Sparta High School is a four-year comprehensive community public high school serving students in ninth through twelfth grades from Sparta, in Sussex County, New Jersey, United States, operating as the lone secondary school of the Sparta Township Public School District. As of the 2020–21 school year, the school had an enrollment of 1,057 students and 97.7 classroom teachers (on an FTE basis), for a student–teacher ratio of 10.8:1. There were 27 students (2.6% of enrollment) eligible for free lunch and 13 (1.2% of students) eligible for reduced-cost lunch.