Manchester (ˈmæntʃᵻstər,_-tʃɛs- ) is a city and metropolitan borough in the county of Greater Manchester, England. It had a population of 552,000 at the 2021 census. It is bordered by the Cheshire Plain to the south, the Pennines to the north and east, and the neighbouring city of Salford to the west. The two cities and the surrounding towns form one of the United Kingdom's most populous conurbations, the Greater Manchester Built-up Area, which has a population of 2.87 million. The city borders the boroughs of Trafford, Stockport, Tameside, Oldham, Rochdale, Bury, and Salford.
The history of Manchester began with the civilian settlement associated with the Roman fort (castra) of Mamucium or Mancunium, established in about AD 79 on a sandstone bluff near the confluence of the rivers Medlock and Irwell. Historically part of Lancashire, areas of Cheshire south of the River Mersey were incorporated into Manchester in the 20th century, including Wythenshawe in 1931. Throughout the Middle