Egham is a town in the Borough of Runnymede in Surrey, England, approximately 19 miles (31 km) west of central London. First settled in the Bronze Age, the town was under the control of Chertsey Abbey for much of the Middle Ages. In 1215, Magna Carta was sealed by King John at Runnymede, to the north of Egham, having been chosen for its proximity to the King's residence at Windsor. Under the Dissolution of the Monasteries in the early 16th Century, the major, formerly ecclesiastical, manorial freehold interests in the town and various market revenues passed to the Crown.

The Borough of Runnymede is a local government district with borough status in Surrey, England. Its council is based in Addlestone and the borough also includes the towns of Chertsey and Egham. The borough is named after Runnymede, a water meadow on the banks of the River Thames near Egham, which is connected with the sealing of Magna Carta by King John in 1215.