Brill is a village and civil parish in west Buckinghamshire, England, close to the border with Oxfordshire. It is about 4 miles (6 km) north-west of Long Crendon and 7 miles (11 km) south-east of Bicester. At the 2011 Census, the population of the civil parish was 1,141. Brill has a royal charter to hold a weekly market, but has not done so for many years.

Buckinghamshire is a ceremonial county in South East England and one of the home counties. It is bordered by Northamptonshire to the north, Bedfordshire to the north-east, Hertfordshire to the east, Greater London to the south-east, Berkshire to the south, and Oxfordshire to the west. The largest settlement is the city of Milton Keynes, and the county town is Aylesbury.