Paston Great Barn is a medieval barn near Paston Hall on the southeast edge of the village of Paston in northeast Norfolk, owned by the North Norfolk Historic Buildings Trust. Dating from 1581, the building has a long association with the Paston family. A scheduled monument and a grade II* listed building, the barn is the centre of a 0.95 hectares (2.3 acres) biological Site of Special Scientific Interest, a National Nature Reserve and a Special Area of Conservation. It is in the Norfolk Coast Area of Outstanding Natural Beauty.