The Cathedral Grammar School is an independent, Anglican preparatory day school in Christchurch, New Zealand. The school is situated on a site covering two blocks in mid-Christchurch next to the Avon River and adjacent to Hagley Park, which it uses for its playing fields. It is in close proximity to Christ's College, the Canterbury Museum, the Christchurch Art Gallery and the Christchurch CBD. Almost immediately after its establishment, admission to the school was also opened to boys who were not choristers, and girls were accepted into the school from 1988.