Raymond Taylor, aged 66, was last seen in Barnsley town centreÂ at around 11.15am on Saturday.
He wasÂ wearing a dark beanie hat, a darkÂ puffer jacket, dark jeans and black trainers at the time.
Mr Taylor wears glasses and has hearing aids in both ears.
He regularly visits Sheffield and has previously lived in London.
Â Anyone with any information on his whereabouts should call South Yorkshire Police on 101 and quoteÂ incident number 546 of Â December 29.