David Hill has not been seen since he left his home to go running on the afternoon of Wednesday 30 December 2020.
The 52-year-old is last known to have been in the Dennes Lane area at around 2.10pm on that date, and has previously completed runs across country towards Old Romney.
David is described as being six feet tall, of stocky build, with receding grey hair. He was last seen wearing a red Adidas coat and black Adidas tracksuit bottoms.
Anyone with information that could assist is asked to call Kent Police on 101 quoting 30-1225.