Bayworth is a hamlet

Hamlet (place)

A hamlet is usually a rural settlement which is too small to be considered a village, though sometimes the word is used for a different sort of community. Historically, when a hamlet became large enough to justify building a church, it was then classified as a village...

 in the civil parish of Sunningwell

Sunningwell

Sunningwell is a village and civil parish about south of Oxford, England. The parish includes the village of Bayworth and the eastern part of Boars Hill...

 about 3 miles (4.8 km) south of Oxford. Bayworth was part of Berkshire

Berkshire

Berkshire is a historic county in the South of England. It is also often referred to as the Royal County of Berkshire because of the presence of the royal residence of Windsor Castle in the county; this usage, which dates to the 19th century at least, was recognised by the Queen in 1957, and...

 until the 1974 boundary changes

Local Government Act 1972

The Local Government Act 1972 is an Act of Parliament in the United Kingdom that reformed local government in England and Wales on 1 April 1974....

 transferred it to Oxfordshire.

Bayworth is mentioned in a charter of 956, when the manor was given to Abingdon Abbey

Abingdon Abbey

Abingdon Abbey was a Benedictine monastery also known as St Mary's Abbey located in Abingdon, historically in the county of Berkshire but now in Oxfordshire, England.-History:...

, which held it until 1538. There was a chapel in the village in the 14th century, but it appears to have fallen into decay by the 18th century. In the 17th and 18th centuries Bayworth was the residence of the Baskerville family.