College Station police identified the victim as 19-year-old Garrett Cole Luce of College Station.
Investigators say Luce was struck shortly before 3 a.m. Sunday. The pedestrian was dead at the scene.
Union Pacific spokeswoman Raquel Espinoza says engineers saw something on the tracks and blew the train's whistle. Espinoza says the crew didn't know a person was on the tracks until the train got closer.
An autopsy has been ordered.