A missing person's appeal was circulated for Millie Maguire, after she disappeared from her home in Lancaster on Monday (July 22).
Police said Millie had links to Blackpool, Oldham, Bishop Aukland and Scotland. But the teenager was eventually found in Manchester.
A police spokesman said: "Good news. The missing 15-year-old girl from Lancaster has been found safe and well in the Manchester area.
"Thanks for sharing and supporting our appeal!"