The Town of Sunnybank in the 19th century was part of a much larger area known as the Parish of Yeerongpilly, but a distinct town outside of the area known as Brisbane. In 1885, the railway line was extended from Yeerongpilly, and names had to be given to the railway stations along the line. Sunnybank got its name from a local farm, Sunnybrae, owned by the Gillespies, when of land were taken over for the railway. "Brae" is Scottish for the English word "bank", so the area was given boundaries and named Sunnybank.