The girl was in a residence in the 6600-block of South Marquette at about 7:30 p.m. when an acquaintance was handling a firearm and accidentally shot her in the eye, police said.
She was pronounced dead at the scene. The girl was identified to the Cook County Medical Examiner's Office as Eshani Mayfield.
Multiple teenagers were in the house when the shooting occurred. A teenage girl was holding the gun when it discharged, hitting the victim.
Just before 10 p.m., a 19-year-old man who police say may have taken the gun from the scene turned himself into police.
No charges have been filed, but police said it is a possibility.
Sun-Times Media Wire contributed to this report