Cerys was last seen at 1.30pm today at Quakers Yard Train Station in Edwardsville, Wales.
In a public call to help find the schoolgirl, police urged users to share the appeal.
The schoolgirl has links to the Cwmbran area, said South Wales Police.
COPS are urgently hunting for a 14-year-old girl who went missing at a train station.
Cops urged anyone with information to come forward immediately.