East Stour is a village and civil parish in the ceremonial county of Dorset in southern England. It lies within the Dorset administrative district, about two miles south of the town of Gillingham. The village is 1⁄2 mile from the east bank of the River Stour in the Blackmore Vale and two miles west of the broadly conical local landmark Duncliffe Hill. Above the west bank of the river, about one mile away, is the village of West Stour. The A30 London to Penzance road passes through the village. In the 2011 census the civil parish had a population of 573.

The River Stour is a 61 mi (98 km) river which flows through Wiltshire and Dorset in southern England, and drains into the English Channel. The catchment area for the river and its tributaries is listed as 480 square miles (1,240 km2).