Canons Ashby House is a Grade I listed Elizabethan manor house located in the village of Canons Ashby, about 11 miles (17.7 km) south of the town of Daventry in the county of Northamptonshire, England. It has been owned by the National Trust since 1981 when the house was close to collapse and the gardens had turned into a meadow. "The Tower" of the building is in the care of the Landmark Trust and available for holiday lets.

The Landmark Trust is a British building conservation charity, founded in 1965 by Sir John and Lady Smith, that rescues buildings of historic interest or architectural merit and then makes them available for holiday rental. The Trust's headquarters is at Shottesbrooke in Berkshire.