Southampton is a port city in Hampshire, England. It is located approximately 80 miles south-west of London, 20 miles west of Portsmouth, and 20 miles south-east of Salisbury. Southampton had a population of 253,651 at the 2011 census, making it one of the most populous cities in southern England. Southampton forms part of the larger South Hampshire conurbation which includes the city of Portsmouth and the boroughs of Havant, Eastleigh, Fareham, and Gosport.