Authorities responded about 4:20 a.m. to the 1200 block of South Kedvale Avenue and found the teen with a gunshot wound to her chest, Chicago police said.
She was taken to Mount Sinai Hospital, where she was pronounced dead at 4:59 a.m., according to the Cook County medical examiner’s office.
The girl was identified as Demyra Thornton of Oakland on the South Side, the medical examiner’s office said.
Police were unable to immediately determine the circumstances of the shooting.
No arrest was announced.