Chipping Sodbury is a market town in the unitary authority of South Gloucestershire, south-west England, founded in the 12th century by William Crassus (or le Gros). It is the principal settlement in the civil parish of Sodbury, which also includes the village of Old Sodbury. Little Sodbury is a nearby but separate civil parish. Sodbury parish council has elected to be known as Sodbury Town Council. At the 2001 census the population of Chipping Sodbury was 5,066, but in the last decade the town has become part of a much larger built-up area due to the rapid expansion of nearby Yate, with which it is contiguous to the west. At the census the combined population of Yate and Chipping Sodbury was 26,855.