Police said the crash happened around 2:15 a.m. near Oak Park Avenue and Forest Preserve Drive in the Dunning neighborhood.
Officers were on patrol when they saw a gray sedan speeding northbound on Oak Park, CPD said. The driver failed to make a turn and crashed into a utility pole.
CPD said all three people in the vehicle suffered body trauma from the crash.
A 29-year-old man, who was a passenger in the vehicle, died from his injuries.
A woman, also a passenger, was badly hurt. At last check, she was in critical condition at Lutheran General Hospital.
The driver, another 29-year-old man, was taken to Illinois Masonic Hospital in good condition.
Citations are pending, and CPD's Major Accidents Unit is investigating.