Belfast City Council (; Ulster-Scots: Bilfawst Citie Cooncil) is the local authority with responsibility for part of the city of Belfast, the capital and largest city of Northern Ireland. The Council serves an estimated population of, the largest of any district council in Northern Ireland, while also being the fourth smallest by area. Belfast City Council is the primary council of the Belfast Metropolitan Area, a grouping of six district councils with commuter towns and overspill from Belfast, containing a total population of 579,276.
The Council is made up of 51 councillors, elected from nine district electoral areas across the City, most representing the more heavily populated north and west. It holds its meetings in the historic Belfast City Hall. The current Lord Mayor is Nichola Mallon of the Social Democratic and Labour Party (SDLP).
As part of the 2014/2015 reform of local government the city of Belfast will expand and the council will serve an area including 53,000 additional residents in 21,000 households. The number of councillors will increase from 51 to 60. Elections to the expanded city council took place on 22 May 2014.