Calderwood Castle was located in East Kilbride, Scotland. The castle was situated near the banks of the Rotten Calder Water in what is now Calderglen Country Park. Most likely constructed in the early to mid fifteenth century by the Maxwell family, the original peel tower collapsed in 1773. It was replaced by an extension to a large 18th-century country house called Calderwood House, which has itself since been demolished along with a later 1840s Gothic Revival addition.