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 second oldest Catholic church in the city of Belfast continuously in use. St Mary's is the oldest: both St Mary's Church, Belfast and St Patrick's Church, Belfast having been substantially or totally rebuilt.