Metra Electric District trains were delayed up to 30 minutes after train No. 328 hit the person at about 3:30 p.m.
Trains were halted near the Bryn Mawr station on the South Side.
The pedestrian had a broken leg and lacerations, according to the Chicago Fire Department. In a tweet, CFD said the individual was too close to the track.
The patient, who was conscious and alert, was transported to Northwestern Hospital.