The fall happened around 5:15 p.m. in the 3700 block of West 63rd Street in West Lawn, Chicago police said.
The boy, whose age is about 4 years old, fell out of a window, police said.
He was taken to Christ Hospital, where he was initially reported to be in critical condition, police said.
No further information surrounding the fall was immediately available.
This is a breaking news story. Check back with ABC7 for updates.