New Castle Junior/Senior High School is a public school located in New Castle, Pennsylvania in Lawrence County. It is part of the New Castle Area School District which serves New Castle, South New Castle, and Taylor Township. The school is a combined junior high school and (senior) high school, educating students in 7th through 12th grades. Its total student population is between 1,300 and 1,500. It has a student-to-teacher ratio of 14 to 1.