Gardaí in Clontarf are seeking assistance in tracing 16-year-old Laura Dunne of Woodside, Clontarf.
Laura has been missing since she left her home at 10am on Friday, December 27.
She is described as 5 ft 1 in tall, with brown hair and hazel eyes.
When she was last seen, she was wearing black jeans, black quilted jacket and a matching pink hat and scarf.
Gardaí say they have a photo available for viewing.
Anyone with information is asked to contact the gardai at Clontarf on 01 6664800 or the Garda confidential line on 1800 666 111.