The girl, who police have not named, was last seen leaving an address in Flagstone on foot on October 6 but has not been seen since.
It’s believed she may be in the Jimboomba area.
She is described as having a slim build, approximately 164cm tall, with short dark hair with blonde tips and brown eyes.
She was last seen wearing a brown crop top and blue jeans.
Anyone with information is urged to contact police.