Udny Castle
57°19′53″N 2°11′50″W / 57.331481°N 2.197298°W
Udny Castle is a tower house in the parish of Udny, south-west of the village of Pitmedden and north-east of the hamlet of Udny Green, Aberdeenshire, in the north-east of Scotland. The area is generally flat but the castle is sited on the highest ground and can be seen for a considerable distance. Its exact construction date is unknown, but its foundations probably date from the late 14th or early 15th century. Additional storeys were added and a later extension, described as a "modern mansion", was incorporated but subsequently demolished. It is a Category A listed building.