17-year-old John Byrne, from Clontarf, Dublin, has been missing since June 10.
He is described as being 5’ 7’’, of slight build, and with brown hair.
Anyone who may have information on John’s whereabouts is being asked to contact Clontarf Garda Station on 01 6664800, The Garda Confidential Telephone Line 1800 666 111 or any Garda Station.