Mitford Old Manor House is an historic English manor house at Mitford, Northumberland and is a Grade II* listed building. The Manor of Mitford was held from ancient times by the Mitford family.
The Manor House previously stood, adjacent to the old church of St Mary Magdalene, on the eastern side of the River Wansbeck. The substantial ruins now standing on the site represent the remains of a 16th century house and of a porch tower built in about 1637.
The original house was substantially demolished and rebuilt in about 1810, then abandoned by the Mitfords when they built a new mansion house, Mitford Hall, and park on the opposite bank of the river in 1828. In the 20th century, a modern house was created out of the kitchen wing.