Justin-siena is located in Napa, CA. It is a private school that serves 605 students in grades 9-12. Justin-siena is coed (school has male and female students) and is Roman Catholic in orientation. The school belongs to the Other school association(s).
In 2010, Justin-siena had 14 students for every full-time equivalent teacher. The California average is 24 students per full-time equivalent teacher.