St Paul's Catholic College (formerly named Christian Brothers College, Manly) is a diocesan Catholic secondary day school for boys, located in , on the Northern Beaches of Sydney, New South Wales, Australia. The college was founded by the Congregation of Christian Brothers in 1929, and since 1982 has been conducted by lay staff appointed by the Diocese of Broken Bay.
As a regional secondary school, St Paul's provides for the boys of the Catholic parishes of Manly Freshwater (including Curl Curl, Fairlight, Freshwater, Manly), North Harbour (including Allambie, Balgowlah, Clontarf, Manly Vale, Seaforth), and Warringah (including Beacon Hill, Brookvale, Cromer, Dee Why, and Narraweena).
The shield of the college displays the Cross of Christ, the proudly-borne standard of the loyal and resilient disciple of Jesus. The Celtic form of the Cross hearkens back to the foundation of the college by the Christian Brothers, who were themselves founded by an Irishman, Edmund Ignatius Rice. The star stands for the Blessed Virgin Mary, specially invoked locally under her title "Star of the Sea" in honour of the unfailing guidance and direction she gives to travellers and pilgrims. The colours are also deeply symbolic: in heraldry, red is often associated with zeal and courage, and black with luxuriance - together, the colours speak of the hope of every member of the college for personal success, which comes through hard striving in all circumstances. The shield is laid on an open scroll which bears the name of the college patron, St Paul the Apostle, and the motto, Prima Primum (First things first).
The Latin motto of the college, Prima Primum (First things first), is a challenge to students to order wisely life's competing priorities. To live well, a St Paul's boy will not allow himself to be swamped by the many and varied claims on his time and talents, but will instead be inspired to search among them for the one thing which is necessary and reorder all else under and around it. Once having found God, the St Paul's boy will see clearly what comes next, and what can next be taken up without losing the greater, more important.
The college has a long tradition of cultural engagement and sporting achievement, which it sustains by a high degree of student participation.