Glasgow is the most populous city in Scotland and the fourth-most populous city in the United Kingdom, as well as being the 27th largest city by population in Europe. In 2020, it had an estimated population of 635,640. Historically part of Lanarkshire, the city now forms the Glasgow City council area, one of the 32 council areas of Scotland, and is governed by Glasgow City Council. Glasgow is situated on the River Clyde in the country's West Central Lowlands. It is the fifth-most visited city in the United Kingdom.
Glasgow grew from a small rural settlement on the River Clyde to become the largest seaport in Scotland, and tenth largest by tonnage in Britain. Expanding from the medieval bishopric and royal burgh, and the later establishment of the University of Glasgow in the 15th century, it became a major centre of the Scottish Enlightenment in the 18th century. From the 18th century onwards, the city also grew as one of Britain's main hubs of transatlantic trade with North America and the West Indies.