Marlow is a town and civil parish within the Unitary Authority of Buckinghamshire, England. It is located on the River Thames, 4 miles (6 km) south-southwest of High Wycombe, 5 miles (8 km) west-northwest of Maidenhead and 33 miles (53 km) west of central London.

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.