Chicago police said a 28-year-old man was on the train platform when he fell onto the tracks and made contact with the electrified rail in the 500-block of North Milwaukee Avenue.
The victim was transported to Northwestern Memorial Hospital, where he was pronounced dead.
The CTA said service was temporarily suspended between Damen and LaSalle due to a medical emergency on the tracks. Shortly after 8:30 a.m., trains resumed running and were bypassing the Grand station.