Hilltop Country Day School is a private, nonsectarian coeducational day school located in Sparta, in Sussex County, New Jersey, United States. The school serves students in preschool through eighth grade. The school is divided into an Early Childhood Division (Preschool and Pre Kindergarten), a Lower school (Kindergarten through 4th grade) and Upper School (5th through 8th grade). The teaching philosophy is centered on small class sizes that allow individual attention and a flexible curriculum that can be adapted to individual needs.