Great Valley High School is a comprehensive, college preparatory, public high school located in eastern Chester County.It is located in East Whiteland Township, near Malvern, Pennsylvania. Located on the same campus as Great Valley Middle School, it is the only high school within the Great Valley School District. The school serves students residing in the Great Valley School District in Grades 9-12 and enrolls about 1,150-1,175 students per year. The student to teacher ratio is approximately 14:1.