Tyler Ogden-Hooper, aged 15, has been missing since July 13.
He has links to Leighton Buzzard, Houghton Regis and Luton, and officers are growing increasingly concerned for his welfare.
Tyler is described as white, 5ft 3ins tall with short straight blond hair.
He was last seen wearing tracksuit bottoms and white trainers.
If you believe you have seen Tyler or know of his whereabouts, contact Bedfordshire Police on 101.