Dominic Kamara lives in Durham but is known to spend time in the Pallister Park area of Middlesbrough and Stockton.
The 17-year-old is 5ft 6ins, of slim build and has black hair shaved at the back and sides.
He was last seen at his home address on Monday, August 10.
Anyone with information is asked to contact police or Middlesbrough Council’s out of office duty team on 01642 524552.