The first seminary founded by the society is the St. Pius X International Seminary located in Écône, Switzerland. Its largest is located in the United States: St. Thomas Aquinas Seminary, Dillwyn, VA, and having outgrown its previous facilities, relocated in 2016 from Winona, Minnesota; the former seminary complex continues to house the novitiate of the religious brothers. Other seminaries are located in France ( Seminary, Flavigny-sur-Ozerain), Germany (Sacred Heart of Jesus Seminary, Zaitzkofen), and Argentina (, La Reja). The society also runs pre-seminaries for prospective priestly vocations in Italy (Albano Laziale), Brazil (Santa Maria), and the Philippines (Santa Barbara, Iloilo).
