Wiltshire Police, formerly known as Wiltshire Constabulary, is the territorial police force responsible for policing the county of Wiltshire (including the Borough of Swindon) in South West England. The force serves 722,000 people over an area of 1,346 square miles (3,490 km2).In terms of officer numbers, it is the second smallest force in the United Kingdom (after the City of London Police).