St. Andrew's is a private, Episcopal, co-educational boarding school in Middletown, Delaware. Enrollment for the 2018–2019 school year was 311 students in grades nine to twelve, referred to using the Forms nomenclature as Forms III (freshmen) through VI (seniors) within the school. Apart from students who are children of faculty living on or near campus, all students are required to board, living in dorms on campus separated by sex and Form. Sixth formers live in underformer dorms, and act as residential leaders in charge of dorm life alongside faculty dorm parents.