(Not to be confused with Castle High School.) Castle Hill High School, located in Castle Street, Castle Hill, New South Wales, Australia, is a co-educational and comprehensive school with students ranging from year 7 to year 12. Castle Hill High School has performed well during the 2011 HSC, students achieving 111 Band 6's as well as having 6 students that have received an all-rounders award. According to Better Education HSC rankings regarding Mathematics and English marks Castle Hill High School is ranked 145th in New South Wales.