Trinity Catholic College is a dual-campus independent Roman Catholic co-educational secondary day school, located in the inner western suburbs of Auburn and Regents Park, in Sydney, New South Wales, Australia. Students in Years 7 and 8 are located at the Regents Park campus, and students from Years 9 to 12 are located at the Auburn campus. The College follows the religious tradition of the Marist Brothers, founded in 1817 by French priest and saint Marcellin Champagnat.