Islamic schools are the fastest growing school sector in the state, with some expanding so quickly they have had to freeze waiting lists or consider limiting new enrolments to siblings.

The number of Islamic schools in NSW has tripled over the past 15 years to 22. And, while the number of students in the state's public schools dropped slightly over the past decade, the student population of Islamic schools has doubled to more than 10,000.

Students from Al-Faisal College in Auburn: (From Left) Ghazia Bahran,Alyssa Alameddine,Israa Kanj and Emina Preljevic. Credit:Brendan Esposito

Al-Faisal College at Auburn has almost doubled in size over the past five years to 1600 students.

Last week, it bought a four-hectare property at Austral in Sydney's west where it plans to build a campus for a further 600 students. It may soon be the biggest independent school in the state.