St John Baptist Diocesan H School is located in West Islip, NY. It is a private school that serves 1718 students in grades 9-12. St John Baptist Diocesan H 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 John Baptist Diocesan H School had 17 students for every full-time equivalent teacher. The New York average is 13 students per full-time equivalent teacher.