Megan Barrow-Chiovitti, also known as Pagan, was last seen in the Canterbury Street area at around 2.30pm on Sunday, November 1.
The 17-year-old is described as white, around 5ft 2inches tall, slim build, with straight black hair and hazel eyes.
She was last seen wearing a blue hooded top, blue jogging bottoms, a black jacket, black shoes, and may be carrying a black bag.
Megan has known links to Dartford.
Anyone with information is urged to call 999 quoting reference 02-0008.
