St Catherine's School (commonly referred to as St Cath's) is a private Anglican Junior and Senior day and boarding school, located in Waverley, an eastern suburb of Sydney, New South Wales, Australia. Established in 1856 as a school for the daughters of clergy, St Catherine's is the oldest Anglican girls' school in Australia. It is also the oldest private girls' school in Australia. It is a non-selective school, and currently caters for approximately 1,000 girls from Year K to Year 12, including 70 boarders. St Catherine's has been reviewed by the Good Schools Guide International.