Datchet is a village and civil parish in the Royal Borough of Windsor and Maidenhead in Berkshire, England. Located on the north bank of the River Thames, it was part of Buckinghamshire until boundary changes in 1974 transferred it to Berkshire. The village developed because of its close proximity to Windsor and the ferry service which connected it to the main London road across the River Thames. The ferry was later replaced by a road bridge at the foot of High Street, rebuilt three times, a rail bridge approaching Windsor across the river, and two road bridges above and below the village.