St Patrick's Seminary, Manly is a heritage-listed former residence of the Archbishop of Sydney and Roman Catholic Church seminary at 151 Darley Road, Manly, Northern Beaches Council, New South Wales, Australia. The property was also known as St Patrick's Estate, St. Patricks Estate, St. Patrick's Seminary or College, Cardinal's Palace, Archbishop's Residence, St Pats, St Patricks and Saint Paul's Catholic College. It was designed by Sheerin & Hennessy, Hennessy & Hennessy, Scott Green & Scott and Sydney G Hirst & Kennedy and built from 1885 to 1889 by William Farley (Residence/Palace), W. H. Jennings (College/Seminary). The property is owned by the Catholic Archdiocese of Sydney. The property was added to the New South Wales State Heritage Register on 21 January 2011.

The seminary operated from 1889 until its relocation in 1995 to Strathfield where the teaching institute has become distinct from the seminary. The Catholic Institute of Sydney is now the ecclesiastical theology faculty. The Seminary of the Good Shepherd is the house of formation. Since 1996, the property has been home to the International College of Management, Sydney (ICMS). The estate also houses a high school, residential housing, the old convent, and a children's hospice.