The Castle of Fiddes is a 16th-century tower house in Aberdeenshire, Scotland, located around 6 kilometres (3.7 mi) south-west of Stonehaven. It is dated 1592 on a window lintel, with a later date of 1673 on the east wall suggesting a renovation at this time.^[1] It was the property of the Arbuthnott family, who sold it in the later 17th century to the Thomson family of Arduthie.^[2] It was modernised around 1930 and remains occupied. It is a category A listed building.^[3]

The four-storey tower is built on an unusual variant of the L-plan, with a large circular stair tower and several projecting turrets supported on corbels.^[1]