Kings Langley is a village, former manor and civil parish in Hertfordshire, England, 21 miles north-west of Westminster in the historic centre of London and to the south of the Chiltern Hills. It now forms part of the London commuter belt. The village is divided between two local government districts by the River Gade with the larger western portion in the Borough of Dacorum and smaller part, to the east of the river, in Three Rivers District. It was the location of Kings Langley Palace and the associated King's Langley Priory, of which few traces survive.

Hertfordshire is a ceremonial county in the East of England and one of the home counties. It borders Bedfordshire to the north-west, Cambridgeshire to the north-east, Essex to the east, Greater London to the south and Buckinghamshire to the west. The largest settlement is Watford, and the county town is Hertford.