Wytham is a village and civil parish on the Seacourt Stream, a branch of the River Thames, about 3 miles (5 km) northwest of the centre of Oxford. It is just west of the Western By-Pass Road, part of the Oxford Ring Road (A34). The nearest village is Godstow. Wytham was the northernmost part of Berkshire until the 1974 boundary changes transferred it to Oxfordshire.