Police say the victim was struck at around 7 a.m.
The pedestrian was pinned under the bus and later pronounced dead at the hospital.
The bus, on route 74U, was going south to Newark at the time of the crash.
It had 48 to 50 passengers on board and was headed south on Main Avenue.
The passengers were transferred to another bus and the driver was removed.
The Passaic County Prosecutor's Office is investigating.
Get Eyewitness News Delivered