Skye Bond, 17 was reported missing from her home in Keighley on 25 June.
Skye was seen on Friday 30 June in the Armley area of Leeds.
Skye is described as a mixed race female and 5 foot 7 tall.
It’s believed she could has changed clothes and is now wearing dark grey leggings with patterns on them, with a grey/blue crop top, grey Nike jumper with black and white writing on it and black and white trainers.
She also has links to Bradford and Birmingham areas.
Detective Inspector Richard Thornton of Bradford CID said:
“It’s now been a week since Skye went missing and we are really concerned for her welfare.
“We know she was in the Armley area on Friday and we would urge anyone who has seen her to contact us urgently.”
Anyone with information on Skye’s whereabouts is asked to contact police via 101 or use the live chat facility at www.westyorkshire.police.uk/contactus quoting log 1461 of 25 June.