St Mary's Church, Barnes, is the parish church of Barnes, formerly in Surrey and now in the London Borough of Richmond upon Thames. It is a Grade II* listed building.

Barnes is a district in south London, England, part of the London Borough of Richmond upon Thames. It takes up the extreme north-east of the borough, and as such is the closest part of the borough to central London. It is centred 5.8 miles (9.3 km) west south-west of Charing Cross in a bend of the River Thames.