She was last seen on the afternoon of February 9 at a Noble Avenue property in Pallara, and has not been heard from since.
Her family and police have serious concerns for her welfare due to her young age, and the fact that she has a medical condition.
The girl is described as Pacific Islander in appearance, about 160cm tall with dark brown shoulder-length curly hair and dark brown eyes.
She is believed to be wearing a black t-shirt, shorts, and a pair of black Nike shoes.
Police are appealing to the girl, or anyone with information about her whereabouts, to immediately come forward.