Hayley Jade O’Brien was last seen at her home address in the Monifieth area of Angus at about 1.15pm.
She is described as being 4ft 11ins, of heavy build and with long brown hair in a ponytail.
When last seen she was wearing a white blouse, grey trousers, grey cardigan and black shoes. She was carrying a cream backpack with yellow emoji symbols on it.
Anyone with information is asked to contact police on 101, speak to any officer or call Crimestoppers on 0800 555 111.