The teenager was last seen in Dublin South City Centre shortly after 9pm on August 27.
She is described as being 4’11” in height, of medium build with blue eyes and fair hair.
She was wearing grey tracksuit bottoms, Black jacket and white runners when last spotted.
Anyone with information regarding her whereabouts is asked to contact Ashbourne Garda Station on 01-8010600, the Garda Confidential Line on 1800 666 111 or any Garda Station.”