Ryan McGuinness was last seen on the main street in Swords on Saturday, January 25th at 4 o'clock.
The teenager is described as being 5'8", with brown hair, of slim build with blue eyes.
When last seen Ryan was wearing a blue tracksuit, black Nike footwear and a black body warmer.
Ryan is known to frequent the Ballyfermot and Dublin 8 areas.
Anyone with information on his whereabouts are asked to contact Gardaí in Balbriggan on 01 802 0510.
