Teighlor O’Hara was last seen at her home on Old Chester Road at around 5.30pm on Friday, October 25.
She is white, 5ft 3in, of slim build with long dark brown hair.
It is unsure what clothing she was wearing at the time when she went missing.
Teighlor is known to frequent areas such as Liscard, Noctorum and Woodchurch.
She is also known to the County Road area of Walton and Whitechapel in Liverpool city centre.
Teighlor, or anyone who has knowledge of her whereabouts, is asked to contact Merseyside Police via social media @MerPolCC, call 101 or contact @missingpeople on 116 000 quoting log 1148 of 28 October 2019.