Castle Forbes is a 19th-century country house in the Scottish baronial architecture style near Alford in Aberdeenshire, Scotland. The 6,000-acre (2,400-hectare) Vale of Alford estate has been home to the Forbes for over 600 years. The original house was named Putachie. The present building overlooking the River Don was built in 1815 by the 17th Lord Forbes, to designs by the architect Archibald Simpson. However, after Simpson encountered structural problems and the original section of the house (from c. 1731) began to crack, Simpson was dismissed and the work was completed by the City Architect of Aberdeen, John Smith.