Simon Baker, 40, was last seen in Dymchurch at around 2pm on Friday 8 December 2023.
He was reported missing on Wednesday 13 December.
It is not known what Simon was last seen wearing but he is known to usually wear a hat and three-quarter-length trousers and may be with his pet dog.
Kent Police is concerned for Simon’s welfare and officers are urging anyone who sees him or knows where he is to call 999 quoting reference 13-0589.
