Northampton Police are desperate for anybody who may have seen Abbie to call 101.
Abbie Marshall was last seen in Raunds on Sunday, October 18, at around 2pm, and police are appealing for her to make contact to let them know she is safe and well.
Abbie is white and around 5ft 2in. She was last seen wearing a black jacket, dark coloured t-shirt and ripped blue jeans. She was carrying a small silver handbag.
As well as Northamptonshire, Abbie has links to Aylesbury, Yorkshire and Harrow.
Anyone who knows of her whereabouts is asked to call police on 101 using reference MPE 1/3072/20 or independent charity Crimestoppers anonymously on 0800 555 111.