John Therry Catholic College is a systemic Roman Catholic co-educational secondary day school, located in Rosemeadow, Campbelltown, New South Wales, Australia, established in the tradition of the Marist Brothers. Karen Young was appointed principal in 2008.In 2018 Wayne Marshall was appointed Principal and the college has gone from strength to strength. 2021 saw the Colleges best ever HSC results and the school was ranked 195th in the state – a rise of 260 places over two years.

John Therry Catholic High School opened on 9 February 1981, enrolling 300 students for Years 7 to 9. The principal at opening was Brother Clarence Cunningham, until 1986, when he moved to Mount Carmel High School.

International triathlete Natalie Van Coevorden attended the school around the early 2000s.

• List of Catholic schools in New South Wales
• Catholic education in Australia

• John Therry Catholic High School Website