The church of Our Lady of Bloxham, informally called St Mary's Bloxham, is the Church of England parish church in Bloxham, Oxfordshire. It is notable for its 14th-century tower and spire, which is the highest in Oxfordshire. It is unusually large for a parish church. The architectural historian Jennifer Sherwood described it as "one of the grandest churches in the country." It is a Grade I listed building.