The Parish of St Mary the Virgin, Long Wittenham, with St Peter, Little Wittenham is part of the Bridge Group of parishes that also includes St Michael and All Angels, Clifton Hampden and St Paul, Culham.
The Bridge Group is part of the Dorchester Team which includes the magnificent Dorchester Abbey and the parishes of Warborough, Stadhampton, Berinsfield, Drayton St Leonard, Marsh Baldon, Toot Baldon and Nuneham Courtenay.
In turn, the Dorchester Team is part of the Deanery of Aston and Cuddesdon, the Archdeaconry of Oxfordshire and the Diocese of Oxford.
Long Wittenham is a village and small civil parish about 3 miles (5 km) north of Didcot and 3.5 miles (5.6 km) southeast of Abingdon. It was part of Berkshire until the 1974 boundary changes transferred it from Berkshire to Oxfordshire and the former Wallingford Rural District to the South Oxfordshire District Council.
The village is on the outside of a meander in the River Thames.