Muscab Mohammed Ahmed has been missing now for 7 days.
The 16-year-old was last seen in the Monacurragh area on Wednesday 28th June at around 2 pm.
He is described as being 5 feet 8 inches in height with brown eyes and black hair.
He was last seen wearing white trousers, a black and white jacket, and black runners.
Anyone with any information can contact Carlow garda station.