Police are appealing for information about the whereabouts of missing Ismail Sherzad.
He was last seen at his home address in Troon Crescent in Wellingborough on Saturday, August 27.
Ismail, 16, is of middle Eastern appearance.
He is 5ft 5in, of slim build and has dark hair and brown eyes, and was last seen wearing dark clothing.
A police spokesman said: “We believe he may now be in the Kent area.”
Officers are urging anyone with information about Ismail’s whereabouts to contact Northamptonshire Police on 101.