Blewbury is a village and civil parish at the foot of the Berkshire Downs about 4 miles (6.4 km) south of Didcot, 14 miles (23 km) south of Oxford and 50 miles (80 km) west of London. It was part of Berkshire until the 1974 boundary changes transferred it to Oxfordshire. The 2011 Census recorded the parish's population as 1,581.A number of springs rise at the foot of the escarpment of the downs. Some springs feed a small lake called the Watercress Beds, where watercress used to be cultivated.