All first years at Saint Marys live on campus. 55% of the total student population lives on campus. There are six first year residence halls (Augustine, Justin, Mitty, De La Salle, Aquinas and Assumption Halls). All first year residence halls (with the exception of Aquinas) are set up "community style," in which two or three students usually share a room and the entire floor shares a central bathroom. Floors are usually separated by sex in first year halls (because of the shared bathrooms). The only exceptions are Aquinas hall which has students live in suites with their own bathroom, and the first floor of Assumption, which is coeducational with separate bathrooms for each sex. Currently, first years living on campus are guaranteed a spot on campus for their second year. Sophomores live in Becket Hall, More Hall, North and South Claeys Halls, and Ageno A, B, and C Halls. All of these halls are "suite" style living and each suite comes with three or four bedrooms, accommodates six students, and has its own bathroom and shower. Floors on suite buildings are co-ed.