There are 48 Grade I listed buildings in Greater Manchester, England. In the United Kingdom, the term listed building refers to a building or other structure officially designated as being of special architectural, historical or cultural significance; Grade I structures are those considered to be "buildings of exceptional interest". In England, the authority for listing under the Planning Act 1990 rests with Historic England, a non-departmental public body sponsored by the Department for Culture, Media and Sport.

The Metropolitan Borough of Oldham is a metropolitan borough of Greater Manchester in England. It is named after its largest town, Oldham. The borough had a population of 243,912 in 2022, making it the sixth-largest district by population in Greater Manchester. The borough spans 142 square kilometres (55 sq mi).