It is a grammar school, with Tracey O'Brien as the Headmaster since September 2023.

Wallington High School for Girls was established in 1888 by a collective of nuns.

The school building has since changed many times, and now accommodates an estimated 2310 students with 210 in each year group, as well as a Sixth Form College.

It moved to Woodcote Road in 1965, the same year it changed its administration from Surrey County Council to the borough of Sutton.

Each form is a member of one of the seven different houses, each named after an influential woman.