Harry Scott was last seen in Dover town centre at around 3pm on Monday 16 May 2022.
The 24-year-old is described as around five feet, nine inches tall, with thick brown hair and a beard.
He is believed to have been wearing blue trainers, blue shorts and a grey vest top and was carrying a blue satchel bag and a black rucksack when last seen.
Officers are concerned for his welfare and urge anyone who has seen him or knows of his whereabouts to call 101, quoting reference 17-0160.