The girl was in Walthamstow between 12.15am and 12.30am on Saturday when she met three men, police said.
She was taken to a garage area at the end of Hibbert Road, near Theydon Street, where she was pinned down and raped by two of the men.
The girl managed to call a friend who came to the scene and they left together. The suspects then left the area.
More top news
Detectives investigating the death of a 27-year-old man in an east London park have charged a teenager
Shoppers evacuated from Topshop in central London after a 'fire breaks out' in the basement
Police are appealing to find an absconder from a mental health unit in Haringey