Galdenoch Castle is a tower house located on the Rhins of Galloway, about 4.5 miles west of Leswalt in the Dumfries and Galloway.
The castle was built in 1547, by Gilbert Agnew of Lochnaw in an L-shaped plan. It had three storeys and a garret, the ground floor is vaulted.
Today the building is in ruined and it is listed as a Scheduled Monument.