Ilford County High School is a selective secondary grammar school for boys located in the town of Barkingside of the London Borough of Redbridge. The school was formerly called Park High Grade School and as a result old boys are referred to as Old Parkonians.

Barkingside is an area in Ilford, in the London Borough of Redbridge. It includes the major road junction of Fullwell Cross which also gives its name to the locality near that roundabout. The area is situated 10.6 miles (17km) north east of Charing Cross. Prior to 1965, it formed part of the borough of Ilford in the historic county of Essex.