Wilderness School is an independent, non-denominational Christian, day and boarding school for girls, located in Medindie, an inner northern suburb of Adelaide, South Australia.
Established by the Brown sisters in 1884 with four girls and one small boy, Andrew Muecke, as students, Wilderness is a Reception to Year 12 school, and also caters for Year 13. The school currently enrols approximately 750 students, including up to 80 boarders. In 2003, The Australian declared The Wilderness School one of the ten highest achieving schools in Australia.
Wilderness School is affiliated with the Association of Heads of Independent Schools of Australia (AHISA), the Junior School Heads Association of Australia (JSHAA), the Australian Boarding Schools' Association, the Alliance of Girls' Schools Australasia (AGSA) and the Independent Girls' Schools Sports Association (IGSSA).