Russel Burrdett-Deakin was reported missing from his home at around 6.30pm on Wednesday 6 September and there are growing concerns for his welfare.
Officers are seeking help to locate a teenage boy missing from Maidstone.
Russel is 17 and of slim build. He has dark hair with blue colourings and was last seen wearing red or maroon bottoms, along with a red Champion hooded top.
Russel was also carrying a black Under Armor rucksack.
Anyone with information on his whereabouts should call 999 immediately, quoting reference 06-1384.