Maidenhead is a market town in the Royal Borough of Windsor and Maidenhead in the county of Berkshire, England, on the southwestern bank of the River Thames. In the 2021 Census, it had an estimated population of 70,374 and forms part of the border with southern Buckinghamshire. The town is situated 27 miles (43 km) west of Charing Cross, London and 13 miles (21 km) east-northeast of the county town of Reading. The town differs from the Parliamentary constituency of Maidenhead, which includes a number of outer suburbs and villages, including villages which form part of the Borough of Wokingham such as Twyford, Charvil, Remenham, Ruscombe and Wargrave.

The Royal County of Berkshire, commonly known as simply Berkshire, is a ceremonial county in South East England. It is bordered by Oxfordshire to the north, Buckinghamshire to the north-east, Greater London to the east, Surrey to the south-east, Hampshire to the south, and Wiltshire to the west. Reading is the largest settlement and the county town.