St Mark's High School is located in Wilmington, DE. It is a private school that serves 1357 students in grades 9-12. St Mark's High School is coed (school has male and female students) and is Roman Catholic in orientation. The school belongs to the National Catholic Educational Association.
In 2010, St Mark's High School had 12 students for every full-time equivalent teacher. The Delaware average is 14 students per full-time equivalent teacher.