Hills Adventist College

Hills Adventist College is a co-educational independent Seventh-day Adventist school with two campuses in the Sydney's Hills district: Castle Hill (ELC and Primary) and Kellyville (K-Y12). Hills Adventist College Castle Hill is an ELC and Primary co-educational Christian school in the Sydney Hills district. Hills Adventist College Kellyville is a welcoming K-Y12 co-educational Christian school in the Sydney Hills district. Enrolments at the College during 2023 totalled 795 students. The College is a part of the Seventh-day Adventist education system, the world's second largest Christian school system.

Spiritual aspects
All students are required to take part in Bible classes from Kindergarten to Year 10, and then Studies of Religion (SOR) a 2-unit NSW HSC course is mandatory in Year 11 and 12. The Bible classes cover topics in biblical history and Bible characters and themes and other Christian doctrines. Weekly, the entire student body gathers together for a chapel service. Outside the classrooms there is year-round spiritually oriented programming that relies on student involvement.

Sport
The College is part of the Independent Schools Association inter-school sports program and as such students have the opportunity to compete at local, regional, state and national levels depending on their abilities in sports of their choice and interest.