Royal Air Force Ventnor or more simply RAF Ventnor is a former Royal Air Force radar station located 0.7 miles (1.1 km) north east of Ventnor on the Isle of Wight, England. It was initially constructed in 1937 as part of a World War II coastal defence programme codenamed Chain Home. The site played an important role during the Second World War, providing early warnings of incoming bomber attacks carried out by the Luftwaffe.

Ventnor is a seaside resort town and civil parish established in the Victorian era on the southeast coast of the Isle of Wight, England, eleven miles (18 km) from Newport. It is situated south of St Boniface Down, and built on steep slopes leading down to the sea. The higher part is referred to as Upper Ventnor ; the lower part, where most amenities are located, is known as Ventnor. Ventnor is sometimes taken to include the nearby and older settlements of St Lawrence and Bonchurch, which are covered by its town council. The population is 5,567 according to the 2021 Census