Wiltshire Council, known between 1889 and 2009 as Wiltshire County Council, is the local authority for the non-metropolitan county of Wiltshire in South West England, and has its headquarters at County Hall in Trowbridge. Since 2009 it has been a unitary authority, being a county council which also performs the functions of a district council. The non-metropolitan county is smaller than the ceremonial county, the latter additionally including Swindon.