Charlie was last seen leaving his home in the North Covesea Terrace area of the town around 8.30am on Monday, April 12 when he was believed to be walking to school.
He may also have returned home to collect a bright pink coloured bicycle.
Police Scotland said: “As well as his home town, Charlie is known to frequent the Elgin area.
“Charlie is described as being approximately 5ft 2in tall, of slim build wearing school uniform comprising black puffa style jacket, white shirt, black trousers with black and white coloured Nike trainers.
“He is also believed to have in his possession a black and white coloured Vans rucksack.
“Anyone who has seen Charlie or who may have knowledge as his whereabouts are asked to contact police on 101 and quote incident 0916 of 12 April.”