Southampton is a port city in Hampshire, England. It is located approximately 80 mi south-west of London, 20 mi west of Portsmouth, and 20 mi south-east of Salisbury. Southampton had a population of 253,651 at the 2011 census, making it one of the most populous and largest 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. A major port, and close to the New Forest, Southampton lies at the northernmost point of Southampton Water, at the confluence of the River Test and Itchen, with the River Hamble joining to the south. Southampton is classified as a Medium-Port City.