Westminster School is an independent, Uniting Church, Early Learning to Year 12, coeducational, day and boarding school located at Marion, South Australia, 12 km south of Adelaide. Founded as a Methodist day and boarding school for boys, the school was opened by the Prime Minister Robert Menzies in 1961 and is named after Westminster School in London. The school became co-educational in 1978, and has a current enrolment of around 1150 students.