Sunnyside Hospital (1863–1999) was the first mental asylum to be built in Christchurch, New Zealand. It was initially known as Sunnyside Lunatic Asylum, and its first patients were 17 people who had previously been kept in the Lyttelton gaol. In 2000, Sunnyside Hospital was renamed Hillmorton Hospital and took over the mental health services that are based on the old Sunnyside Hospital grounds.