Lancashire Police said it had been growing "increasingly concerned for her welfare" after she disappeared from home in Blackpool on Monday (January 6).
Yesterday, the force made an urgent appeal to help find Reah, who had last been seen in the Devonshire Road area on Monday evening.
The police appeal described Reah as 13 years of age, but the force has now stated that she is in fact 12-years-old.
This afternoon, it has been confirmed that the schoolgirl had been found "safe and well" and has since returned to her family.
"Thanks to everyone who shared our appeal."