Saint Malachy's Church is a Catholic church in Belfast, Northern Ireland. It is located in Alfred Street, a short distance from Belfast City Hall, although it precedes that building by over 60 years. The church is the focal point of the local parish community, also Saint Malachy's, one of the 88 parishes in the Diocese of Down and Connor. It is third oldest Catholic church in the city of Belfast.

The Diocese of Down and Connor, is a Latin Church ecclesiastical territory or diocese of the Catholic Church in Northern Ireland. It is one of eight suffragan dioceses in the ecclesiastical province of the metropolitan Archdiocese of Armagh. Bishop Alan McGuckian is Bishop.