Alfie Benson is missing from his home in Clitheroe and police believe he may now be in Blackpool.
He was last seen in Blackpool on Wednesday.
He was wearing a blue parka coat and is described as white, 5ft tall with a slim build and short, light brown hair.
He has links to both Blackpool and Manchester.
Anyone with any information is asked to call 101 and quote reference number 1022 of December 19.