Gardaí are seeking help from the public in locating 13-year-old Martin Hoare from Palmerstown in Dublin 20.
He was last seen on the 18 February in the Tallaght area.
Martin is described as 5'9'' and of slight build, with short brown hair and blue eyes.
When last seen he was wearing a grey hoody with white stripes, grey tracksuit bottoms with a white stripe and white runners.
There is a possibility that Martin may travel to Co Tipperary.
Anyone with information is asked to contact Tallaght Garda station on 01 6666000.