St John the Baptist's Church Mongewell
 St John the Baptist's Church Mongewell is a redundant Anglican parish church now partly in ruins in the hamlet of Mongewell Oxfordshire England. It is designated by English Heritage as a Grade II listed building and is under the care of the Churches Conservation Trust. The ruins stand on the east bank of the River Thames next to the former Carmel College to the north of Mongewell Park 2.5 miles (4 km) south of Wallingford and near The Ridgeway long-distance path.