Greater Manchester is a metropolitan county in North West England. It was created by the Local Government Act 1972, and consists of the metropolitan boroughs of Bolton, Bury, Oldham, Rochdale, Stockport, Tameside, Trafford, Wigan and the cities of Manchester and Salford. This is a complete list of the Grade I listed churches in the metropolitan county as recorded in the National Heritage List for England. Buildings are listed by the Secretary of State for Culture, Media and Sport on the recommendation of English Heritage. 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.

St Leonard's is a Church of England parish church in Middleton, Greater Manchester, England. It is recorded in the National Heritage List for England as a Grade I listed building.