Avon Dassett is a village and civil parish in the Stratford district of Warwickshire, England, nestling among the Burton Dassett Hills about four miles east of Kineton and seven miles north of Banbury in Oxfordshire.

The name Dassett is first attested for this location in the Domesday Book of 1086 as Derceto and in 1173 as Derchet.

This name comes from the Common Brittonic words that survive in modern Welsh as derw ("oaks") and coed ("woodland"), referring to the adjacent wolds.

This Brittonic name, thought to be found also in Dosthill and Burton Dasset, was then extended to specify that the settlement in question was in the part of Dassett on the River Avon.

He was central to the Profumo affair, a sex and spy scandal in that era.