school and seminary in the Lawaan hills, Roxas City, Capiz, in the Philippines, run by the Catholic priests of the Archdiocese of Capiz. The seminary and its surrounding areas comprise some three hectares of rocky hills. Cardinal Jaime Sin was the first rector of the school. In 1999, the college (Philosophy and Theology) of St. Pius X Seminary transferred to Cagay, Roxas City, Capiz, and named the school Sancta Maria, Mater et Regina, Seminarium (SMMRS) to honor the Blessed Virgin Mary. SPXS decided to retain and maintain its high school and pre-college until 2012, pre-college was transferred to SMMRS.
The erection of the Diocese of Capiz on 28 May 1951 brought a need to train priests. But the meager financial resources of the young diocese made the proposed project a difficult one, considering that