Darryl Carpenter is last known to have been in the Gillingham High Street area on Thursday 19 November 2020.
The 17-year-old is described as being 5 foot 4 inches tall with a medium build and short, brown hair which is slicked back.
He was last seen wearing grey tracksuit bottoms, a grey tracksuit jacket, a white T shirt, black trainers and a black Dolce and Gabbana baseball cap. He was also carrying a small, black shoulder bag.
Anyone with information is asked to contact us on 101 quoting 16-1474.