Georgia Mitchell was last seen on Quigley Avenue in Bootle on Saturday 2 October.
She is described as a white female, 5ft 5in tall of medium build with dark brown shoulder length hair.
Georgia was last seen wearing a jacket with blue denim jeans and black slip-on trainers.
She is known to frequent the Sefton area including Bootle and Netherton.
Merseyside Polce are increasingly concerned about Georgia’s whereabouts. Please pass on any sightings of her via: https://www.merseyside.police.uk/ro/report/mp/v2/report-sighting-of-missing-person-form/ or any other information to the Missing person unit on 0151 777 3600, @MerPolCC, contact 101 or the charity Missing People on 116 000.