Brendan Bratby had last been seen at an address on Swinton Place at about 3.45pm on Tuesday.
Concern was growing for the teenager, who had gone missing without a phone or money.
Police said on Wednesday that he was found safe and well in the city.
13-year-old reported missing in Glasgow found safe and well
A vulnerable 13-year-old who went missing in Glasgow has been found safe and well.