Belfast City Council is the local authority with responsibility for part of Belfast, the largest city of Northern Ireland. The council serves an estimated population of 348,005 (mid-2022 est.), the largest of any district council in Northern Ireland, while being the smallest by area. Belfast City Council is the primary council of the Belfast Metropolitan Area, a grouping of six former district councils with commuter towns and overspill from Belfast, containing a total population of 579,276.

The Ulster Unionist Party (UUP) is a unionist political party in Northern Ireland. The party was founded as the Ulster Unionist Council in 1905, emerging from the Irish Unionist Alliance in Ulster. Under Edward Carson, it led unionist opposition to the Irish Home Rule movement. Following the partition of Ireland, it was the governing party of Northern Ireland between 1921 and 1972. It was supported by most unionist voters throughout the conflict known as the Troubles, during which time it was often referred to as the Official Unionist Party (OUP).