Sinead McCluskey, from the Bolehall area of Tamworth, was last seen at around mid-day on Sunday, January 31, when she said she was going to stay with a friend but she did not arrive.
Sinead is described as a white female, 5ft 1 inch tall with brown shoulder length hair that she sometimes wears in a ponytail. She was last seen wearing a short green parker-style coat with a hood, blue jeans and white trainers.
Sinead has links to various areas of Tamworth and Warwickshire.
Anyone with any information is asked to call Staffordshire Police on 101, quoting incident 129 of February 2.