Princess Margaret Hospital for Children (PMH) is a centre for paediatric research and care. The hospital is located on Roberts Road in Subiaco, Western Australia. Subiaco is an inner western suburb of Perth, Western Australia, situated to the north of Kings Park. Western Australia is a state occupying the entire western third of the Australian continent. It is the state's only specialist children's hospital. Together with King Edward Memorial Hospital for Women it makes up the Women's and Children's Health Service. King Edward Memorial Hospital for Women (KEMH is located at 374 Bagot Road Subiaco, Western Australia.
The hospital originated as the Perth Children's Hospital in 1909 after 12 years of community fundraising. Year 1909 ( MCMIX) was a Common year starting on Friday (link will display full calendar of the Gregorian calendar (or a Common year starting The original facilities included 40 beds, an operating theatre and outpatient department. The current name, Princess Margaret Hospital for Children, was adopted in 1949, naming it after the late Princess Margaret, sister of Queen Elizabeth II. Year 1949 ( MCMXLIX) was a Common year starting on Saturday (link will display the full calendar of the Gregorian calendar. For the ship see RMS Queen Elizabeth 2 Elizabeth II (Elizabeth Alexandra Mary Context States headed by Elizabeth II
In 1994 the organisational structure for the Princess Margaret Hospital for Children and King Edward Memorial Hospital's merged (but not their locations). In 2002 that organisation was renamed Women's and Children's Health Service. 
In 2005, there were 254 beds and 20,000 inpatients. 
From mid-2006, Princess Margaret Hospital separated from the Women's and Children's Health Service and became a part of the newly formed Child and Adolescent Health Service.