Forty Hall is a manor house of the 1620s in Forty Hill in Enfield, north London. The house, a Grade I listed building, is today used as a museum by the London Borough of Enfield. Within the grounds is the site of the former Tudor Elsyng Palace.

The Hall’s permanent exhibition tells the story of the house and its estate throughout the ages and looks at the life and times of Sir Nicholas Rainton and life in the seventeenth century through a range of visual and audio interpretation and displays. There is also a range of guided tours, led by a Jacobean character. The exhibition programme focuses on art, ecology and heritage.

The estate of around 107 hectares (260 acres) makes up part of the London Metropolitan Green Belt. Around the house are formal gardens and a small lake. The remainder includes a park that is open to the public and a farm. An avenue of trees runs down the hill from the house into the valley of the Turkey Brook, also known locally as Maidens Brook. The northern and much of the southern boundary are marked by the former course of the New River.