Dorchester on Thames

Dorchester on Thames
Dorchester-on-Thames with the Abbey tower in the background (July 2009)
Dorchester on Thames Location within Oxfordshire
Area	4.18 km2 (1.61 sq mi)
Population	992 (2001 census)[1]
• Density	237/km2 (610/sq mi)
OS grid reference	SU5794
Civil parish	Dorchester
District	South Oxfordshire
Shire county	Oxfordshire
Region	South East
Country	England
Sovereign state	United Kingdom
Post town	Wallingford
Postcode district	OX10
Dialling code	01865
Police	Thames Valley
Fire	Oxfordshire
Ambulance	South Central
UK Parliament	Henley
Website	Dorchester on Thames
List of places UK England Oxfordshire 51°38′38″N 1°09′58″W / 51.644°N 1.166°W / 51.644; -1.166

Dorchester on Thames (or Dorchester-on-Thames) is a village and civil parish in Oxfordshire, about 3 miles (5 km) northwest of Wallingford and 8 miles (13 km) southeast of Oxford. The town is a few hundred yards from the confluence of the River Thames and River Thame. A common practice of the scholars at Oxford was to refer to the river Thames by two separate names, with Dorchester on Thames the point of change. Downstream of the village, the river continued to be named The Thames, while upstream it was named The Isis. Ordnance Survey maps continued the practice by labelling the river as "River Thames or Isis" above Dorchester, however, this distinction is rarely made outside the city of Oxford.