The Isle of Wight Festival 1970 was a music festival held between 26 and 31 August 1970 at Afton Down, an area on the western side of the Isle of Wight in England. It was the last of three consecutive music festivals to take place on the island between 1968 and 1970 and often acknowledged as the largest musical event of its time, with a larger attendance than Woodstock. Although estimates vary, Guinness World Records estimated 600,000 to 700,000 people attended. It was organised and promoted by local brothers, Ron and Ray Foulk through their company Fiery Creations Ltd and their brother Bill Foulk. Ron Smith was site manager and Rikki Farr acted as compere.

Afton Down is a chalk down near the village of Freshwater on the Isle of Wight. Afton Down faces Compton Bay directly to the west, while Freshwater is approximately one mile north.