The River Thames flows through southern England

England

England is a country that is part of the United Kingdom. It shares land borders with Scotland to the north and Wales to the west; the Irish Sea is to the north west, the Celtic Sea to the south west, with the North Sea to the east and the English Channel to the south separating it from continental...

. It is the longest river entirely in England and the second longest in the United Kingdom

United Kingdom

The United Kingdom of Great Britain and Northern IrelandIn the United Kingdom and Dependencies, other languages have been officially recognised as legitimate autochthonous languages under the European Charter for Regional or Minority Languages...

. While it is best known because its lower reaches flow through central London

Central London

Central London is the innermost part of London, England. There is no official or commonly accepted definition of its area, but its characteristics are understood to include a high density built environment, high land values, an elevated daytime population and a concentration of regionally,...

, the river flows alongside several other towns and cities, including Oxford

Oxford

The city of Oxford is the county town of Oxfordshire, England. The city, made prominent by its medieval university, has a population of just under 165,000, with 153,900 living within the district boundary. It lies about 50 miles north-west of London. The rivers Cherwell and Thames run through...

, Reading

Reading, Berkshire

Reading is a large town and unitary authority area in England. It is located in the Thames Valley at the confluence of the River Thames and River Kennet, and on both the Great Western Main Line railway and the M4 motorway, some west of London....

, Henley-on-Thames

Henley-on-Thames

Henley-on-Thames is a town and civil parish on the River Thames in South Oxfordshire, England, about 10 miles downstream and north-east from Reading, 10 miles upstream and west from Maidenhead...

, Windsor

Windsor, Berkshire

Windsor is an affluent suburban town and unparished area in the Royal Borough of Windsor and Maidenhead in Berkshire, England. It is widely known as the site of Windsor Castle, one of the official residences of the British Royal Family....

, Kingston upon Thames

Kingston upon Thames

Kingston upon Thames is the principal settlement of the Royal Borough of Kingston upon Thames in southwest London. It was the ancient market town where Saxon kings were crowned and is now a suburb situated south west of Charing Cross. It is one of the major metropolitan centres identified in the...

 and Richmond.

The river gives its name to several geographical and political entities including the Thames Valley

Thames Valley

The Thames Valley Region is a loose term for the English counties and towns roughly following the course of the River Thames as it flows from Oxfordshire in the west to London in the east. It includes parts of Buckinghamshire, Berkshire, North Hampshire, Surrey and west London...

, a region of England centred around the river between Oxford and west London, the Thames Gateway

Thames Gateway

The Thames Gateway is an area of land stretching east from inner east London on both sides of the River Thames and the Thames Estuary. The area, which includes much brownfield land, has been designated a national priority for urban regeneration, taking advantage of the development opportunities...

, the area centred around the tidal Thames, and the Thames Estuary

Thames Estuary

The Thames Mouth is the estuary in which the River Thames meets the waters of the North Sea.It is not easy to define the limits of the estuary, although physically the head of Sea Reach, near Canvey Island on the Essex shore is probably the western boundary...

 to the east of London.