Sandown Fort (map reference SZ597839) is a fort built in Sandown on the Isle of Wight in the middle of Sandown Bay 108 feet above sea level. It is one of the many Palmerston Forts built on the island to protect it in response to a perceived French invasion. Construction of the fort began in April 1861 and was completed by September 1864 at a cost of £73,876. In later documents it is often referred to as Granite Fort.
Much of the fort has now been converted to the Isle of Wight Zoo.