Castle Drogo is a castle in Drewsteignton, Devon, England. It was built in the 1910s and 1920s for Julius Drewe (businessman, and founder of the Home and Colonial Stores) to designs by architect Edwin Lutyens.

The granite-built stately home borrows styles of castle building from the medieval and Tudor periods, along with more minimalist contemporary approaches. Its defensive characteristics are essentially decorative.

The property was given to The National Trust in 1974, and was the first 20th century property the charity acquired.