Overtoun House is a 19th-century country house and estate in West Dunbartonshire, Scotland. Situated on a hill overlooking the River Clyde, it is 2km north of the village of Milton and 3km east of the town of Dumbarton. The house, an example of Scottish Baronial architecture, was built in the 1860s, and was donated to the people of Dumbarton in 1938. It was subsequently a maternity hospital, and now houses a Christian centre. The house is protected as a category A listed building, while the grounds are included in the Inventory of Gardens and Designed Landscapes in Scotland.
Overtoun Bridge, an arched approach bridge over the Overtoun Burn within the estate, has gained media attention because of the unusually large number of dogs that have reportedly leaped to their deaths there.