Mercedes College is an independent Roman Catholic single-sex secondary day school for girls, located in the Perth central business district, Western Australia.

The Sisters of Mercy is a religious institute for women in the Roman Catholic Church. It was founded in 1831 in Dublin, Ireland, by Catherine McAuley. As of 2019, the institute has about 6200 sisters worldwide, organized into a number of independent congregations. They also started many education and health care facilities around the world.