Dundee (; ), officially the City of Dundee, is Scotland's fourth largest city and the 51st most populous built-up area in the United Kingdom. At the 2011 census, Dundee had a population density of 8,541.8/sq mi (3,298.0/km2), the second highest of any Scottish city. The mid-year population estimate for 2014 is 148,260. It lies within the eastern central Lowlands on the north bank of the Firth of Tay, which feeds into the North Sea. Under the name of Dundee City, it forms one of the 32 council areas used for local government in Scotland.