Ibstone (previously Ipstone) is a village and civil parish within Wycombe district in Buckinghamshire, England. It is in the Chiltern Hills on the border with Oxfordshire, about two miles south of Stokenchurch. The village name is Anglo Saxon in origin and means 'Hibba's boundary stone', referring to the boundary with Oxfordshire. At the time of King Edward the Confessor the village was in the possession of Tovi, thane of the king, and was called Hibestanes. The politician Barbara Castle also lived in the village.