Trinity Catholic High School, established on the proud traditions of Mercy, St. Thomas Aquinas, Rosary, and St. Thomas Aquinas-Mercy High Schools, is a co-educational college preparatory high school serving North St.Louis County and the surrounding areas. Its quality academic program is unmatched in value and recognizes the uniqueness and diversity of each student’s talent, intellect, style, and ability. Trinity Catholic learners are taught to think critically, live virtuously, and serve joyfully.