Xavier College is a Roman Catholic, day and boarding school predominantly for boys, founded in 1872 by the Society of Jesus, with its main campus located in Kew, an eastern suburb of Melbourne, Victoria, Australia. Classes started in 1878.

The college is part of the international network of Jesuit schools begun in Messina, Sicily in 1548. Originally an all-boys school, the College now offers co-education until Year 4, and an all-boys environment from then on. In 2011, the school had 2,085 students on roll, including 76 boarders.

The school is in the Archdiocese of Melbourne, and is affiliated with the Independent Primary School Heads of Australia (IPSHA) formerly the Junior School Heads Association of Australia (JSHAA), the Association of Heads of Independent Schools of Australia (AHISA), the Australian Boarding Schools' Association (ABSA), and the Associated Public Schools of Victoria (APS).

In December 2010, The Age reported that, on the number of alumni who had received a top Order of Australia honour, Xavier College ranked equal tenth among Australian schools.

Grant Thomas described the school as "the best-connected school in Melbourne". Its notable alumni include one archbishop, two state governors, one deputy prime minister, one state premier, three deputy premiers, one High Court justice and numerous Supreme Court justices.