Detectives would like to speak to anyone who has information about the whereabouts of Georgina Foro, 17, who was last seen in Dewsbury town centre at around 11.30am on Saturday, September 4.
A number of enquiries have been ongoing to locate Georgina, who is known to have links to the Luton, London and Birmingham areas.
Police would appeal to anyone in those areas who has any information about her whereabouts to contact officers.
Georgina is described as a white female with long black hair, and was last seen wearing a white shirt, grey jacket, black trousers and black shoes.
Anyone with information is asked to contact West Yorkshire Police by calling 101, or online via online via www.westyorkshire.police.uk/101livechat quoting reference 13210454950.