West Challow is a village and civil parish about 2 miles (3 km) west of the market town of Wantage in the Vale of White Horse, England. The village is on Childrey Brook, which is a tributary of the River Ock. West Challow was part of Berkshire until the 1974 boundary changes transferred the Vale of White Horse to Oxfordshire. The 2011 census recorded the parish's population as 184.