Sutton Grammar School is a selective state grammar school for boys aged 11–18 with a coeducational sixth form. Located in South London, the school's main site is in Sutton and its playing fields are in neighbouring Cheam.

Sutton is a town in the London Borough of Sutton in South London, England. It is the administrative headquarters of the Outer London borough, on the lower slopes of the North Downs. It is 10 miles (16 km) south-southwest of Charing Cross, one of the fourteen metropolitan centres in the London Plan. The population of the town was counted as 41,483 in the 2011 census, while the borough overall counted 204,525.