Glasgow (, also UK: , US: ; Scots: Glesga [ˈɡlezɡə]; Scottish Gaelic: Glaschu [ˈkl̪ˠas̪əxu]) is the most populous city in Scotland, and the third most populous city in the United Kingdom, as of the 2017 estimated city population of 621,020. Historically part of Lanarkshire, the city now forms the Glasgow City council area, one of the 32 council areas of Scotland; the local authority is Glasgow City Council.