She's reportedly Janeen Hancock, 33, a mother of three. She was one of four people hit by gunfire at Merrill Park near 96th and Merrill.
Alixi Johnson, 17, was also killed. No one is in custody.
The four victims were among dozens of people shot in Chicago since Monday night.
Police say several shots were fired at approximately 10:30 p.m. Monday.
The victims were standing in the park at the time of the shooting.
Johnson was shot in the head and rushed to Advocate Christ Medical Center where he later died, making the death the first homicide this year for the small Southeast Side neighborhood.
A 21-year-old man was shot in the leg, and a 30-year-old woman was shot in the leg.
Authorities say they are investigating and looking for two suspects in the shooting, but they did not provide descriptions.