Ashbury is a village and large civil parish at the upper end of the Vale of White Horse. It was part of Berkshire until the 1974 boundary changes transferred it to Oxfordshire. The village is centred 7 miles east of Swindon in neighbouring Wiltshire. The parish includes the hamlets of Idstone and Kingstone Winslow. The 2011 Census recorded the parish's population as 506.