Merseyside is a metropolitan county in North West England. It was created by the Local Government Act 1972, and consists of the metropolitan boroughs of Knowsley, St Helens, Sefton, Wirral, and the city of Liverpool. Buildings are listed on the recommendation of English Heritage to the Secretary of State for Culture, Media and Sport, who makes the decision whether or not to list the structure. Grade I listed buildings are defined as being of "exceptional interest, sometimes considered to be internationally important"; only 2.5 per cent of listed buildings are included in this grade. This is a complete list of Grade I listed churches in the metropolitan county of Merseyside as recorded in the National Heritage List for England.

Liverpool Cathedral is a Church of England cathedral in the city of Liverpool, England. It is the seat of the bishop of Liverpool and is the mother church of the diocese of Liverpool. The church may be formally referred to as the Cathedral Church of Christ in Liverpool the Cathedral Church of the Risen Christ, Liverpool. It is the largest cathedral and religious building in Britain, and the eighth largest church in the world.