Dupplin Castle is a country house and former castle in Perth and Kinross, Scotland, situated to the west of Aberdalgie and northeast of Forteviot and Dunning. It overlooks the Earn Valley.
The earliest known owner of the castle was Sir William Oliphant in the late 13th century. The Battle of Dupplin took place in the vicinity in 1332, when it was won by Edward Baliol.
The castle was destroyed in 1461 and rebuilt. In 1623 it fell into the Hay family, after it was granted to Charles I's Lord Chancellor, the 1st Earl of Kinnoull. It was again rebuilt in 1688, though retained its earlier tower and some remnants of the earlier castle. A fire gutted the castle in 1827, prompting a full rebuilding and restoration.
The castle was rebuilt as a country house under architect William Burn in 1828-32 at a cost of roughly £30,000. In 1911 it was purchased by whisky baron Sir John Alexander Dewar, who entitled himself as the 1st Baron Forteviot of Dupplin five years later. In the 1920s or 1930s there was a fire in the interior. It was demolished in August-October 1967. A new house was built in 1970 on the foundations.