Cumnor is a village and civil parish 3½ miles west of the centre of Oxford, England. The village is about 2 miles south-west of Botley and its centre is west of the A420 road to Swindon. The parish includes Cumnor Hill,, Chawley, the Dean Court area on the edge of Botley and the outlying settlements of Chilswell, Farmoor, Filchampstead and Swinford. It was within Berkshire until the 1974 local government boundary changes transferred it to Oxfordshire.