Peter Toth was last seen on Tuesday 30 March 2021 at around 11.30am in the Upper Stone Street area.
He is described as being five feet and eleven inches tall, of slim build with short, straight dark brown hair and stubble.
Peter is believed to be wearing a white t-shirt, blue jogging bottoms and red trainers.
Inspector Steve Kent of Maidstone’s Community Safety Unit said: ‘We are very concerned for Peter’s welfare and are asking anybody who sees him or knows where he might be to contact us.’
Anyone who has information is urged to call Kent Police on 999, quoting reference 30-1311.