Guildford Museum is the main museum in the town of Guildford, Surrey, England. The museum is on Quarry Street, a narrow road lined by pre-1900 cottages running just off the pedestrianised High Street. This main site of the museum forms the gatehouse and annex of Guildford Castle, which the staff help to run. It is run by Guildford Borough Council and has free entry between 11am and 4:45pm on Monday to Saturday. It is closed on Sundays and on Christmas Day.

Guildford Castle is in Guildford, Surrey, England. It is thought to have been built by William the Conqueror, or one of his barons, shortly after the 1066 invasion of England.