Police are appealing for help to trace missing Dean Cornwall from St George's Street Cheltenham.
Dean was last seen on July 12 but reported missing on July 21.
He is believed to have various issues but his family state his disappearance is out of character, and he has not been heard from.
He is 25 years old and is described as white, of average build, with short brown hair, 5 feet 9 inches tall and with a local accent.
Although it is not known what he is wearing, his usual clothing includes jeans and trainers.
Anyone with information regarding his whereabouts is asked to ring 101, quoting incident 229 of July 21.