Police are appealing for anyone who sees a missing teenager to get in touch.
Declan Hayes, who lives in Bradford, is described as 5ft 9in tall and of slim build. Police say he has short brown hair and when last seen he was wearing a grey hooded top, black jeans and blue trainers.
It is thought Declan was last seen at 6.30pm on Saturday, August 26 somewhere in the Wakefield area.
The police spokesman said that Declan himself or anyone who sees him is asked to call police on 101 quoting log 2116 of Saturday, August 26.